56 



University of California Publications in Geology [Vol. 10 



The coarse sculpture of this species, which resembles that of many 

 of the Muricidae, is believed to differentiate it from other members 

 of the genus. 



One specimen only was found, from which the outer lip had been 

 broken. 



CANCELLAEIA QUADEATA, n.sp. 

 Plate 1, Figure 6 



Univ. Calif. Coll. Invert. Palaeont., no. 11083. Type locality, Fourth and 

 Broadway, Los Angeles. 



Shell small, low, fusiform, with a moderately elevated spire, which 

 is perhaps one-fourth the length of the shell. There are six angulated, 

 strongly tabulated whorls, with parallel walls. Sculpture of the body- 

 whorl consists of four equally developed, equidistant spiral ribs below 

 the tabulation, with smaller, low, rounding ribs in the interspaces, 

 and four indistinct ones on the tabulation ; ten prominent longitudinal 

 ridges intersect the spiral sculpture at right angles and exhibit a 

 tendency toward the development of spinous nodes on the angulation. 

 Aperture oval, constricted anteriorly ; outer lip is unknown ; inner lip 

 bears eight spiral lines concentric with the two sharp columellar 

 plications. The pillar is strongly curved away from the aperture ; 

 canal broad and probably short. 



Dimensions. — Longitude unknown ; latitude, 7.5 mm. 



The tabulation of the whorls, character of the sculpture and sharp- 

 ness of the columellar plaits are unique features of this form. 



One specimen only was found ; a large part of the body-whorl and 

 the canal are lacking. 



PECTEN (PEOPEAMUSIUM) LEVIS, n.sp. 

 Plate 2, Figures 2a, 2b, 2c, 2d 

 Univ. Calif. Coll. Invert. Palaeont., no. 11084. Type locality, Fourth and 

 Broadway, Los Angeles. 



Shell small, thin, translucent, nearly circular in outline, equilateral, 

 compressed, slightly inequivalve. Right valve is smooth except for 

 numerous very fine incremental lines, which occasionally are enlarged 

 and roughened; traces of submiscroscopic radiating striae are to be 

 seen. Hinge line is about five-eighths the width of the shell; ears 

 sharply set off from the disc by equal impressed lines which are nearly 

 straight and slope evenly from the umbone ; anterior ear arcuate, 

 coarsely sculptured by about fourteen subequal ridges which radiate 



