Cape St. Lucas, including the Gulf of California, thence southerly 

 to a point a few miles south of Panama, with the exception of col- 

 lections made at a few places in the Gulf of California, also at San 

 Juan del Sur, and its immediate vicinity on the coast of Nicara- 

 gua and in the bay of Panama, but little more is known of this 

 vast reach of shore-line, than was known years ago. 



Mr. Stearns stated that at some future time, as soon as the data 

 collected by himself and his co-workers here are compiled, he pro- 

 posed to refer to the subject again. 



[From the Proceedings of the California Academy of Sciences, August oth, 1872.] 



Description of New Species of Shells from California. 



BY ROBP^RT E. C. STEARXS. 



Siphonaria Brannani, Stearns. Shell oval, subconical, helcion-shaped ; apex 

 recurved and somewhat twisted, anterior and sometimes quite in line with mar- 

 gin; surface of shell irregularly undulating, of a dark brownish color, and 

 marked with numerous fine whitish radiating ribs which crenulate the margin ; 

 shell internally shining, and dark chocolate brown ; muscular impression and 

 siphonal groove distinct. Some specimens are quite irregular in outline, being af- 

 fected in that respect by the inequalities of the surface upon which they are found. 

 Numerous specimens of this shell were collected at Santa Barbara Island, off 

 the southern coast of this State, in the month of June, 1871, by Mr. S. A. L. 

 Brannan, to whom I am indebted for the specimens from which this description 

 is made. The largest of eighteen specimens measures, long. -39, lat. -30 inch, 

 though most of the specimens are much smaller than above dimensions. 



Truncatella Stimpsonii, Stearns. Shell cylindrical, solid, light reddish horn- 

 color, or amber ; shining, slightly decreasing in size towards ape.x ; closely and 

 strongly longitudinally ribbed, the ribs even, regular and interrupted only by 

 the suture ; upper whorls wanting, remaining whorls, 4 ; aperture oval, some- 

 what oblique, slightly angulated above ; peristome continuous, thickened and 

 moderately angulated at its junction with the body whorl. 



Length of largest specimen, -22 inch ; length of aperture, -06 inch. 



Habitat; False Bay, near San Diego, California, where numerous specimens 

 were detected by Henry Hemphill, Elsq. This shell is quite distinct from T, 



