MELVILL— MAlilNE MOLLUSCA. 113 



Pamily OlividaB. 



292. Olivet episcopalis. Lam. 

 Loc. Oliagos Archipelago. 



The O. cccriilea of Botten, whose names I am still chary of acloptiog, in spite of the 

 growing- tendency towards their recognition. 



293. Oliva erythrostoma. Lam. 



Ysx. 'ponderosa,J)\ic\oB. 

 Loc. Chagos Arcliipelago. 



294. Oliva guttata. Lam. 



Loc. Providence I. : Station D 1, 31 fathoms, dead coral covered with Algte, &c. 



Amirantes : Station E 25, 20-40 fathoms, rough coral hottora. 



Seychelles : Station F 7, 34 fathoms, sand, with weed. 

 0. emicator, Meuschen, is the older name for this species. 



295. Oliva irisans, Lam. 



Loc. Providence I. : Station D 1, 31 fathoms, with the preceding species. 

 Amirantes : Station E 9, 34 fathoms, Polyzoa and shell-ruhhle. 



296. Oliva. paxillus. Reeve. 



Loc. Amirantes : Station E 5, 32 fathoms, sandy liottom with much Cymodocea. 

 Chagos Archipelago (one specimen). 



297. Oliva pica, Lam. 

 Loc. Chagos Archipelago. 



One of the most recherche of Olives, and in which the coloration and pattern, though 

 variahle, is always unmistakahle. It is considered hy some authors a colour-variety 

 merely of O. tremulina. Lam., which, in its turn, with the very distinct O. erythrostoma, 

 Lam., is likewise placed under the common head of irisans, Lam. My personal opinion 

 is that they are both good species. Pica is more frequently known under the 

 name of olympiadina, Duclos. 



298. Oliva todosina, Duclos. 

 Loc. Chagos Archipelago. 



Placed by Tryon (Man. Conch, v. p. 87) as a synonym of 0. sidelia, Duclos, todosina 

 being the mature adult form. If this amalgamation be allowed, the distribution is wide, 

 extending from China to Madagascar. 



299. Ancilla rubigiuosa. Swains. 



Loc. Saya de Malha Banks : Station C4, ]50 fathoms. 



One dead shell, broken, and encrusted with various growths. It is, however, full- 

 grown and quite distinguishable. 



SECOND SERIES. — ZOOLOGY, VOL. XIII 15 



