. Journal of experimental zoology. ectoplasm becomes very thick at theanimal pole, and the endoplasm forms a ball that is attached tothe surface at the vegetative pole by the substance of the polarlobe (polar ectoplasm) (Figs. JJ and 78). Thus it will be seen that the presence of numerous nuclei or ofan extended nuclear reticulum, situated between ectoplasm and endo-plasm, results m a different arrangement of the ectoplasm and endo- 242 Frank R. Li Hie plasm fro/n that found in the uninucleated ova luhere the nucleus iscentral in position. In the multinucleated ova the polar distributionof sub
RM2AGEMBE. Journal of experimental zoology. ectoplasm becomes very thick at theanimal pole, and the endoplasm forms a ball that is attached tothe surface at the vegetative pole by the substance of the polarlobe (polar ectoplasm) (Figs. JJ and 78). Thus it will be seen that the presence of numerous nuclei or ofan extended nuclear reticulum, situated between ectoplasm and endo-plasm, results m a different arrangement of the ectoplasm and endo- 242 Frank R. Li Hie plasm fro/n that found in the uninucleated ova luhere the nucleus iscentral in position. In the multinucleated ova the polar distributionof sub
The Journal of experimental zoology . / ?^ m / /  ^-. X /^ V K, ^ I-n /^ ^ --. M ^ ^ r I-K 10 11 12 13 14 15 16 17 IS 19Disk diameters in millimeters. Fig. 3. Brittle-star, Ophioglypha lacertosa. Comparison of lengths of regenerated arms in Series III and IVbined (three and four arms removed), dotted lines, with Series I and II combined (one and tworemoved), unbroken lines. Upper curves, 23 days; middle curves, 33 days; lower curves, 46 daysafter operation. The regenerated arm lengths are greater in Series III and IV than in Series I and II. comarms Compensatory Regulation. 13 viduals of 19
RM2ANHBY3The Journal of experimental zoology . / ?^ m / / ^-. X /^ V K, ^ I-n /^ ^ --. M ^ ^ r I-K 10 11 12 13 14 15 16 17 IS 19Disk diameters in millimeters. Fig. 3. Brittle-star, Ophioglypha lacertosa. Comparison of lengths of regenerated arms in Series III and IVbined (three and four arms removed), dotted lines, with Series I and II combined (one and tworemoved), unbroken lines. Upper curves, 23 days; middle curves, 33 days; lower curves, 46 daysafter operation. The regenerated arm lengths are greater in Series III and IV than in Series I and II. comarms Compensatory Regulation. 13 viduals of 19
Journal of experimental zoology . THE JOURXAt. OF EXPERIMEXTAC ZOOLOGr, VOL. 18, .VO. 1 uado hsxjiv BAVa ON m m 8C ?8 eiSlHdOdXH eavNaavadns saNvao xaB «o Oi s CO I-H XHOiaii iaoa HxoNai aivi HioNaT iaoa O o O O o o o CO «o 3 l> 00 s o o 00 S ao Oi  ;-^ a. Oo >> ••s i o «50 CO Xi Ph O^^ CZ2 03 Ph 66 O C35 o . «.2 05 *> CO T-i Ph n 00 t^ ^ O) t^- »c rH i> -l »—( »-i 1-^ »o 00 CD r-l CO CO d d d d 1 02 ^ i. O 05 T-l to o d 05 00 7 d d 2§ d 1 o o o o o d d d CO d lO d CO O O»o O1^ d 00 d CO C c o•+3 o OS « >> a>tiC >« - c «- O O -^^ aO w r Cl ::5 J^ P-( 67 rv EXPERIMENT
RM2AN6C52Journal of experimental zoology . THE JOURXAt. OF EXPERIMEXTAC ZOOLOGr, VOL. 18, .VO. 1 uado hsxjiv BAVa ON m m 8C ?8 eiSlHdOdXH eavNaavadns saNvao xaB «o Oi s CO I-H XHOiaii iaoa HxoNai aivi HioNaT iaoa O o O O o o o CO «o 3 l> 00 s o o 00 S ao Oi_ ;-^ a. Oo >> ••s i o «50 CO Xi Ph O^^ CZ2 03 Ph 66 O C35 o . «.2 05 *> CO T-i Ph n 00 t^ ^ O) t^- »c rH i> -l »—( »-i 1-^ »o 00 CD r-l CO CO d d d d 1 02 ^ i. O 05 T-l to o d 05 00 7 d d 2§ d 1 o o o o o d d d CO d lO d CO O O»o O1^ d 00 d CO C c_o•+3 o OS « >> a>tiC >« - c «- O O -^^ aO w r Cl ::5 J^ P-( 67 rv EXPERIMENT
The Journal of experimental zoology . S- /o IS iX> 25 30 3S *^ fS- SO SS 60 65- ?o 7S- 30 95 90 584 FRANK A. HAYS - —1 1 1— 1 1 GHartNO. Ill- 1 1 1 1 1 I 1 1 1 1 I I7ZS   (jftOWTH UU«VES IN O EnwicE b ROOPS ^ l&CC L L itte R 5 IzE O / - / /47S - / 1 O / X /3SC 5- 2 /o .  /21S 20 ^ IICC % y / ^y t7S ^ 725- -£ z/^ ice 5 y , 7 47S y .: / 3f0 y  ^^^ • JlS y ^<^X^^^ looc ^ 1 1 1 1 1 Agc IM DAYS1 1 1 1 1 1 1 1 1 1 1 /. ..T Ju jy .7c J S *^ ^^ 5J Sir Co es 7o v-s so sj- 7c n 1 1 1 1 r T 1 r-—I 1 r /&00 filSO JiooIIS sso izn (cCO tli - Jiza- Joc C ChART NO. IE. Qtrowth GuBves JM OfP^vice Gwoyps
RM2AN7HD4The Journal of experimental zoology . S- /o IS iX> 25 30 3S *^ fS- SO SS 60 65- ?o 7S- 30 95 90 584 FRANK A. HAYS - —1 1 1— 1 1 GHartNO. Ill- 1 1 1 1 1 I 1 1 1 1 I I7ZS _ (jftOWTH UU«VES IN O EnwicE b ROOPS ^ l&CC L L itte R 5 IzE O / - / /47S - / 1 O / X /3SC 5- 2 /o . /21S 20 ^ IICC % y / ^y t7S ^ 725- -£ z/^ ice 5 y , 7 47S y .: / 3f0 y _^^^ • JlS y ^<^X^^^ looc ^ 1 1 1 1 1 Agc IM DAYS1 1 1 1 1 1 1 1 1 1 1 /. ..T Ju jy .7c J S *^ ^^ 5J Sir Co es 7o v-s so sj- 7c n 1 1 1 1 r T 1 r-—I 1 r /&00 filSO JiooIIS sso izn (cCO tli - Jiza- Joc C ChART NO. IE. Qtrowth GuBves JM OfP^vice Gwoyps
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. The Journal of experimental zoology. arm of Octopus vulgaris according to Guerin.a, epithelium; b, subcutaneous connective tissue; c, chromatophores; d, vein;e, dermal musculature;/, perimuscular connective-tissue membrane; g, externaloblique muscle; i, inner oblique muscle; j, inner lateral longitudinal muscle;k, external longitudinal muscle; I, internal longitudinal muscle bundle; m, trans-verse musculature; n, perinervous connective tissue; o, layer of ganglia; p, cen-tral mass of nerve fibers (neuropil); q, myelin cords; r, brachial arteries; s, nerve;t, sucker; u, sucking cavity; i>,
RM2CENK9N. The Journal of experimental zoology. arm of Octopus vulgaris according to Guerin.a, epithelium; b, subcutaneous connective tissue; c, chromatophores; d, vein;e, dermal musculature;/, perimuscular connective-tissue membrane; g, externaloblique muscle; i, inner oblique muscle; j, inner lateral longitudinal muscle;k, external longitudinal muscle; I, internal longitudinal muscle bundle; m, trans-verse musculature; n, perinervous connective tissue; o, layer of ganglia; p, cen-tral mass of nerve fibers (neuropil); q, myelin cords; r, brachial arteries; s, nerve;t, sucker; u, sucking cavity; i>,