1917] Noml-and: Fauna of the Santa Margarita Beds 



309 



length of shell from anterior end. Surface ornamented by a large 

 number of fine radiating ridges and well-developed growth lines. 

 Dimensions : Length, 52 mm. ; height, 22 mm. 



This species is much larger than the Kecent Septifer bifurcatus 

 Conrad, the radiating ridges are more numerous, and the umbonal 

 ridge is more marked. 



Occurrence. — At locality 2276, Santa Margarita, about ten miles 

 northeast of Coalinga. 



ACANTHINA (MONOCEEAS) NORNA, n. sp. 

 Plate 19, figures 3a, 36 

 Type specimen, no. 11314, in Univ. Calif. Coll. Invert. Palae., from locality 

 2276, on hill near SW corner of SE % of NE % sec. 10, T. 19 S, R. 15 E, M. D. 

 B. & M. 



Shell of medium size, fusiform, six or seven whorls, spire elevated, 

 with distinctly appressed suture and a slight constriction on each 

 whorl a short distance below. Body whorl slightly flattened on sides 

 with rather acute angulation at shoulder; ornamented below angula- 

 tion by about eleven well-developed spiral cords between each pair 

 of which occurs a small spiral line ; at the shoulder a slight nodosity 

 is evident. Whorls of spire with about five spiral ribs between each 

 pair of which is a riblet ; with about twelve well-developed axial ribs 

 which become smaller at lower part of whorls. Aperture narrow 

 elliptical ; outer lip thickened, dentate ; inner lip incrusted, slightly 

 flattened ; canal curved, of medium length. Dimensions : Height, 41 

 mm. ; maximum diameter, 20 mm. 



Occurrence. — At locality 2276, about ten miles northeast of 

 Coalinga, Fresno County ; Santa Margarita. At the type locality this 

 species occurs with the following Santa Margarita forms : Amiantis 

 communis, n. sp. ; Chione semiplicata, n. sp. ; Periploma clarki, n. sp. ; 

 Septifer margaritana, n. sp. ; Tcejula thea, n. sp. ; Tegula varistriata, 

 n. sp. 



FUSINUS FABULATOR, n. sp. 

 Plate 20, figure 10 



Type decollete and broken specimen, no. 11319, in Univ. Calif. Coll. Invert. 

 Palae., from locality 3029, near western boundary of sec. 13, T. 32 S, R. 29 E, 

 M. D. B. & M., Tejon Hills, Caliente quadrangle, Kern County. Collected by 

 R. C. Stoner. 



Shell of medium size, fusiform, elongate, about five or six whorls, 

 with a little increased convexity at shoulder ; suture slightly appressed. 



