278 University of California Publications in Geology [Vol. 7 



Several specimens were found at University of California 

 Locality 1853. 



Dimensions: Length, 16mm; width of body-whorl, 6.5mm. 



SUECULA CLAEKI, n.sp. 

 Plate 11, figure 3 



Shell, fusiform with eight ( ?) whorls, the body -whorl being 

 almost as long as spire. The whorls are marked by eight elongated 

 rounded nodes crossed by revolving lines. Four or five revolving 

 lines occur between the suture and the angle of the whorl. The 

 angle of the whorl is marked by a strong revolving rib. Another 

 strong rib occurs just below the angle and two weaker ribs are 

 found on the space below. A moderately deep sinus is indicated 

 by the lines of growth above the angle. Mouth, elongate, oval ; 

 canal, short. 



University of California Locality 1853. Named in honor of 

 Bruce L. Clark, Instructor in Palaeontology, University of 

 California. 



This species resembles Pleurotoma guibersoni Arnold, but it 

 has more nodes on its whorls, the revolving lines are different and 

 the lines of growth indicate without a doubt a sinus above the 

 angle. 



Dimensions : Length, 10mm ; width, 4.5mm. 



SURCULA CRENATOSPIEA Cooper 

 Plate 11, figure 4 



Surcula crenatospira. — Cooper, J. G., Catalogue of California Fossils, 

 Bull. 4, California State Mining Bureau, p. 39. 1894. 



"Nuelear whorls three, smooth, large, the apical, immersed; other 

 spiral whorls five, turreted, gradually enlarging, each with about nine 

 rounded tubercles horizontally flattened, forming a chain around the 

 middle, and connected by two strong revolving ribs, making a sharp 

 angle. Above this are five or six fainter ribs, crossed by strong sinu- 

 ated lines of growth, and below a similar sculpture, the whole surface 

 being thus divided by strong reticulations, extending forward on body- 

 whorl about half its length. Mouth simple, sinus moderate, above angle, 

 canal long, straight, aperture as long as spire. Length, about 1.75 inch; 

 breadth, 0.80; mouth and canal, 1 inch long, 0.40 wide. 



Not very near any of Gabb 's species of the family, except in the long 

 canal, which seems to have been more common in the fossil than in living 

 Pleurotomidae. The character of the sinus and sculpture ally this and 



