8384 PROCEEDINGS OF THE NATIONAL MUSEUM. VOL. XXXIV. 
mental lines; suture distinct, wavy. Aperture broadly ovate; canal 
moderately narrow, rather short, straight. 
Dimensions.—Length, 40 mim.; latitude, 25 mm.; apical angle about 
63°. 
Notes.—This species is distinguished from other members of the 
genus In associated formations by its broad form. In general outline 
it resembles Priscofusus corpulentus Conrad from the Oligocene- 
Miocene of Astoria, Oregon, but has more regularly rounded, less 
angulated whorls and apparently more prominent spiral sculpture. 
Type.—A well-preserved cast in soft sandstone, L. 8. J. U., No. 
1081. 
[Torizon.—Upper Miocene, above basalt flow. 
Locality.—Santa Cruz quadrangle, Santa Clara County, locality 
No. 42, near Frenchman’s Tower, on hill between Tusk Gully and 
Madera Creek, 24 miles south-southwest of Mayfield. (J.C. Branner, 
R. Arnold.) 
Genus AGASOMA Gabb. 
AGASOMA STANFORDENSIS, new species. 
Plate XX XV, fig. 5. 
Description.—Shell attaining a length of at least 60 mm., broadly 
pear-shaped, body whorl large as compared with the spire, which is 
depressed-conical; whorls 4, convex, the three upper ones almost en- 
veloped; exposed portion of the upper whorls spirally sculptured ; 
body whorl large, plump, biangular; surface between angle and upper 
suture convex, sloping at angle of about 30°; sides nearly flat; upper 
angle ornamented by about 10 unequally spaced unequal amially 
elongated nodes; lower angle similarly sculptured except that the 
nodes are weaker but considerably longer and become obsolete only 
a short distance below the middle of the space between the two 
angles; spiral sculpture consists of about 11 or 12 quite prominent, 
widely and almost equally spaced wide raised lines, in the spaces be- 
tween which are several alternating raised lines of less importance; 
suture appressed, distinct. Aperture subovate; lips simple; canal 
moderately long and recurved. 
Dimensions —Of type from which the canal has been broken, 
leneth, 55 mm.; latitude, 50 mm.; apical angle about 106°; spire, 
5+ mm. 
Notes.—This species is closely allied to and probably the direct 
descendant of A. kernianum Cooper from the Vaqueros or lower 
Miocene formation. It may be distinguished from the latter by its 
usually much larger size, wider and more sloping space between 
suture and upper angle, and less prominent but longer nodes on the 
lower angle. ‘The details of spiral sculpture are quite similar on the 
