1917] Nomland: The Etchegoin Pliocene of Middle California 235 



TEGULA (CHLOEOSTOMA) PULCELLA, n. sp. 

 Plate 12, figures 3, 3a 

 Type specimen no. 11101, Univ. Calif. Coll. Invert. Palae. 



Shell conical, thin, with about six whorls ; suture distinct, ap- 

 pressed. Sides of whorls fiat, giving an almost uniform slope from 

 apex to base. Surface striated by faint, oblique, incremental lines 

 and numerous low, rounded, axial riblets; on the sides of the whorls 

 near the base are about three fine spiral threads. Base of body- whorl 

 flattish, with sharp angle at periphery ; ornamented by incremental 

 lines and two or three nearly obsolete spirals around umbilical area. 

 Aperture subquadrate, with thin outer lip ; inner lip with two small 

 tubercles, of which the lower is almost invisible. Umbilicus open ; 

 outer edge of umbilical area limited by a distinct, sharp ridge. Height, 

 23 mm. ; diameter of slightly deformed type, 26 mm. 



This species is easily recognized by its flat sides, conical form, and 

 low axial ornamentation. 



Occurrence. — At locality 2991, with a large fauna of the Pecten 

 coalingensis zone, upper Etchegoin. 



CHEYSODOMUS PACKAEDI, n. sp. 



Plate 12, figures 4, 4a, ib 

 Type specimen no. 11096, Univ. Calif. Coll. Invert. Palae. 



Shell thick, has about four or five rapidly increasing whorls, with 

 distinct, appressed suture. Whorls slightly convex, tabulate, almost 

 channeled above. Surface of whorls ornamented by coarse, square, 

 spiral ribs, between which are fine thread-like intercalates and narrow 

 interspaces ; on body-whorl and continuing nearly to lower end of 

 canal there are about nine and on the whorls of spire three of these 

 major spirals. Crossing the whorls, and especially evident on spire, 

 are numerous longitudinal ribs ; on body-whorl of some specimens these 

 ribs become nearly obsolete ; where spirals cross the axial ribs a retic- 

 ulate appearance is produced. Aperture rectangular, forming a short, 

 wide canal; with thin, sharp, outer lip; inner lip incrusted, smooth. 

 Dimensions of type : diameter, 17 mm. ; height unknown. 



Occurrence. — At localities 2958, 2985, middle Etchegoin. At the 

 type locality near middle of western boundary of NW % of NW 14 

 sec. 8, T. 23 S, R. 17 E, M. D. B. & M., this species occurs with the 

 following species: Area trilineata Conrad, Calliostoma. cf. kerri Ar- 



