164 



University of California Publications in Geology [Vol. ll 



type as Turbonilla (Pyrogiscus) grippi Bartsch, 136 a Recent West 

 Coast species. The ribs of the former are a little heavier and possibly 

 the body whorl is a little more ventricose. 



Family Epitonidae 

 Genus EPITONIUM Bolten 

 EPITONIUM PINOLENSIS, n. sp. 

 Plate 20, figure 16 

 Type specimen 11273, Coll. Invert. Palae. Univ. Calif., loc. 3055 

 Shell medium in size, turreted ; apex acute ; whorls strongly and regularly 

 convex; sutures strongly depressed; number of whorls seven or eight. Surface 

 eonvered by about twenty-five to twenty-eight fine, longitudinal ribs, with inter- 

 spaces somewhat wider than the width of the ribs; surface of each whorl also 

 sculptured by about six spiral ribs, with interspaces nearly twice the width of 

 the ribs; body whorl rounded at junction of side to base; on the type specimen 

 the posterior two or three spiral ribs are nearly obsolete. Aperture not exposed. 

 Occurrence. — University of California localities 3051 and 3055. 



EPITONIUM VENTEICOSUM, n. sp. 

 Plate 23, figure 14 

 Type specimen 11240, Coll. Invert. Palae. Univ. Calif., loc. 165 

 Shell large, with six or seven whorls which are strongly and regularly convex ; 

 sutures depressed. Spire high, acute ; body whorl strongly ventricose, about half 

 the height of the shell. Surface sculptured by about twelve heavy, rounded, con- 

 tinuous varices. Base of body whorl broad, depressed in umbilical region. Aper- 

 ture covered by matrix. 



Dimensions. — Type specimen: height, about 45 mm.; height of body whorl, 

 22 mm. ; greatest diameter of body whorl, 31 mm. 



This species appears to be quite unique, the body whorl being 

 larger and more ventricose than on any of the Recent or fossil species 

 of the same genus on this coast. The type is a wax mould taken from 

 a very well preserved impression in the rock. 



EPITONIUM, sp. indt, 

 Plate 21, figure 8 



Shell medium in size ; apex acute ; whorls regularly convex, seven or eight 

 in number ; sutures depressed, apparently a fairly well-marked sutural band at 

 the base of each whorl. Surface covered by about twelve distinct rounded varices, 

 with interspaces averaging about as wide as the varices. On the penultimate 

 whorls of the spire of the type, four or five spiral ribs can be discerned between 

 the varices ; undoubtedly the whole surface of the shell was covered by spiral ribs. 

 Aperture not exposed. 



The specimen figured is a wax cast from University of California locality 3055. 



136 For original description of Turbonilla grippi, see Proc. U. S. Nat. Mus., 

 vol. 42, p. 270, pi. 36, fig. 9, 1912. 



