Chaster — On the MoUusca obtained hy the R.I. A. Cruises. 27 



P. PEs-iuTR^, Linne, sp. ( Ostrea), var. septejieabtatus, Miiller. 

 Station YI. Log 67 ; depth, 80-370 fathoms. 



P. siMiiis, Laskey. 



Logs 12, 16, 17, 20, 23, 28, 30, 33, 34, [56], 67 ; depth,. 

 30-120 fathoms. 



[P. viTEEUs, Chemnitz, sp. {Pallium). 



Log 59] ; depth, 90-370 fathoms. 



PoTNA BTJDis, Linne. 



Logs 3, [56]. 



MxxiLTJS EDULis, Linne. 



Stations [YIL], VIII. Logs 6, 30, 35, 62, 63, 64, 70, B, 



c, r. 



MoDioLtrs MODIOLUS, Linne, sp. {Mytilus). 

 Log 21. 



M. PHASEOiiNTjs, Philippi, sp. {Modiola). 



Station YIII. Logs 9, 12, 19, 22, 28, 31, 33, 35, 40, 41,. 

 [52], 62. 



MoDioLAEiA DiscoKS, Linne, sp. {Mytilus), 

 Log 26. 



M. MAEMOEATA, Eorbes, sp. {Mytilus). 



Logs 28, 35, 39, 40, 50, [62], 63, 70. 



M. cosxuLATA, Eisso, sp. {Modiolus). F. 

 A few valves. 



Ceenella dectjssata, Montagu, sp. {Mytilus). 

 Log 17. 



LiMOPSis AUEiTA, Brocchi, sp. {Area). 



Log 67. A smaU live specimen. 



AxTw^A GLTcniEEis, Linne, sp. {Area). 



Station YIII. Logs 6, 17, 30, 31, 33, 34, 55. 



Aeca peciujS'Culoides, Scacchi. 



Station YII. Logs 17, 18, 56 ; depth, 40-110 fathoms. 



A. iactea, Linne. 

 Log 33. 



A. teteagona, Poli. 



[Station YIII.] Logs 9, 12, 28, 30, 31, 33, 34, [53 living], 

 55. 



