200 ALLAN HANCOCK PACIFIC EXPEDITIONS VOL. 2 



irregular; interspaces shallow, about as wide as the ribs, marked with 

 numerous spiral series of fine, narrow pits, of which 2, one near the 

 base of the whorls and the other a little above the middle of the whorls, 

 are wider than the rest ; periphery of the last whorl well rounded ; base 

 moderately long, the upper part marked by feeble continuations of the 

 axial ribs between which the spiral sculpture is continued as pits, while 

 on the lower part the pits are joined to form incised spiral lines; aper- 

 ture oval, outer lip thin, showing the external sculpture within ; colu- 

 mella curved. The tj^pe measures : length, 3.0 mm ; diameter, 0.7 mm. 



Holotype: No. 758 (Calif. Acad. Sci. Paleo. Type Coll.), from 

 Loc. 27,229 (C.A.S.), dredged in from 3 to 9 fms. in Bahia Honda, 

 Panama. L. G. Hertlein collector. Twenty-three additional specimens 

 were dredged at the same locality, and 7 specimens from Loc. 27,228 

 (C.A.S.), off Taboga Island, Panama. 



In the key given by Dall and Bartsch to the west coast species in 

 the subgenus Pyrgiscus,^^ the new species stonei would follow shimeki, 

 a species described from the Galapagos Islands which it resembles in 

 general appearance, but from which it differs in the smaller size, lack 

 of color bands, and more numerous axial ribs. 



This species is named for Mr. George Stone, who accompanied the 

 expedition as photographer, and who assisted in the collection of many 

 specimens of shells. 



Turbonilla (Pyrgiscus) crickmayi Strong & Hertlein, new species 



Plate 19, Fig. 10 



Shell elongate-conic, white; nuclear whorls 2^^, forming a slightly 

 elevated helicoid spire, with the axis at right angles to the following 

 whorls, in the first of which it is about one third immersed ; postnuclear 

 whorls 6, moderately rounded, sutures impressed; axial sculpture of 16 

 lamellar ribs which terminate sharply at the summit, giving the whorls 

 a tabulated appearance; interspaces about three times as wide as the 

 ribs, marked with 8 spiral series of narrow pits; peripherj' of last whorl 

 rounded, base rather long, marked with continuations of the axial ribs 

 which extend feebly to the umbilical region, and 6 spiral series of pits, 

 of which the one at the periphery is much the strongest; aperture oval, 

 outer lip thin; columella curved. The type measures: length, 3.0 mm; 

 diameter, 1.1 mm. 



31 Dall, W. H., and Bartsch, P., U. S. Nat. Mus., Bull. 68, 1909, pp. 74, 75, 

 76. 



