CRETACEOUS FOSSILS. 95 



T. Diegoexsis, n. 8. 



PI. 18, Fig. 44. 



Shell fusiform, robust; whorls five or six, convex; spire about 

 as long as the aperture. Surface ornamented by sinuous, rounded, 

 longitudinal ribs, which extend almost entirely across the body 

 volution, and by fine, revolving, linear ribs, which cover the 

 whole surface. Aperture rounded, wide; columella slightly 

 curved ; lip but slightly emarginated anteriorly. The varices are 

 few and small. 



Length, .55 inch. 



In shape and markings this species resembles Neptunea perforata ; but the spire- 

 is higher, the whorls less prominently convex, the longitudinal ribs much longer, 

 less prominent and sinuous ; while in that species they are nearly straight and 

 much more oblique. In this species the columella is thicker and curved, instead 

 of straight as in N. perforata, and the umbilical depression is absent. 



Locality : San Diego (Division B.). Collected by Dr. Cooper. 



T. PAUCIVARICATUM, 11. S. 

 PI. 28, Fig. 209, and 209 a. 



Shell short, robust; spire elevated, whorls six, convex, con- 

 vexly truncated above ; mouth broad, outer lip crenulated inter- 

 nally; inner lip incrusted, recurved, and dentate anteriorly. Su- 

 ture deep. Surface. marked by numerous small, longitudinal ribs, 

 very oblique above, more transverse below ; these are crossed 

 by numerous, alternating, revolving lines. 



Varices large, but few. 



Length, .G inch. 



This shell is of nearly the same Bize and Bhape as Neptunea perforata. It can be 

 distinguished, however, even in weathered specimens, by the more numerous and 

 finer ribs, the presence of varices, and the curved columella. Prom T. Diegoerms 

 it is sufficiently separated by the smaller and more numerous ribs, the more convex 



whorls, and the deeper suture. 



/.. cality: Alizos Creek, near Fort Tejon (Division B.) 



