284 University of California Publications in Geology [Vol. 7 



The body-whorl with canal is nearly one and a half times as 

 long as the spire. It is suddenly contracted into a long, narrow 

 canal about two-fifths of the distance below the angle. 



Only one large specimen was found at University of Califor- 

 nia Locality 1853. 



Dimensions : Length, 73 mm ; width of body- whorl, 28 mm. 



VOLUTA LAWSONI, n.sp. 

 Plate 12, figures 5a, 5b, and 5c 



Shell conical with short spire ; eight whorls, the first and 

 second smooth and turbinate ; the third, fourth and fifth decor- 

 ated by about ten vertical ribs, which end at the angle of the 

 whorl in spiny nodes. The angle of the whorls is nearly 90°. 

 The space above the shoulder is flattened and on the body-whorl 

 is channeled. Suture, linear, distinct. Outer lip, straight and 

 simple. Columella faintly incrusted. Inner lip marked by three 

 faint plaits. The body-whorl is decorated by fine revolving lines 

 which increase in size on the lower part of the whorl. 



Named in honor of Professor A. C. Lawson, University of 

 California. 



The type specimen was found at University of California 

 Locality 1853. Three other specimens were found at Locality 

 1856. 



Dimensions : Length, 21mm ; width of body-whorl, 10mm. 



TURRITELLA MERRIAMI, n.sp. 

 Plate 13, figures 6a, 66, and 6c 



Shell moderate in size, elongate ; whorls number about fifteen 

 or sixteen ; the first four whorls are rounded and marked by three 

 strong revolving ribs with a single riblet between each pair. The 

 fifth, sixth, seventh and eighth whorls are also convex, but the 

 center of the convexity is below the middle of the whorl ; these 

 whorls are marked by five nearly equal revolving ribs, equally 

 spaced. The rest of the whorls are markedly different from the 

 upper eight whorls. The first revolving rib below the suture 

 is much larger than the rest, and the space between it and the 

 impressed suture is flattened horizontally making a tabulate 

 shoulder. The next three ribs are equal and equally spaced. The 



