WEST AMERICAN PYRAMIDELLID MOLLUSKS. 61 



TURBONILLA (PYRGOLAMPROS) VICTORIANA Dall and Bartsch. 

 Plate 5, fig. 3. 



Turhonilla {Pyrgolavipros) victoriana Dall and Bartsch, Proc. U. S. Nat. Mus., 

 vol. 33, 1907, p. 501, pi. 44, fig. 6. 



Shell eloiio;ate-coiiic, wax yellow to light brown. Nuclear whorls 

 and the early succeeding turns eroded in all the specimens examined. 

 Post-nuclear whorls quite high between the sutures, somewhat con- 

 cave in the posterior two-thirds of the exposed portion, only slightly 

 contracted toward the periphery and faintly shouldered at the sum- 

 mit; ornamented by low, rounded, somewhat sinuous axial ribs, wl^ch 

 are about as wide as the shallow intercostal spaces. Sutures well 

 marked. Periphery and base of the last whorl somewhat inflated, 

 marked by weak continuations of the axial ribs which extend feebly 

 to the umbilical region. Entire surface crossed by numerous, wavy 

 spiral striations. Aperture rather elongate, oval, outer lip thin; 

 columella moderately long, decidedly twisted and somewhat revolute 

 in its free anterior portion; the twist at its insertion appearing as a 

 fold. 



The type (Cat. no. 126660a, U.S.N.M.) was collected by Dr. C. F. 

 Newcombe at Victoria, Vancouver Island, British Columbia. It has 

 the last seven and a half whorls and measures: Length 7 mm., diame- 

 ter 2.1 mm. Ten additional speciments were collected by Rev. G. W. 

 Taylor, at Departure Bay, Vancouver Island, British Columbia, four 

 of which form Cat. no. 196220, U.S.N.M. 



This species appears nearest related to Turhonilla. (Pyrgolampros) 

 netvcomhei Dall and Bartsch, but is readily distinguished from that 

 form by its concave whorls. 



"ftjRBONILLA (PYRGOLAMPROS) GIBBOSA Carpenter. 



Plate 6, fig. 2. 

 Chemnitzia gibbosa Carpenter, Cat. Mazatlan Shells, 1856, p. 430. 



Shell pupiform, reddish brown, irregular. (Nuclear whorls decol- 

 lated.) Post-nuclear whorls ten, flattened, marked with about eight- 

 een poorly developed, more or less rounded, vertical axial ribs. Tliis 

 species is described, although from a solitary and very imperfect 

 specimen, in consequence of its great peculiarity of form, in which it 

 resembles Chrysallida. It is short, stumpy, and very broad; without 

 any trace of fold on the columella or notch on the base. Length 

 6.75 mm., diameter 5 mm. 



Ilahitat. — Mazatlan; off Chama, extremely rare; Liverpool collec- 

 tion. 



Tablet 1996 contains all that was found, namely, the broken speci- 

 men, and a fresh fragment displaying sculpture. 



