WEST AMERICAN PYRAMIDELLID MOLLUSKS. 69 



broad, almost double the width of the ribs. Sutures stronoily 

 impressed. Periphery and base of the last whorl well rounded, 

 marked by the continuations of the axial ribs which extend feebly 

 to the umbilical region. Entire surface marked by numerous 

 closely placed spiral striations. Aperture pyriform, posterior angle 

 acute, columella almost straight, obliquely inserted, slightly revolute. 

 The unique type (Cat. no. 196221, U.S.X.M.) was collected by 

 Rev. G. W. Taylor at Banks Island, British Columbia. It has 9 

 post-nuclear turns and measures: Length 5.7 mm., diameter 1.4 mm. 



TURBONILLA (PYRGOLAMPROS) BERRYI Dall and Bartsch. 



Plate 6, figs. 5, 5a. 



Turbonilla (Pyrgolampros) berryi Dall and Bartsch, Proc. U. S. Nat. Mus., vol. 

 33, 1907, p. 500, pi. 44, figs. 10, 10a. 



Shell slender, very regularly acutely conic, bright chestnut-brown, 

 with two narrow spiral bands of a lighter shade; one, the narrower of 

 the two, is at the periphery, the other has its posterior edge at about 

 the middle of the exposed portion between the sutures. Nuclear 

 turns two and one-fourth, smooth, depressed, helicoid, not immersed, 

 having their axis at a right angle to the axis of the later whorls, their 

 sides projecting slightly beyond the outlines of the spire. Post- 

 nuclear whorls very high between the sutures, slightly beveled at the 

 summit and moderately constricted at the periphery, ornamented by 

 well-developed, acute, retractive axial ribs, of which there are about 

 20 upon the second, 24 upon the fifth, and 26 upon the penultimate 

 turn. These ribs extend quite strongly to the summit, where they 

 feebly crenulatc tlie well-impressed sutures. Periphery and base of 

 the last whorl well rounded, marked by the continuations of the axial 

 ribs, which gradually disappear as they cross the base. Entire sur- 

 face marked by numerous very fine, closely spaced, wavy, spiral 

 striation. Aperture suboval, somewhat effuse anteriorly; posterior 

 angle acute; columella oblique, very slightly twisted and weakly 

 revolute at its outer extremity. 



The type (Cat. no. 196223, U.S.N.M.) has 9 post-nuclear whorls 

 and measures: Length 8 mm., diameter 2.2 mm. It and another 

 specimen in Mr. S. S. Berry's collection were dredged by him in 39 

 fathoms on sandy bottom in Monterey Bay. 



Another specimen (Cat. no. 196225, U.S.N.M.) was dredged by the 

 Bureau of Fisheries steamer Albatross, at station 4564, in 9 to 10 

 fathoms, rocky bottom, with a temperature of 59°, 2 miles off Santa 

 Cruz Light, Monterey Bay, California. 



A fourth shell (Cat. no. 196224, U.S.N.M.) was dredged in 52 

 fathoms, off Catalina Island, California. 

 2565— Bull. 68—09 6 



