CRETACEOUS FOSSILS. Ill 



CINULIA, Gray. 



Avellana, D'Orb. 

 C. OBLIQUA, n. s. 



PI. 19, Fig. 64, and 64 a, b, c. 



SHELL subglobose, obliquely truncated below; whorls four, 

 rounded; suture distinct. Surface ornamented by numerous 

 fine revolving ribs, with deep interspaces, which are divided into 

 minute, square compartments by cross-bars, which do not rise to 

 the level of the ribs. Outer lip heavy, smooth, a little notched, 

 or sinuous anteriorly. Columella coated by a heavy callus, 

 which unites at both ends with the lip, and bears a large fold 

 anteriorly, with a slight intumescence in advance of it. 



Figure 64, and 64 a, arc from the largest specimen I have seen; Fig. b is of 

 about the average size ; Fig. c shows the ornamentation of the surface. 



Localities: Tuscan Springs; Martinez; Pence's Ranch, above Oroville; Chico 

 Creek; and Texas Flat, Placer County (Division A.). Also, at Cottonwood Creek; 

 and in the Siskiyou Mountains, Siskiyou County. 



C. MATHEWSONII, n. s. 



PL 19, Fig. 65. 



SHELL ovoid; spire moderate; whorls four and a half, convex, 

 last one expanded ; suture impressed. Surface marked by rows 

 of minute punctations, with broader, somewhat elevated, flat 

 ribs between them. Outer lip broad, heavy, slightly sinuous, 

 longitudinally striate and slightly indented in advance, on the 

 oral aspect. Columellar incrustation heavy, continuous above 

 and below with the outer lip, and with three narrow, prominent, 

 equal folds. Length, .47 inch. 



Locality : From a compact, dark-green or gray limestone at Bull's Head Point, 

 Martinez (Division B.); collected by Mr. Mathewson. Also, from Orestimba 

 CaSon, Stanislaus County. 



