66 dr. w. baird on new species of shells from [feb. 10, 



4. Descriptions of some New Species of Shells, collected 

 AT Vancouver Island and in British Columbia by 

 J. K. Lord, Esq,., Naturalist to the British North- 

 American I3ouNDARY Commission, in the years 1858- 

 1862. By W. Baird, M.D., F.L.S. 



1. Chrysodom us tabulatus, Baird. 



Ch. testa fusiformi, aspera, confertim lirata, liris incequaUbus, 

 minute squamatis ; anfractibus sex seu septem, superne concavo- 

 angulatis seu canaliculatis, ultimo magna, trientes duos longi- 

 tudinis testes adequante, et antrorsum in canalem Jlexuosum de- 

 sinente, suturis distinctis ; labro interno super columellam in- 

 Jlecto, umbilicum tegente. 

 Long. 3 inches; lat. 1^ inch. 



Hub. Esquimau Harbour, Vancouver Island. (Mm«. Brit.) 

 Only one specimen of this species was collected, and it had for 

 some time been the abode of a hermit-crab. It is of a perfectly fusi- 

 form shape, and the upper parts of the whirls next to the suture 

 are flattened and hollowed out into broad channels. The surface is 

 encircled with numerous, close-set, raised striae, which are of unequal 

 size, every fourth one being larger than any of the intermediate ones, 

 and all roughened by numerous small scales. The whirls are six or 

 seven in number (the upper ones being unfortunately broken off), 

 and rapidly increase in size, the last being two-thirds the length of 

 the whole shell. The columella is covered with a turned-over plate 

 of the inner lip, the umbilicus being partially concealed by it. 

 The lower canal is of considerable length, and is bent to one side. 

 The mouth appears to be rather small in proportion to the size of the 

 shell. When taken, it was inhabited by a species of Pagurus, and, as 

 is customary with shells similarly inhabited, was considerably injured 

 by its parasitic tenant. 



2. ViTULARiA ASPERA, Baird. 



Vit. testa fusiformi, purpurea, scabra, elongata, longitudinaliter 

 plicato-costata, transversim lirata, liris crebris et niinutissime 

 squamatis; anfractibus sex, ultimo trientes duos longitudinis 

 testcB adequante, in canalem rectum, longiusculum, apertum, de- 

 sinente ; columella planulata, fauce albida ; labro externo intus 

 dentato, extus serrato ; operculo oblongo, nucleo in margine ex- 

 terno sito. 

 Long. 1 inch ; lat. \ inch, 



Hab. Esquimau Harbour, Vancouver Island. {Mus. Brit.) 

 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 Buccitiidce. It is of a 

 purple colour ; and the surface of the shell is rough, with numerous 

 small scales on the raised striae which encircle it. The longitudinal 

 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. 



