54 University of California Publications in Geology [Vol. 10 



Dimensions. — Longitude, 8 mm. ; latitude, 3.6 mm. 



The number of whorls and the enlongate, narrow canal serve to 

 distinguish this species from its nearest relative, C. gausapata, which 

 also occurs in some abundance in the material. Crenulations on the 

 outer lip are absent in all the specimens, hence some doubt is enter- 

 tained in placing the form in the subgenus Astyris. 



A dozen or more individuals were found, several of which are 

 perfectly preserved. Many of the shells show a fine polish. 



TUREIS (DRILLA) MODESTUS, n.sp., 

 Plate 1, Figure 8 



Univ. Calif. Coll. Invert. Palaeont., no. 11080. Type locality, Fourth and 

 Broadway, Los Angeles. 



Shell very small, conical, turreted, with elevated spire ; lateral out- 

 line very slightly concave. There are seven conical whorls, each 

 bearing near the base a faint double angulation determined by two 

 heavy spiral ribs which appear nodose from the intersection of an 

 equally developed set of transverse ribs. The body-whorl is orna- 

 mented with twelve distinct but not prominent spiral ribs below the 

 lower angulation and extending well out on the canal ; two ribs of 

 intermediate prominence appear above the upper angulation ; the 

 transverse sculpture consists of sixteen equidistant, equally developed, 

 slightly obliquely directed longitudinal ribs, which are obsolete on 

 the last three spiral whorls. The suture is rather conspicuously 

 depressed. Aperture elliptical ; outer lip unknown ; inner lip incrusted, 

 smooth. The canal is of moderate length, narrow and slightly 

 recurved. 



Dimensions. — Longitude. 5.2 mm.; latitude, 1.9 mm.; apical angle, 

 20 degrees. 



The size, shape and ornamentation of this species serve to separate 

 it from other known members of the Turritidae. 



One specimen only was found, from which the peristome had un- 

 fortunately been broken. 



BORSONIA INCULTA, n.sp. 

 Plate 1, Figures 2a, 2b 

 Univ. Calif. Coll. Invert. Palaeont., no. 11081. Type locality, Fourth and 

 Broadway, Los Angeles. 



Shell small, turreted, broadly fusiform, with a moderately elevated 

 spire. Six whorls appear, each bearing a double angulation of which 



