INDEX OF GENERA. 



Acanthodrilus , 



Achatina . 



Actinopyga 



Agriolimax 



Alepocephalus 



Alestes 



Amphioplus 



Amphipholis 



Amphiura . 



Anseropoda 



Arion 



Aspidodiadema 



Asterias 



Asterina . 



Asteronyx 



Astrocladus 



Astropecten 



Astrophiura 



Astropyga 



Astrothamnus 



Austrofromia 



Bathybiaster 

 Batrachus 

 Benthodytes 

 Bimastus . 

 Bregmaceros 

 Brisaster . 

 Brisinga . 

 Brissopsis 

 Bythocrinus 



Calandrella 



Calliaster . 



Centrechinus 



Centriscus 



Ceramaster 



Champsodon 



D 



E 



PAGE 



49 

 274 

 268 

 392 

 186 

 188 

 379 

 375 

 231 

 231 

 442 

 306 

 306 

 295 

 234 

 293 

 350 

 410 

 273 



70 



. 68 



. 441 



. 361 



. 300 



. 246 



161, 179 



443 



79 



290 

 405 

 418 

 393 

 394 

 397 

 390 

 375 

 387 

 373 



XI 



