208 CALIFORNIA ACADEMY OF SCIENCES. 



178. Drillia pudica Hinds. 



Plate VIII, Fig. 13. 



Pleurotoma pudica Hds., Proc. Zool. Soc, 1843, p. 41; Voyage Sulphur, p. 20, PI. VI, fig. 11, 1844. 

 Cpr., Brit. Assn. Rept., 1856, p. 330. Tryon, Man. Conch., Vol. VI, p. 189, 

 Pi. XIII, fig. 55, 1884. 



Shell small, resembling D. torosa in general appearance; whorls seven, angular, convex 

 below, concave above, with twelve or thirteen transverse ribs, nearly all of which extend from suture 

 to suture, but less prominent on the concave surface; surface spirally sulcate; in other respects 

 similar to torosa. 



DimensioJis. — Long. 11 mm.; lat. 4 mm.; defl. 25 degrees. 



Distinguishable from I), torosa by the long transverse ribs, and by the more 

 convex outline of the whole shell. Specimen identified by Dr. Dall. 



Rare; one specimen from upper San Pedro series of San Pedro, which 

 is figured, and is now in the collection of Delos Arnold. 



Living. — Central America (Carpenler). 



Pleistocene. — San Pedro (Arnold). 



179. Drillia renaudi, sp. nov. 



Platk VIII, Fig. 5. 



Shell small, fusiform, turreted; apex blunt; whorls eight, sharply angular, with angle about 

 two-fifths distance from anterior margin of whorl; upper and lower surfaces flat; about fifteen oblique 

 nodes ornament the angle and extend down on the lower portion of the whorl, becoming obsolete 

 before reaching the suture; nodes obsolete on body-whorl; suture deeply impressed, distinct; 

 aperture short, elliptical, oblique; posterior sinus broad, shallow; anterior sinus long, straight; 

 columella incrusted within; body-whorl angular, ventricose, much produced and narrow below, 

 smooth, except for very faint incremental lines. 



Dimensions. — Long. 15.8 mm.; lat. 6 mm.; body-whorl 9 mm.; aperture, including canal, 

 7 mm.; canal 2 mm.; defl. 35 degrees. 



Different in shape from any other member of this genus found in these 

 deposits. Distinguishable by the smooth, ventricose body-whorl, sharply angulated 

 whorls, nodose angle, and long canal. This species has the long canal of D. perversa, 

 the angular whorls of Leucosyrinx pedroana, and the nodes, though less prominent, 

 of I), torosa. Specimens pronounced a new species by Dr. Dall. Named in 

 honor of Ralph E. Renaud, who has prepared many of the drawings which illustrate 

 this paper. 



Rare; one specimen from Pliocene and one (type) from lower San Pedro 

 series of Deadman Island. The specimen figured is the type, which is now in the 

 United States National Museum. 



Pleistocene. — San Pedro (Arnold). 



Pliocene. — San Pedro (Arnold). 



