7(14 BULLETIN 82, UNITED STATES NATIONAL MUSEUM. 



PLATE 27. 

 Adambulacral deposits of various comatuliax. 



FIG. 1166. Aglaometra incerta, apparently from a dried specimen. (After P. H. Carpenter.) 



1167. Charitometra Itasicurva, lateral view of portion of pinnule mounted in dammar 



(After P. H. Carpenter.) 

 1168. Pachytomctra integualis, lateral view of portion of a pinnule, apparently dried. 



(After P. H. Carpenter.) 

 1169. P<Ecttometra acosla, lateral view of portion of a pinnule, apparently dried. (After P. 



H. Carpenter.) 

 1170. Hathrometra prolixa, lateral view of portion of arm of pentacrinoid at time of first 



appearance of pinnules and cirri, with tentacles omitted. (After Mortensen.) 

 1171. Thalassometra agassixii, lateral view of portion of pinnule, showing skeleton only. 



(After Hartlaub.) 

 1172. Same. (After Hartlaub.) 

 1173. Antedon biftda, lateral view of growing arm of young pentacrinoid. (After Wyville 



Thomson. ) 

 1174. Hathrometra. sarsii. portion of arm of pentacrinoid with six brachials developed. 



(After M. Sars.) 



PLATE 28. 

 Eggs and larva; of certain comatulids. 



FIG. 1175. Portion of arm of specimen of Comanthvs parvicirra, showing eggs attached to bases 



of pinnules. (After P. H. Carpenter.) 

 1176. Antedon biftila, young embryo seen through vitelline membrane. (After Wyville 



Thomson.) 



1177. Same. (After Wyville Thomson.) 

 1178. Same. (After Wyville Thomson.) 

 1179. Antedon bifida, embryo. (After Wyville Thomson.) 

 1180. Antedon bifida, dorsal view of embryo shortly after rupture of vitelline luembraiif. 



(After Wyville Thomson.) 



1181. Antedon bifida, ventral view of a slightly older embryo. (After Wyville Thomson.) 

 1182. Antedon mediterranea, surface view of larva of fifth day, still in vitelline membrane, 



showing the yellow cells. (After Bury.) 

 1183. Antedon, mediterranea, surface view of free larva of sixth day, from ri^ht side. 



(After Bury.) 

 1184. Antedon mediterranea, surface view of larva of seventh day, from left side. (After 



Bury.) 

 1185. Antedon mediterranea, surface view of larva early on eighth day, from ventral side. 



(After Bury.) 



Pl.ATK 2J. 



Larva; of Antedon. 



Fio. 1180. Antedon Mfida, ventral view of embryo shortly before disappearance of ciliated 



bands. (After Wyville Thomson.) 



1187. Lateral view of same. (After Wyville Thomson.) 

 1188. Dorsal view of same. (After Wyville Thomson.) 

 118ft. Antedon bifida, dorsal view of embryo not long after rupture of vitelline membrane. 



(After Wyville Thomson.) 

 1190. Antedon mediterranea, diagram showing arrangement of skeletal plates in larva of 



seventh day. (After Bury.) 



