146 PALAEONTOLOGY OF CALIFORNIA. 



Length, 1.15 inch -J- 5 width, .6 inch. The total length of a perfect specimen 

 would probably be about 1.4 inch. 



Very rare. A single specimen from the Martinez Group, at Martinez ; Coll. by 

 Mr. Mathewson. 



This shell is allied to F. Martinez, but differs in the more narrowly tumid char 

 acter of the whorls, and the fewer longitudinal ribs. F. Martinez, so far as known, 

 is characteristic of the Tejon Group. 



F. OCCIDENTALIS, n. S. 

 PI. 26, Fig. 23. 



SHELL small, robustly fusiform ; spire moderately elevated, tur- 

 riculated ; whorls five, augulated, sloping straight above, body 

 whorl slightly convex below. Aperture broad, angulated pos 

 teriorly, produced in a narrow canal in front; outer lip simple, 

 inner lip incrusted. Surface marked by about thirteen or four 

 teen small nodes on the angle of the whorls, and by numerous 

 revolving ribs, about six or seven above the angle, and from six 

 teen to twenty below, two or three of which are larger than the 

 others. 



Length of broken specimen, .6 inch; total length, about .7 inch; width of 

 body whorl, .45 inch ; width of aperture, .2 inch. "With the preceding. 



NEPTUNEA, Bolt. 



S. G. Tritonofusus, Beck. 

 (Atractus, Ag. preoc.} 



!N". (T.) CRETACEA, II. S. 

 PI. 26, Fig. 24. 



SHELL thin, short, rounded fusiform ; spire low, whorls five, 

 rounded. Aperture broad, angulated behind, produced into a 

 curved canal anteriorly; outer lip simple, thin, columella curved, 

 excavated in the middle. Surface smooth, or if sculptured, carry 

 ing only very minute markings. 



