CRETACEOUS FOSSILS. 123 



This shell is of the same size as C. Remondil but can be at once distinguished 

 by its low spire, the absence of tubercles on the whorls, and the acute, channelled 

 angle. I have not seen it from any other locality than the one above quoted, 

 where it does not appear to be very rare. 



C. sinuatus, n. s. 



PI. 29, Fig. 227. 



Shell moderate in size, subfusiform; spire elevated, turretcd; 

 whorls five or more, angular, concave above, and strongly 

 sinuated below; suture channelled, the upper margin of the 

 whorl bearing a fine thread-like groove, similar to that on the 

 angle of the whorl of the preceding species; upper surface of 

 the whorls finely striate, the angle minutely crenulated or plain; 

 anterior portion of body whorl (as much as is known) marked by 

 a few pretty distinct revolving lines. 



Figure, natural size. 



Locality: A single, imperfect specimen was found by Dr. Ilorn, near Fort 

 Tejon. The anterior fourth of the shell is gone, and the lines of growth arc too 

 indistinct to ascertain the exact shape of the missing portion. The curved whorl 

 and the elevated, turreted spire will distinguish this very peculiar species. 



ROSTELLARIA, Lam. Gladius, Klein. 

 Subgex. RIMELLA, Agas. 



R. CANALLFERA, U. S. 

 PI. 29, Fig. 228. 



Shell small, unequally fusiform; spire elevated, longer than 

 the mouth; whorls six or seven, convex; suture deep. Aperture 

 long, rather narrow, oblique, acute behind, and broadly and 

 obliquely emarginate in front; the posterior angle of the mouth 

 is continued in a deep, narrow canal, slightly curved, along the 

 spire to the apex; anterior canal broad, strongly curved upwards; 

 outer lip thickened along its whole extent, but most strongly so 

 above; inner lip incrusted by a callus, which extends posteriorly, 



