358 APPENDIX. 



dentato, extus serrato ; operculo oblongo, nucleo in 

 margine externo sito. 



This shell partakes much of the character of a species 

 of Murex ; but the oblong operculum, with its nucleus 

 situated on the external edge towards the middle, places 

 it among the Buccinidce. It is of a purple colour ; and 

 the surface of the shell is rough, with numerous small 

 scales on the raised stria? which encircle it. The longi- 

 tudinal plaits or varices are about ten in number, and 

 are least distinct on the last whirl. The mouth is ovate, 

 and the canal of moderate length and straight. Long. 

 1 inch; lat. ^ inch. Hab. Esquimalt Harbour. (B-rH. 

 Mus.} 



PYRAMIDELLID^:. 



Murex foliatus. (Lamk.) Esquimalt Harbour, between tide marks. 

 Purpura emarginata. (Reeve.) Esquimalt Harbour, between tide marks. 



Chemnitzia vancouverensis. (Baird : Nov. Sp.) 



Testa elongato-turrita, cylindrica, longitudinaliter 

 oblique forte costata ; anfractibus novem, ultimo 

 superne indistincte costato, infra Isevigato ; apertura 

 parva, rotundato-ovato; suturis impressis. 



This shell is peculiarly ribbed. The eight upper 

 whirls are strongly and somewhat obliquely ribbed ; but 

 on the last, whicli is the largest, the ribs are indistinct 

 on the upper half, and on the lower half disappear 

 altogether. The interstices between the ribs, which in 

 the penultimate whirl are about sixteen in number, 

 appear smooth. The sutures are deep and well marked. 

 The mouth is rather small, and is somewhat rounded- 



