238 



University of California Publications in Geology [Vol. 10 



a flattened appearance. Axially sculptured by eleven prominent ribs 

 which become less marked on the tabulate portion above, on the body- 

 whorl these extend only to lower peripheral angle. Spiral sculpture 

 on the body-whorl consists of seven and on the spire five strongly 

 elevated cords. Outer lip of type defective. Aperture narrow, with 

 long twisted canal. Inner lip slightly incrusted, pillar long and 

 slender, with two thin, sharp plaits on the lower part. Height, about 

 41 mm. ; diameter, 20 mm. 



Occurrence. — At locality 2533, near middle of southern boundary 

 of NW y 4 of NE 14, sec. 29, T. 21 S, R. 14 E, M. D. B. & M., on north 

 bank of Waltham Creek. At the type locality this form occurs with 

 the following characteristic Etchegoin species : Macoma vanvlecki 

 Arnold. Pecten terminus Arnold, Pecten oweni Arnold, Phacoicles 

 annulatus (Reeve), Bathytoma tryoniana (Gabb), Ficus nodiferous 

 Gabb, Tunis coalingensis (Arnold), Thais kettlemanensis Arnold, 

 Turritella nova Nomland. 



CANCELLAEIA FEENANDOENSIS TB1BULIS, n. var. 



Plate 12, figures 1, la 

 Type specimen 110. 11095, Univ. Calif. Coll. Invert. Palae. 



Shell broadly fusiform, spire high, with about four whorls ; body- 

 whorl large ; suture distinct, almost channeled. Wborls with sharp 

 angle immediately below suture, giving a tabulate appearance to the 

 upper part ; sculptured with about sixteen prominent axial ribs, 

 which on the body-whorl become less distinct above the shoulder 

 and are almost obsolete on the canal. Spiral ornamentation on the 

 body-whorl consisting of twenty-two, and on the whorls of the spire 

 about nine, nearly equal cords with narrow interspaces, which on 

 crossing the axial ribs form nodes. Aperture ovate, forming a short, 

 slightly twisted canal. Pillar nearly straight, covered by a thin 

 coat of callus ; with two broad, low plaits with wide interspaces. 

 Dimensions: height, 34 mm.; diameter, 19 mm. 



This variety has fewer axial ribs, shoulder is higher up on the 

 whorls, upper surface of whorls more distinctly tabulate, and whorls 

 enlarge more rapidly than the typical form. 



Occurrence. — At locality 2964, on low hills near divide between 

 Big Tar Creek and Garza Creek, near center of NE y± of NW 14, sec. 

 7, T. 23 S, R, 17 E, M. D. B. & M., middle Etchegoin Pliocene. At the 

 type locality this species occurs with a fauna including the following 



