88 PALAEONTOLOGY OF CALIFORNIA. 



NEPTUNEA, Bolt. 



N". CURVIROSTRIS, 11. S. 

 PL 18, Fig. 37. 



Small, robust. Spire low; whorls six, rounded. Aperture 

 moderate, inner lip simple, outer lip acute, crenulated internally. 

 Canal long, broadly recurved. Suture distinct. Surface marked 

 by numerous revolving, impressed lines, finer above, becoming 

 more distinct below. One of these lines, immediately below the 

 suture, is much broader and deeper than the rest. Across these 

 lines are numerous, somewhat irregular, curved lines of growth. 



Usual length, about .8 inch, although one fragment before me 

 must have belonged to a specimen about 1.2 inch in length. 



Locality: Cow Creek, Shasta County (Div. A.). Collected by Messrs. Brewer 

 and Esmond. 



~H. PONDEROSA, n. S. 

 PL 18, Fig. 38. 



Thick, robust, spire high, whorls plane or slightly convex; 

 four or five in number; suture linear, more distinct as the shell 

 increases in size; undulated. Surface marked by a few large 

 ribs, varying in number and size on different specimens. These 

 ribs are crossed by numerous revolving lines, all of the same 

 size, on young specimens, but alternating irregularly on the 

 larger whorls. Aperture broad, rounded subquadrate; columella 

 slightly curved, outer lip straight, crenulate internally. Canal 

 short, having at the extremity an oblique groove, indicating a 

 rudimentary umbilicus, but entirely closed and very shallow. 



The figure is of about average size. The largest specimen I have seen is broken ; 

 but, were it perfect, it would have been about 1.8 inch in length. 



Localities: Tuscan Springs ("Lick Springs"), collected by Or. Vcatch ; and 

 Pence's Ranch, above Oroville, Butte County (Div. A.), collected by Prof. 

 Brewer. 



