Clark: The San Lorenzo Series of Middle California 187 



This species appears to be close if not identical to a species found 

 in the Temblor beds (Lower Miocene) in the vicinity of Bakersfleld, 

 California, which is associated with Cancellaria condoni Anderson and 

 Cancellaria dalliana Anderson. It is a fairly common species in the 

 Agasoma gravidum beds. 



CANCELLARIA SOBRANTENSIS, n. sp. 

 Plate 23, figure 6 

 Type specimen 11238, Coll. Invert. Palae. Univ. Calif., loc. 2754 



Shell medium in height ; spire fairly high, with five or six whorls ; sutures 

 depressed ; whorls gently convex except in the vicinity of the suture where they 

 are strongly tabulated ; narrow tabulated area practically at right angles to sides 

 of whorl. Surface sculptured by medium coarse, spiral ribbing, the interspaces 

 between which average about the width of the ribs. On the whorls of the spire, 

 below tabulate area, there are five or six, and on the body whorl twelve or thirteen 

 of the spiral ribs. Surface of whorls also covered by about sixteen narrow, 

 rounded, longitudinal ribs, which become obsolete on anterior end of body whorl. 

 Aperture elongate-ovate ; outer lip thin ; inner lip heavily incrusted. Canal short 

 and straight ; umbilicus subperforate. Only the type of this species is known. 



Dimensions. — Height, about 20 mm.; height of body whorl, 15 mm.; maximum 

 width of body whorl, about 11 mm. 



Occurrence. — University of California locality 2754. 



CANCELLARIA, sp. A 

 Plate 23, figure 9 



An imperfect specimen of a Cancellaria was found at University 

 of California locality 14, which appears to be a distinct form. The 

 whorls are angulated but are rather strongly convex just below the 

 suture. The surface is sculptured by about eight longitudinal ribs ; 

 these are crossed by rather fine, spiral ribs, which are about as wide 

 as the interspaces between them. Aperture broadly subovate ; canal 

 short. 



CANCELLARIA ?, sp. B 

 Plate 21, figure 1 



A few imperfect casts of a species were found at University of 

 California locality 3053, which appear to be referable to the genus 

 Cancellaria. A drawing of one of these is shown on plate 19, figure 

 1. The material is too poor for specific determination; apparently, 

 however, it is a distinct form. 



