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 Buccinide. It is of a purple colour; and 
the surface of the shell is rough, with numerous small 
scales on the raised strize 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. (Brit. 
Mus.) 
PYRAMIDELLIDZE. 
Murex foliatus. (Lamk.) Esquimalt Harbour, between tide marks. 
Purpura emarginata. (Reevye.) Esquimalt Harbour, between tide marks. 
Chemnitzia vancowverensis. (Baird: Nov. Sp.) 
Testa elongato-turrita, cylindrica, longitudinaliter 
oblique forte costata; anfractibus novem, ultimo 
superne indistincte costato, infra levigato; 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, which 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- 
