no. 1617. NEW CRETACEOUS AND TERTIARY FOSSILS—ARNOLD. - 3885 
two species, but coarser in A. stanfordensis. Both the type and the 
fossil from San Diego, which may be the same species, the only two 
specimens extant, are casts; details of the sculpture are therefore 
unobtainable at present. 
Type.—Internal cast, lacking canal; L. S. J. U., No. 1087, locality 
No. 4. 
Horizon.—Miocene above and eter than the basalt flow; this hori- 
zon believed to be the equivalent of the “Contra Costa Commits Mio- 
cene” of Merriam, which is above the Monterey (middle Miocene). 
Localities—Santa Cruz quadrangle, Santa Clara County, locality 
No. 4, in ravine beside county road, 24 miles south of Mayfield (R. 
Arnold);? also found in the San Diego formation, lower Pliocene, on 
mission grade midway between the head of Sixth street and the old 
County Hospital at San Diego (Mrs. Kate Stephens). 
PURISIMA AND MERCED (UPPER MIOCENE AND PLIOCENE) SPECIES. 
GASTEROPODA. 
Genus FUSUS Lamarck. 
Subgenus BUCCINOFUSUS Conrad. 
FUSUS (BUCCINOFUSUS) PORTOLAENSIS, new species. 
Plate XXXVII, fig. 8. 
Description.Shell attaining a length of at least 60 mm., fusiform, 
moderately slender; apex acute, whorls 7 or more, very convex, 
shightly compressed above near suture; nuclear whorls unknown; the 
next four crossed by 9 very broad, prominent, rounded varices ex- 
tending from lower suture to upper revolving sutural ridge; inter- 
space between varices deep and V-shaped; about 8 sharply defined, 
rounded, revolving ribs (between each pair of which on the lower 
whorls is often a small intercalary) occur on each whorl in addition 
to the sutural rib which is more prominent then the others; whole 
surface crossed by numerous small incremental lines; body whorl 
quite regularly convex, projected into a long, shghtly outward-curv- 
ing pillar; varices obsolete, or nearly so, on the body whorl, and also 
on the penultimate whorl on the larger specimens, as in /’. barbaren- 
sis Trask; suture distinct, wavy. Aperture elongate-elliptical; outer 
lip internally striate; inner lip smooth gently concave; canal rather 
long, narrow, curved outward toward anterior extremity. 
Dimensions.—Length, 62 mm.; latitude, 31 mm.; longitude of body 
whorl, 44 mm.; longitude pence and canal, 34 mm.; apical angle 
about 49°. 
Notes.—This species, which is very abundant at the Portola local- 
ity, 1s quite closely related to FY. (Buccinofusus) coosensis Dall, from 
Proc. N. M. vol. xxx1v—08——29 
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