NO. 7 SEA-LILIES AND FEATHER-STARS CLARK 4I 



Fig. 15. The terminal comb on the oral pinnules of Leptonemastcr vcnustus 

 in external, internal and ventral view. 



16. The tip of an outer pinnule of Capillastcr multiradiata in lateral 



and dorsal view, showing the long spines. 



17. The division series and arm bases of Conianthus hcnnetti with, on 



the right, homologous ossicles shown similarly shaded. 



PLATE 2 



Fig. 18. The calcareous deposits in the perisome bordering the ambulacral 

 grooves and in the tentacles of the pinnules of Dorometra 

 parvicirra. 



19. The same in Leptoncmaster venustus. 



20. The same in Eudiocrinus juncens. 



21. The same in Hetcrometra bengalensis. 



22. The same in Aviphimetra discoidea. 



23. The calcareous deposits in the perisome bordering the ambulacral 



grooves in Psathyrometra antarctica. 



24. The same in Pentametrocrinus varians. , 



25. The same in Euniorphometra concinna. 



26. The same in Saramctra triserialis. 



27. The side and covering plates of Glyptomctra tuberosa; the latter 



(above) are hinged to the former and can be closed down over 

 the ambulacral grooves. 



28. A side plate of Strotometra hcpbuniiana in (upper) interior and 



(lower) dorsal view. 



29. Interior view of two side plates of Pachylometra distincta. 



30. Ventral view of a portion of a pinnule of Pachylometra distincta 



showing the side and covering plates, the latter closed down 

 over the ambulacral groove. 



31. Lateral view of the side and covering plates of Pachylometra dis- 



tincta, the latter partially closed down. 



PLATE 3 

 Fig. 32. Diagram showing the relative proportions of the arms and cirri in 

 Asteroinetra macropoda; the cirri are adapted to clinging to 

 very rough bottom. 



33. Diagram showing the relative proportions of the arms and cirri in 



Comactinia echinoptera; the short, strong and stout cirri are 

 well fitted to hold the animal securely. 



34. Diagram showing the relative proportions of the arms and cirri in 



Pentametrocrinus tuberculatus; the animal is very different in 

 every way from the preceding, but the cirri are of the same type. 



35. Diagram showing the relative proportions of the arms and cirri in 



P cntametrocrinns varians; the cirri collectively form a sort of 



circular mat supporting the animal on soft ooze. 

 2,6. The grooved anterior (left) and ungrooved posterior (right) arms 



of a specimen of Comatula pectinata, drawn to the same scale. 

 27. A cirrus of Capillastcr multiradiata in dorsal (upper) and lateral 



(lower) view, showing the dorsal spines. 

 38. A smooth cirrus in dorsal (upper) and lateral (lower) view. 



