THE NAUTILUS. 81 
late-colored, and ending below in a short, open canal. Outer lip 
thickened, arcuate, and five-dentate within. Inner lip smooth, 
covering the columella. Canal open, short, and a little deflected to 
the left. Umbilical region closed by the extending columellar 
callous. 
Alt. 17, diam. 10 mill. Aperture alt. 7 (excluding canal), diam. 
4 mill. 
This is a distinct little shell and not referable to any species with 
which I am acquainted. Its nearest ally appears to be Ocinebra 
circumteata Stearns, from which it is separated by its more pointed 
elongated spire, and absence of the two brown bands. The ribs in 
circumtexta are not so well developed, and the spiral lire are not 
so coarse. There are seventeen spirial liree upon circumtexta, 
whilst upon jenksii there are but ten. The greatest difference, 
however, is in the embryonic whorls, which in cireumtexta are dis- 
tinetly bicarinate, while in jenksii they are rounded. It bears some 
superficial resemblance to Ocinebra gracillima Stearns, but is sep- 
arated from that species by its more angular form. The ribs, too, 
are more numerous in gracill/ima, and the canal is closed. The 
embryonic apex in gracillima is corrugated whilst that of jenksii is 
smooth. It is separated from Ocinebra michaeli Ford, by its much 
shorter canal, more rotund form, and thickened lip. 
I have seen but four specimens of this species, obtained from the 
Wagner Collection at the Wagner Free Institute of Science, and as 
they show little or no variation, I am led to believe the characters 
‘are quite constant. 
I am indebted to the kindness of Mr. C. W. Johnson, assistant 
curator, Wagner Free Institute of Science, for the privilege of’ 
studying and describing the species. The types are now deposited 
in the Wagner Collection. The habitat is unknown. 
I take great pleasure in naming this interesting little species in 
honor of Prof. J. W. P. Jenks, Curator-in-Charge of the Museum 
-at Brown University, Providence, R. I. 
HELIX (STENOTREMA) HIRSUTA SAY, ON THE WEST COAST. 
Of this form Mr. W. G. Binney remarks in his “ Manual of 
American Land Shells,” page 279, “a postpliocene species now found 
-over the Northern and Interior regions as far as Kansas and Vir- 
