1916] 



Nomland: Fauna from the Lower Pliocene 



205 



Occurrence. — Type specimen from University of California locality 

 2523, on low hill immediately north of road from Alcalde to Eobert's 

 ranch, SE y 4 , see. 27, T. 21 S, R. 14 E, M. D. B. & M. 



Associated with this form at the type locality are, among others, 

 Monia macroschisma. Deshayes, Pecten estrellanus Conrad var. termi- 

 nus Arnold, Pecten oweni Arnold, Phacoides anmdatus Reeve. 



CHEYSODOMUS COALINGENSIS, n. sp. 

 Plate 10, figure 3 



Shell fusiform, slender, seven or more whorls, spire high and acute. 

 Axially sculptured with sharp longitudinal ribs extending from 

 shoulder nearly to suture. Penultimate whorl with eleven ribs ; on 

 the body whorl axial ribs almost absent. Spiral sculpture on the 

 upper whorls consisting of about seven prominent, nearly equal ribs 

 with interspaces less than tops of ribs. Aperture narrow. Canal 

 long, straight, thickened at base. Body whorl subangulate at shoulder, 

 with side of whorl slightly convex, ornamented with about seventeen 

 spiral ribs. Dimensions of type : height, 48 mm. ; width, 17 mm. 



This species may be easily distinguished from other members of 

 the same genus by its slenderness, the high spire, and the long canal 

 which widens near the base. 



Occurrence. — University of California locality 2670, near top of 

 1600-foot hill, NW % sec. 34, T. 21 S, R. 14 E, M. D. B. & M. 



FISSUKIDEA SUBELLIPTICA, n. sp. 

 Plate 10, figures 5a, 5b 



Shell subelliptical, moderately elevated, gently convex, apex 

 slightly anterior. Radially sculptured by numerous equal ribs. On 

 type specimen concentric growth lines prominent, some more devel- 

 oped than others. Apical orifice large, elliptical, anterior to apex. 

 Dimensions of type: height, 24 mm.; maximum diameter. 56 mm.; 

 minimum diameter, 46 mm. 



Occurrence. — University of California locality 2664, NE corner of 

 NW % sec. 34, T. 21 S, R, 14 E, M. D. B. & M. 



At the type locality this species occurs with the following charac- 

 teristic lower Pliocene species: Phacoides anmdatus (Reeve), Pecten 

 oweni Arnold, Cancellaria, cf. tritonidea Gabb, Chrysodomus porto- 

 laensis Arnold, Turris (BatJiytoma) coaling ensis (Arnold). Turritella 

 nova, n. sp. 



