72 ROYAL SOCIETY OF CANADA 
240. OCINEBRA INTERFOSSA, Carpenter. 
tept. Brit. Assoc., 1863, p. 663 (August, 1864); and Proc. Acad. Nat. Sci. Phila., 
1865, p. 64. 
Both the above are common littoral shells, occurring all through 
the7province under stones, near low water mark. Both are subject to 
considerable variation. 
CEROSTOMA, Conrad. 
241. CEROSTOMA FOLIATUM, Martyn, sp. 
Purpura foliata, Martyn, Univ. Conch., vol. ii., no. 66, pl. xxiv., fig. 1 (1784). 
= Murex foliatus, Gmelin. 
— M.monodon, Esch., 
etc., etc. 
At extreme low tide on all our rocky coasts. 
PURPURA, Bruguière. 
242. PURPURA CRISPATA, Chemnitz, sp. 
Bucciniun crispatum, Chem., Mart. Conch. Cab., vol. xi., p. 84, pl. 187, figs. 1802, 1803 
(1795). 
— M. lactuca and M. ferrugineus, Esch. (1829), 
etc., ete. 
243, PURPURA LIMA, Martyn, sp. 
) Y2,S] 
Buccinum lima, Mart., Univ. Conch., vol. ii., no. 46, pl. xv., fig. 1 (1784). 
= canaliculata, Duclos (1832). 
— decemcostata. Midd. (1849). 
244. PuRPURA SAXICOLA, Valenciennes. 
Zool. Voy. Venus, pl. viii., fig. 4 and 4a (1846). 
These three species of Purpura are all common on rocks between 
tides and here at any rate are quite distinct from one another in all their 
varieties. 
From some few localities these shells are absent without any appar- 
ent cause. For instance. during three days shore collecting at Nanaimo 
last year, I did not see a single specimen of either lima or saxicola and 
only in one spot a few specimens of crispata. 
There are conchologists who would place all these species under one 
name and there are others who would consider even this a synonym of 
the Purpura lapillus of the Atlantic. Many varieties of P. saxicola have 
been honoured with separate names, which however are hardly worth 
preserving. 
