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Bulletins of American paleontology . Height of fragment 24.5 mm, width 20 mm. Ex-terior and interior views of part of a connected ambulacrumand interambulacrum, X 1.7. 10. Specimen L600al. PRI27662. Spine recovered from specimen L600a. Length 5.1mm, diameter above neck 1.2 mm, X 5.4. 11-13. SpecimenL600C, PRI 27663. Height 10 mm, breadth of arch 7.5 mm.Views of half-epiphysis, X 3. All of the above specimensare from the Playa Grande Formation (Catia Member). 358 Bulletin 252 Explanation of Plate 16 Figure Page 1-7. Echinometra lucunter (Linnaeus) 302 1-4. Specimen A606a. PRI 27664. Length 45 m

Bulletins of American paleontology . Height of fragment 24.5 mm, width 20 mm. Ex-terior and interior views of part of a connected ambulacrumand interambulacrum, X 1.7. 10. Specimen L600al. PRI27662. Spine recovered from specimen L600a. Length 5.1mm, diameter above neck 1.2 mm, X 5.4. 11-13. SpecimenL600C, PRI 27663. Height 10 mm, breadth of arch 7.5 mm.Views of half-epiphysis, X 3. All of the above specimensare from the Playa Grande Formation (Catia Member). 358 Bulletin 252 Explanation of Plate 16 Figure Page 1-7. Echinometra lucunter (Linnaeus) 302 1-4. Specimen A606a. PRI 27664. Length 45 m Stock Photo
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The Reading Room / Alamy Stock Photo

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2AJC39N

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7.1 MB (440.1 KB Compressed download)

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1297 x 1926 px | 22 x 32.6 cm | 8.6 x 12.8 inches | 150dpi

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Bulletins of American paleontology . Height of fragment 24.5 mm, width 20 mm. Ex-terior and interior views of part of a connected ambulacrumand interambulacrum, X 1.7. 10. Specimen L600al. PRI27662. Spine recovered from specimen L600a. Length 5.1mm, diameter above neck 1.2 mm, X 5.4. 11-13. SpecimenL600C, PRI 27663. Height 10 mm, breadth of arch 7.5 mm.Views of half-epiphysis, X 3. All of the above specimensare from the Playa Grande Formation (Catia Member). 358 Bulletin 252 Explanation of Plate 16 Figure Page 1-7. Echinometra lucunter (Linnaeus) 302 1-4. Specimen A606a. PRI 27664. Length 45 mm, width 39mm, height 21 mm. 1-3. Abactinal, ambital, and actinal as-pects, X L4. 4. View showing tubercles and arrangement ofpore-pairs, X 2.5. 5,6. Specimen A606b. PRI 27665. Length45 mm, width 34 mm, height 23 mm. Actinal and ambitalaspects, X 1.5. 7. Specimen A606d. PRI 27666. Length 18mm, diameter above neck 2.5 mm. Primary spine, broken attip, X 3. All of the above specimens are Recent. Bull. Amer. Paleont., Vol. 56 Plate 16. Bull. Amer. Paleont., Vol. 56 Plate 17 •^^iR^J

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