114 CALIFORNIA ACADEMY OF SCIENCES. [Proc. 3D Ser. 



60. Scaphites perrini, sp. nov. 



Plate II, Figs. ti~T2>- 



The most remarkable species of Sca^phites that has been 

 discovered at localities in Southern Oregon was collected 

 recently by Dr. James Perrin Smith, in whose honor the 

 above name is proposed. 



Unlike other known types of this genus, most of which are inclined to be 

 discoidal, at least in some stages, S. perrini seems to be at no stage either 

 discoidal or merely gibbous or inflated. 



The shell is small, being little over 1.2. cm. in length, .9 cm. in greatest 

 width, and .65 cm. in greatest thickness. 



The section of the whorls, though not entirely visible, seems to be trans- 

 versely elliptical, or "digonal" with each " lateral angle " forming the margin 

 of a funnel-form umbilicus. The ventral surface is broad, extending to the 

 umbilical angle, rounded, and nearly smooth. The aperture is reduced by a 

 strong, rounded constriction which extends a little beyond the umbilical 

 angles, and is bordered in front by a sharp elevation or ridge. From each 

 side of the aperture large lateral ears extend forward, almost touching the 

 lateral angles of the preceding whorl, and reducing the form of tlie aperture 

 to subquadrate. The surface ornamentation of this species consists of small, 

 simple ribs, which do not appear to cross the wide ventral surface, or else 

 cross it only as fine lines, not visible upon the cast. These ribs are most 

 conspicuous upon the lateral angles of the whorl, which they cross, forming 

 small nodes, from which they incline obliquely backward on both the um- 

 bilical and the external surfaces. 



The suture line, which can be traced only across the rounded ventral 

 surface, is simple, consisting of broad saddles and narrow lobes, both of 

 which are bifid in their subdivisions. The siphonal lobe is simple, being 

 almost as wide as long, having one lateral and one terminal branch. The 

 first lateral saddle is quadrate in outline, and subdivided into two unequal 

 portions, which are again indented or divided in a similar manner. 



Occurrence. — S. perrini is known only from a single, 

 though nearly perfect, specimen, obtained recently from 

 the Smith ranch, near Phoenix, Oregon, by Dr. J. P. 

 Smith, through whose courtesy the author has been per- 

 mitted to describe it. It is from beds that are equivalent 

 in their horizon to those of the Lower Chico of the Sacra- 

 mento basin. 



The type is in the collections of the Leland Stanford Jr. 

 University. 



