194 CADULUS-GADILA. 



widest part. Aperture oblique, and (measured obliquely) a trifle 

 longer than wide (in the ratio of 35 : 33) ; lip thin, sharp. Anal 

 orifice circular and simple. 



Length 10*37 mill.; antero-posterior diameter at aperture I'O, at 

 widest 1*14, at apex 0*37 mill.; greatest transverse diameter 1*17 

 mill. 



San Pedro, California (J. G. Cooper) ; fossil in well at San Diego, 

 Cal., at 150 ft. depth (Hemphill). 



O. fusiformis " Phil.," COOPER in U. S. National Museum, and 

 HEMPHILL in collection Acad. Nat. Sci. Phila. 



Closely allied to C. hepburni Dall and C. aberrans Whiteaves ; 

 but it is decidedly slenderer than the first, and less curved than the 

 other of these species. The type is a specimen collected alive, No. 

 133,809, U. S. Nat. Mus. ; other and fossil specimens from a San 

 Diego well (Pliocene) have been collected by Henry Hemphill. 

 The specific name " fusiformis Phil." seems to have obtained cur- 

 rency on the West Coast, but we have been unable to find it in 

 Philippi's writings, or, in fact, in any printed work. There is also 

 a dead shell, perhaps Pliocene, in the U. S. Nat. Mus., with the name 

 i( C. intentior Cpr.," identical with this species. 



C. HEPBURNI Dall. PI. 35, figs. 19, 20. 



Shell slightly arcuate, the latter half nearly straight, narrow, the 

 greatest diameter contained about 7 times in the length of the shell ; 

 calibre gradually increasing from the apex to within about a milli- 

 meter of the aperture, then quite perceptibly contracting. A trifle 

 compressed between the concave and convex sides. Surface polished, 

 smooth, white. Apertures subcircular, their margins simple. 



Length 10 mill. ; antero-posterior diam. at aperture I'll, at great- 

 est T33, at apex 0*45 mill. ; lateral diam. at aperture 1*23, at great- 

 est 1*4, at apex 0'5 mill. 



Type measures: length of shell, 11; diameter at anterior end, 

 1'25 ; at posterior end. 0*75 mill. 



Near Victoria, Vancouver Island, in 60 fms. (Nat. Hist. Soc. of 

 British Columbia). 



Cadulus hepburni DALL, Nat. Hist. Soc. Brit. Columbia, Bull. No. 

 2, p. 12, pi. l,f. 13 (1897). 



The contraction toward the aperture is very slight, and mainly 

 confined to the covex side. The surface is eroded near the apex in 

 all the specimens collected, so the measurements of apex are approxi- 



