N0.1574. WEST AMERICAN PYRAMIDELLIV.'E—DALL AND BARTSCH. 505 



depressed helicoid spire whose axis is at right angles to the axis of 

 the succeeding turn; not immersed and extending slightly beyond the 

 outline of the spire on both sides. Post-nuclear whorls very slightly 

 rounded, weakly roundly shouldered at the summit and very moder- 

 ately contracted at the periphery, ornamented by very strong, broad, 

 low, rounded, almost vertical axial ril)s of which there are 22 upon 

 the first, 24 upon the antepenultimate, and 28 upon the penultimate 

 turn. These ribs extend prominent!}' to the smnmit and crenulatethe 

 subchannelled sutures. Intercostal spaces narrow, not more than 

 half the width of the ribs, crossed b}' 19 incised spiral lines which are 

 of almost equal width and subequally spaced with the following excep- 

 tions, the seventh, (deventh, and the last three above the periphery are 

 much wider, appearing as quadrangular pits in the intercostal spaces, 

 the eleventh falling on about the middle of the exposed portion of the 

 whorl on the spire, and the seventh about halfway between this and 

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

 latter marked ])y the feeble continuations of the axial ribs which grad- 

 ually disappear after crossing the peripher}-, and about 16 subequally 

 spaced incised spiral lines. Aperture oval, somewhat effuse ante- 

 riorly, columella ol)lique, somewhat twisted with a weak oblique fold 

 a little anterior to its insertion. 



The type (Cat. No. 196229, U.S.N.M.) was dredged l)y Mr. S. S. 

 Berry in 12 fathoms off Del Monte, Monterey, California. It has 10 

 post-nuclear whorls and measures: Length 6.3 mm., diameter 1.2 mm. 



TURBONILLA (PYRGISCUS) MORCHI, new species. 



Plate XLV, figs. 1, la. 



Shell broadly elongate-conic, the posterior third of the exposed 

 portion of the whorls on the spire and a narrow area about the 

 umbilical region flesh-colored, the rest of the shell light chestnut 

 brown. Nuclear whorls 2i, small, smooth, forming a depressed heli- 

 coid spire which has its axis at right angles to the axis of the succeed- 

 ing turns and is about one-fifth immersed in the first of them. Exposed 

 portion of the post-nuclear whorls flattened in the middle, posterior 

 fourth sloping- genth' toward the summit, which is closel}' appressed 

 to the preceding turn; the anterior portion slopes more abruptly, 

 roundly toward the periphery. The whorls are ornamented by strong 

 rather distantly spaced, moderately acute, slightly protractive axial 

 ribs, of which 18 occur upon the first three, 16 on the next three, 18 

 on the seventh, and 20 upon the penultimate turn. The ribs weaken 

 slightly and become somewhat flattened as they approach the con- 

 stricted sutures. Intercostal spaces broad, almost double the width 

 of the ribs, crossed by 7, equal and equall}' spaced, deepl}' incised 

 spiral lines, which extend up on the sides of the ribs and feebly across 



