156 PALAEONTOLOGY OF CALIFORNIA. 



acteristic of that genus ; it also resembles some of the forms of Bullia, especially 

 in the sub-genus Buccinanops, but the form of the aperture will at once distinguish 

 them. 



B. liratus, Gabb. 



(Buccinum liratum, Gabb; Pal. Cal., Vol. 1, p. 96, pi. 28, fig. 211.) 



B. sinuatus, n. s. 



PL 26, Fig. 35. 



Shell short, thick, subovate; spire low, whorls four to four 

 and a half, almost entirely hidden, except on their upper margin; 

 suture variable, sometimes deep and bordered by a thickening 

 of the succeeding whorl, sometimes almost linear; body whorl 

 swollen in the middle, and marked by sinuous longitudinal lines 

 of growth, and in some specimens by undulations of the same 

 form ; on the anterior part of the shell are a few minute revolv- 

 ing lines. Aperture broad in the middle, acute behind, narrowed 

 in front, and deeply and narrowly notched; a rib revolves back- 

 wards from this notch around the anterior portiou of the shell, 

 occupying the former position of the notch at the successive 

 stages of growth ; outer lip simple, slightly sinuous in outline ; 

 inner lip heavily incrusted. 



Length, 1.4 inch ; width of body whorl, .9 inch ; length of aperture, 1.1 inch. 



A very variable shell, both in the height of the spire and in the intensity of the 

 surface markings. Some specimens are perfectly smooth except for the revolving 

 lines, while others are strongly costate by well marked but irregular sinuous longi- 

 tudinal ribs produced by irregular growth. 



From the Tejon Group, Martinez ; found over a small area, but apparently 

 common, where they do occur ; all the specimens were obtained by Mr. Mathewson. 



BULLIA, Gray. 



Molopophorus, N. Sub-Gen. 



Short, robust, spire moderately elevated, suture bordered by a 

 more or less distinct carina. Surface longitudinally ribbed or 



