i:i ! I 1:1 \. I .in i- 1 . \ i II!) 



I'l Ml 



I'A'.K. 



1-3. Cylichna ohrvivuxi Daut/. Camp, ft . . LMH 

 4-7. Cylichna richanli Daut/.. Camp. >-, . . .293 

 8-10. Retusa cro.i |;. I ). A I ). Moll ROOM. . . I'll 



11. RetuM umbiHoata Mont Sar>., LMM 



!'_' 11. Rrtusa umbilirata Mont. Moll. ROOM L'lM 



1~>-17. Cyliclma cylindracea Penn. Moll. L'on 



PLATE 30. 



I, 2, Cylichna noronyensis Wats. ('hall. IIi-p., 



3, 4. Cylichna labiata \Vat>. ('hall. Rep., . . . .313 

 5, 6. Cylichna reticulata Wats. Chall. Rep., . . :IU; 



7. Cylichua discus Wats. Chall. Rep., .... 



8, 9. Cylichna subreticulatji Wats. Chall. Rep., . . .817 

 10. Cylichna tahitensis Wats. Chall. Rep 320 



II. Retusa ovata Jeffr. Chall. Rep., 232 



1 Cylichna crispula Wats. Chall. Rep., . . 315 



PLATE 31. 



13, 14. Scaphander mundus Wats. Chall. Rep., . . .251 



15. Scaphander niveus Wats. Chall. Rep., . 



16. Scaphander punctostriatus Migh. Sars., . . . _1<; 



17. Scaphander lignarius L. Sars., .... 246 



18. Scaphander watsoni Dall. Blake Rep _M^ 



19. 20. Scaphander gracilis Wats. Chall. Rep., . . . LM7 

 21, 22. Scaphander lignarius L. Moll. Esp., . 245 



23. Scaphander lignarius L. Moll. Rouss., . . . .2 \~t 



PLATE 32. 



24, 25. Scaphander lignarius L., 245 



26. Scaphander interruptus Dall. Proc. U. S. Nat. Mus. 



27, 2S. Scaphander bathymophila Dull. IJIukr K-p.. . .256 

 29, 30. Atys gibbulus Jeffr. -= diaphana Arad. Ann. Ma-. 278 

 31, :>2. Scaphander nobilis Verril. Tr. ( lODD, A< a.! , . 2 1 () 

 33, 34. Scaphander issellii Bell. Bull. Soc. Mai. ItaL . . 255 

 35. Atys sandersoni Dall. Blake Rep., .... '27 ~> 

 :\i>. Atvs hyalina Wats. Chall. Rep., . . 271 

 87, Atys freyi Branoik naucum L . . . . . 264 

 38,39. Diaphana segucii/;.- Wats. Chall. Ki-p.. . . 282 



PI.AI i 



40, 41, Sniaragdinella andersoni Nev. J. A. s r, . . .260 



4'J. Smaragdiuella glaucii - viridis. Thes.. ... 



43, 44. Smaragdindla irlauca (,>. it G. Astrol., . . .268 



