278 THE STELLEROIDEA 



FAMILY 2. OPHIOLEPIDIDAE. Zygophiurae with oral papillae from 

 three to six, of which the last may be infra-dental. Arm incisures on the 

 disc. Dental papillae absent. Genera Ophiolepis, Mull. & Trosch. ; 

 Ophiocten, Liitk. ; Ophiura, L. Ag. ; Ophioglypha, Lym. ; Ophioceramis, 

 Lym. ; (?) Ophiochiton, Lym. ; Ophiopaepale, Lym. ; Ophiozona, Lym. ; 

 Ophioplinthus, Dan. ; Ophiernus, Lym. ; Amphiglypha, Pohl. ; Geocoma, 

 d'Orb. 



FAMILY 3. AMPHIURIDAE. Zygophiurae with oral papillae from one 

 to five, of which the last is generally infra-dental. Arms inserted on 

 ventral side of disc. Dental papillae absent. Genera Amphiura, Forbes ; 

 Ophiocnida, Lym. ; Ophiomusium, Lym. ; Ophiopeltis, Daniels. & Kor. ; 

 Ophiocentrus, Ljung. ; Amphilepis, Ljung. ; Ophiolepis, Lym. ; Ojihiomartus, 



FIG. XXXIII. 

 Abactinal view of Hemipholis conlifera, Lym. c, central plate ; r, plates of radial circlet. 



Lym. ; Ophiophyllum, Lym. ; Ophiotrochus, Lym. ; Hemipholis, Lym. (Fig. 

 XXXIII.); Ophiactis, Liitk.; Ophiopus, Ljung.; Ophiopholis, Liitk. (Fig. 

 XIII.); Ophiacantlia, Mull. & Trosch. ; Ophiotrema, Koehl. ; Pectinura, Heller 

 (non Forbes) ; Ophioplocus, Lym. ; Ophionereis, Liitk. ; Amphipholis, Ljung. ; 

 Ophiophragonus, Lyrn. ; Ophiostigma, Liitk. ; Ophioblenna, Liitk. ; Ophio- 

 cymbium, Lym. ; Ophiochytra, Lym. ; Ophiolebes, Lym. ; Ophiomitra, Lym. ; 

 Ophiocamax, Lym. ; Ophiotharnnus, Lym. ; Acroura, Ag. ; Aspidura, Ag. ; 

 Hemiylypha, Pohl. ; Polypholis, Dune. 



FAMILY 4. OPHIOCOMIDAE. Zygophiurae with both oral and dental 

 papillae. Genera Ophiocoma, L. Ag. ; Ophiomastix, Mull. & Trosch. ; 

 Ophiarthrum, Pet. ; Ophiopsila, Forbes ; Ophiopteris, E. A. Smith. 



FAMILY 5. OPHIOTHRICIDAE. Zygophiui-ae with dental papillae, but 

 no oral papillae. Genera Ophiothrix, Mull. & Trosch. ; Ophiocnemis, Mull. 

 & Trosch. ; Ophiogymna, Ljung. ; Ophionema, Liitk. ; Ophionephthys, Liitk. ; 

 Ophiomaza, Lym.; Ophiothela, Verr. ; Ophiopsammium, Lym. ; Ophiopteron, 

 Ludw. ; (?) Ophiurelki, Ag. 



