288 On new Species of Shells from Vancouver Island. 



Chemnitzia Lordii. 



Shell subulate, whitish, banded at the sutures with light 

 brown, with a narrow line of the same colour round the middle 

 of the whorls. The latter 12-13, slightly convex, about 

 twice as broad as high, longitudinally ribbed and spirally 

 striated in the interstices. Costa? only slightly oblique, 

 scarcely arcuate, rather broader than the interstices, about 

 18-20 on each volution, those upon the last terminating 

 abruptly at the periphery. Suture hardly oblique, feebly 

 undulating. Last whorl finely concentrically striated below 

 the middle. Base pale brown, with a single white zone. 

 Aperture a little longer than broad and a trifle effuse at the 

 base. Columella simple, white, nearly erect. Length 13 

 millims., diam. 3|. 



The colour of this interesting species at a short distance 

 from the eye appears to be a uniform pale brown, but on close 

 inspection proves to consist of light zones with intermediate 

 brownish ones. The apex of the single specimen at hand is 

 worn ; hence I cannot offer a description of the nuclear whorls. 

 The transverse strige are described as being in the interstices 

 between the costee ; but in reality they are more or less feebly 

 continuous upon them. 



The name imposed upon this shell will awake pleasant 

 recollections, in the minds of those who knew him, of one 

 who passed away some years since. J. Keast Lord, a most 

 liberal donor to the museum, did much to extend our know- 

 ledge of the natural history of Vancouver Island. 



Trochus [Margarita) Vancouver ensis. 



Shell conical, moderately umbilicated, greyish white. 

 Whorls five, slightly convex, with oblique, flexuous ribs ex- 

 tending from suture to suture, also obscurely spirally striated. 

 Last whorl obtusely angulated at the middle, rather flattened 

 beneath, with four or five concentric sulci at the angle, of 

 which the three uppermost are broader than those below ; and 

 the interstices or lirse between them are also stouter. The 

 rest of the flattened base is arcuately plicated, or, in other 

 words, exhibits the continuation of the costge upon the upper 

 half of the volution, which are interrupted by the sulci at the 

 periphery. Umbilicus smallish, surrounded by a subtuber- 

 culous double ridge. Aperture subrotund, flattened at the 

 base, iridescent within. Columella a trifle arcuate, somewhat 

 expanded above, and at the lower extremity forming an angle 

 with the base. Length 6^ millims., diam. 6| ; aperture 

 nearly 3 long and wide. 



