100 PEECr SLADEN TRUST EXPEDITION. 



Family Cassididse. 



167. Cassis {Cyprcecassis) rufa (L.). 

 Loc. Coetivy I. 



Chagos Archipelago: Peros Banhos, Coin. 



1G8. Cassis (Semicassis) pila, Reeve. 

 Loc. Amirantes : Station E 9, 31 fathoms, shell-ruhhle. 

 Seychelles : Station F 3, 39 fathoms, hard sand. 



169. Cassis {Bezoardica) plicata (h.) [=plicaria, Jjnm.]. 

 Loc. Chagos Archipelago. 



170. Cassis iCasmaria) vibex [h.]. 

 Loc. Chagos Archipelago. 



171. Cassis (Casmaria) torquata. Reeve. 



Loc. Saya de Malha Banks : Station C 15, 55 fathoms. 

 Amirantes : Station E 5, 32 fathoms. 



172. Lambidiiim (Oniscidia) exquisitum (Ad. & Reeve). 



Oniscia exquisita, Adams & Reeve, Voy. Samarang, p. 35, pi. 5. fig. 3 a-h. 

 Oniscia exquisita. Reeve, Conch. Icon. v. Oniscia, sp. 3. 



Loc. Saya de Malha Banks : Station 15, 55 fathoms, loose Lithothamnia-vvihhle. 



One specimen only, in not very perfect condition, of this rare species, known by its 

 pink lip, the granulations thereon being white. In form very similar to L. cancellatum 

 (Sowb.). Lambidium, IJnk, 1807, as pointed out by Mr. Edgar Smith *, has precedence 

 of seventeen years over Oniscia, Sowerby, 1821. 



This species was first found in the Sulu Sea at 16-20 fathoms (LelcJier) ; and therefore 

 its discovery at Saya de Malha shows a very considerable extension of range. 



Family Tritonidae. (LotoriidsB.) 



173. Lotorium chlorostoma (Lam.). 

 Loc. Chagos Archipelago. 



174-. Lotorium pileare (L.) 



Loc. Cargados Carajos : Stntions B 3, 30 fathoms, sandy bottom ; B 21, 30 fathoms, 

 sand and weed. 



175. Lotorium [Gutttirnium) clavator (Li\.m.). 

 Loc. Amirantes : Station E 8, 33 fathoms, hard sand. 

 L. yallinago. Reeve, seems very near this species. 



* J. Malac. (1895) pp. 11-14. 



