496 PROCEEDINGS OF THE NATIONAL MUSEUM. vol. xxxiii. 



the greatest convexity on the lower half of the exposed portion; orna- 

 mented by about 10, very broad, strong, slightly protractive axial 

 ribs on the second, 14 on the fifth, 16 on the eighth, and 18 on the 

 penultimate whorl. These ribs terminate before thev reach the 

 periphery of the whorl, leaving a phiin band above the suture, as in 

 T. torquata Gould, but not as broad as in that species. Intercostal 

 spaces deep, narrower than the ribs. Sutures well marked by the 

 shouldering at the summit and the sudden sloping of the ribs just 

 above the periphery of the whorls. Aperture subovate; lip thin, 

 joining the short, somewhat revolute columella in a gentle, even curve. 

 Entire surface marked by faint wavy spiral striations. The specimen 

 figured has 10 post-nuclear whorls and measures: Length 6.0 mm., 

 diameter 1.8 mm. Another specimen from the same locality, which 

 has 12 post-nuclear whorls, but is minus the nucleus and probabl}^ the 

 first of the succeeding turns, measures: Length 9.2 mm., diameter 2.5 

 mm. 



This species resembles T. torquata Gould, but can easily be distin- 

 guished from it by its broader base, its large, partly immersed, slanting 

 nucleus, and the robust character of its whorls and ribs, the latter being 

 fewer and much broader; the intercostal spaces being comparatively 

 narrower. Doctor Baird's type was collected at Esquimalt Harbor, 

 Vancouver Island, British Columbia. 



Specimens examined. 



2. Kadiak Island, Alaska. 13 fathoms. W. H. Dall. Cat. No. 160489, U.S.N.M. 

 1. LituyaBay, Alaska. 8 fathoms. W. H. Dall. Cat. No. 160490, U.S.N.M. 



1. Port Etches, Alaska. W. H. Dall. Cat. No. 160993, U.S.N.M. 



4. Victoria, Vancouver Island, British Columbia. C. F. Newcombe, Cat. No. 



126670, U.S.N.M. 

 1. Puget Sound, Washington. Doctor Kennerley. Cat. No. 44938, U.S.N.M. 

 1. Monterey, California. 28 fathoms. S. S. Berry. In Mr. Berry's collection. 

 1. CarterBay, British Columbia. Rev. G. W. Taylor. Cat. No. 196184, U.S.N.M. 



1. Carter Bay, British Columbia. Rev. G. W. Taylor. Rev. G. W. Taylor col- 



lection. 



3. Port Simpson, British Columbia. Rev. G. W. Taylor. Cat. No. 196183, 



U.S.N.M. 

 11. Port Simpson, British Columbia. Rev. G. W. Taylor. Rev. G. W. Taylor 

 collection. 



2. West of Rose Spit, Queen Charlotte Island, British Columbia. Rev. G. W. 



Taylor. Rev. G. W. Taylor collection. 

 1. Alert Bay, British Columbia. Rev. G. W. Taylor. Rev. G. W. Taylor 

 collection. 

 20. Departure Bay, British Columbia. Rev. G. W. Taylor. Rev. G. W. Taylor 

 collection. 



5. Departure Bay, British Columbia. Rev. G. W. Taylor. Cat. No. 196185, 



U.S.N.M. 



