228 CALIFORNIA ACADEMY OF SCIENCES. 



212. Chrysodomus rectirostris Carpenter. 



Plate VII, Fig. 7. 



Chrysodomus rectirostris Qvv.., Brit. Assn. Rept., 1863, p. 664; Proc. Phil. Acad. Nat. Sci., 1865, 

 p. 64. Tryon, Man. Conch., Vol. II, p. 131, PL LIII, fig. 348, 1881. 



Shell small, turreted, slender; apex acute; whorls nine or ten, slightly conve.x, with about 

 fourteen rounded, transverse ridges reaching from suture to suture; ridges follow direction of lines of 

 growth, which are convex anteriorly; spiral sculpture consists of numerous fine furrows; suture 

 impressed, distinct; body-whorl slightly angulated at base; aperture elliptical; outer lip thin, bulging 

 above canal; inner lip smooth, incrusted; columella long, straight, narrow, smooth on inner part; 

 canal long, straight, narrow. 



Dimensio7is. — Long. 28 mm.; lat. 7 mm.; body-whorl 14.5 mm.; aperture, including canal, 

 1 1.5 mm.; canal 5 mm.; defl. 22 degrees. 



This species looks something like a Pleurotoma, but may be distinguished by 

 the straight canal and almost flat whorls. Carpenter's description in the British 

 Association Report for 1863 is misleading. In describing this species he says the 

 shell is "small, white, smooth, with straight canal." Why he uses "smooth" in 

 describing such a decidedly sculptured form is not easy to understand. Sevei'al 

 specimens of this species were identified from Carpenter's type by Dr. Dall. 



Rare in the Pliocene and lower San Pedro series at Deadman Island, and in 

 the upper San Pedro series at Crawfish George's. The specimen figured is from the 

 lower San Pedro series at Deadman Island, and is now in the collection of Delos 

 Arnold. 



Living. — Puget Sound (Carpenter). 



Pleistocene. — San Pedro (Arnold). 



213. Chrysodomus tabulatus Baird. 



Plate VII, Fig. 0. 



Chrysodomus tabulatus Baird, Proc. Zool. Soc, 1863, p. 66. Cpr., Brit. Assn. Rept., 1863, p. 663; 



Nat. in British Columbia, Vol. II, p. 356. Cooper, 7th Ann. Rept. Cal. St. Min., 



1888, p. 235. 

 Neptwiea tabulaia "Qmrd, GAYiv,, Pal. Cal., Vol. II, p. 71, 1869. Tryon, Man. Conch. , Vol. II, 



p. 121, PL XLIX, fig. 286, 1881. 



Shell large, fusiform; spire elevated; apex subacute; whorls eight, sharply angulated and 

 keeled above, forming a rimmed, spiral table; surface ornamented with revolving ridges of alternating 

 size; suture very deeply impressed; aperture pyriform; outer lip thin, smooth; inner lip incrusted; 

 canal long, narrow, curved backwards; columella twisted, spirally ridged. 



Dimensions. — Long. 80 mm.; lat. 34 mm.; body-whorl 55 mm.; aperture, including canal, 

 42 mm.; canal 19 mm.; defl. 44 degrees. 



Rather common in Pliocene; rare in lower San Pedro series of Deadman 

 Island and San Pedro. Found also in the Pleintocene at the bluflf west of the bath- 

 bouse, Santa Barbara, and at the old irrigating ditch north of Ventura. The 



