1917] Nomland: Fauna of the Santa Margarita Beds 311 



base is narrower ; between these are wide interspaces, the lower being 

 of less width ; both ridges and interspaces covered by nine or ten 

 spiral threads, of which the one at the shoulder and the two at the 

 base are wider and more prominent; above the shoulder are about 

 five equal spiral lines ; the oblique incremental lines crossing the 

 spirals give the surface a slight nodose appearance. Base of body 

 whorl convex, sculptured by about ten distinct concentric lines, which 

 in general become finer away from the center. Aperture subcircular; 

 outer lip rather thick ; on inner lip is small tubercle ; umbilicus open. 

 Dimensions: Height, 16 mm.; maximum diametear, 22 mm. 



Occurrence.— At localities 2268, 2275, 2276, 2279, 2283; Santa 

 Margarita. 



TEGULA VARISTEIATA, n. sp. 

 Plate 20, figures 4a, 4b 

 Type in Univ. Calif. Coll. Invert. Palae., no. 11316, from locality 2268, along 

 side of canon, SW corner of NE % of NE % sec. 15, T. 19 S, E. 15 E, M. D. 

 B. & M., about nine miles northeast of Coalinga, Fresno County. 



Shell conical, sides and upper part of whorls convex, about five 

 whorls, with a slight shoulder on some specimens. Body whorl sculp- 

 tured by about fifteen approximately equal spiral lines with narrower 

 interspaces ; oblique incremental lines intersecting spirals give a 

 nodose appearance. Base of body whorl convex ; ornamented by about 

 eleven approximately equal concentric nodose lines. Aperture sub- 

 ovate ; inner lip with small tooth or tubercle ; umbilicus open. Dimen- 

 sions of type : Height, 20 mm. ; diameter, 21 mm. 



In some respects this species resembles closely Tegula thea, n. sp. 

 It may be distinguished from that form by the nearly uniform con- 

 vexity and the lack of the three prominent ridges on the sides of the 

 whorls. 



Occurrence. — In the Santa Margarita at localities 2268, 2276, 

 2282. 



TKOPHON PERELEGANS, n. sp. 

 Plate 20, figures 1, 2, 3 

 Type specimen, no. 11321, in Coll. Vert. Palae. of Calif. Acad. Sci., San 

 Francisco; from near Graham oil well, western boundary sec. 2, T. 19 S, R. 15 E, 

 M. D. B. & M., about eleven miles northeast of Coalinga, Fresno County. 



Shell of medium size ; spire rather high ; whorls about six ; suture 

 indistinctly appressed. Whorls with slight angle on each whorl, a 

 little below the suture, above which the surface is gently convex ; 

 ornamented by about eleven thin axial varices which become spinose 



