Alamy logo

. The illustrated natural history [microform]. Reptiles; Fishes; Mollusks; Natural history; Reptiles; Poissons; Mollusques; Sciences naturelles. THE Sinr-WORM. 437 ,.,v;itniv forms is I'itlior wholly or partially liiicil with .slioll, and it is wortliy of notico lliiit till' Slii|iw(inn and its mode of huirowiii^' was tho object that gave Sir I. iJrimel the iilcii di' liiu Tliaiues Tuiiucl.. SUU'-WUUJI.-Ytin/o Jiufulie. hi The Teredo did not always h'nd this fixed and daiklintj lii'e, but at one time of its oxistenee it swam freely thruii;;;h tho oeeaii, liavinL; organs of sight and hearing fo

. The illustrated natural history [microform]. Reptiles; Fishes; Mollusks; Natural history; Reptiles; Poissons; Mollusques; Sciences naturelles. THE Sinr-WORM. 437 ,.,v;itniv forms is I'itlior wholly or partially liiicil with .slioll, and it is wortliy of notico lliiit till' Slii|iw(inn and its mode of huirowiii^' was tho object that gave Sir I. iJrimel the iilcii di' liiu Tliaiues Tuiiucl.. SUU'-WUUJI.-Ytin/o Jiufulie. hi The Teredo did not always h'nd this fixed and daiklintj lii'e, but at one time of its oxistenee it swam freely thruii;;;h tho oeeaii, liavinL; organs of sight and hearing fo Stock Photo
Preview

Image details

Contributor:

The Book Worm / Alamy Stock Photo

Image ID:

REPR05

File size:

7.1 MB (413.7 KB Compressed download)

Releases:

Model - no | Property - noDo I need a release?

Dimensions:

2086 x 1198 px | 35.3 x 20.3 cm | 13.9 x 8 inches | 150dpi

More information:

This image is a public domain image, which means either that copyright has expired in the image or the copyright holder has waived their copyright. Alamy charges you a fee for access to the high resolution copy of the image.

This image could have imperfections as it’s either historical or reportage.

. The illustrated natural history [microform]. Reptiles; Fishes; Mollusks; Natural history; Reptiles; Poissons; Mollusques; Sciences naturelles. THE Sinr-WORM. 437 ,.,v;itniv forms is I'itlior wholly or partially liiicil with .slioll, and it is wortliy of notico lliiit till' Slii|iw(inn and its mode of huirowiii^' was tho object that gave Sir I. iJrimel the iilcii di' liiu Tliaiues Tuiiucl.. SUU'-WUUJI.-Ytin/o Jiufulie. hi The Teredo did not always h'nd this fixed and daiklintj lii'e, but at one time of its oxistenee it swam freely thruii;;;h tho oeeaii, liavinL; organs of sight and hearing for the purpose of guariling itself against tho dangers of the liicp. The following descrii)tion of tiu' siuM'i'ssive stages of this nioUuse is fidiii the ])en of the able naturalist whom we have ahvady nientiouod, and who has devoted nmch lime to tho study of the Ship-woriu and its liiiliits. " The larva, wliich Is at first almost s|)herical and entirely covered with viinatile cilia, iiiav lie lonijiared to a very miiinte lirdgehog, in which every spine acts as a natatory ovfiiu. It swims in all directions with cxtremi' agility, and tlas first state continues about a day and a half. Towards the end of this time the external skin bursts, and after bein<T encrusted M'ith calcareous salts, becomes a shell, which is at first oval, then triangular, and at last very nearly spherical. While the shell is bein.; formed the vibratilo cilia disappear, but the little animal is not on that account condemned to inactivity. In proportion as the external cilia diminish we observe that another equally ciliated organ hecoines developed, which widens and extends in such a manner as to form a large collar or rufr inargineil with fringes. This new organ cd' licoiiiotion may be entirely (nuccaled within the shell, or may be extended from it, and ads in the manner of the padille-wheel of a steandioat. iiy means (d' this apjtaratus the young larva continues tn swim with ns nmch facility as in i

Save up to 30% with our image packs

Pre-pay for multiple images and download on demand.

View discounts