&6 THE NAUTILUS. 
that species in the collection of the Academy (part of the original 
lot), shows it to be very strongly ribbed. Indeed, Dr. Newcomb 
himself bases its claim to distinctness from P. striatella upon the 
stronger ribs and smaller size. P. Cockerelli is far smoother than 
P. striatella, and, indeed, is so distinct from that species that no de- 
tailed comparison is needed. P. Cockerelli is far more like the 
Japanese P. pauper Gld. than any American species; but there is 
no evidence showing P. paupe® Gld. or P. floeculus Morel. to occur 
in American territory. The latter was described from Kamchatka, 
and has been found on Bering Island in the western Aleutians. 
Dr. von Martens has well figured the type specimen in his concho- 
logical miscellany, “‘Conchologische Mittheilungen.” 
P. Cronkhitei is barely distinguishable from P. striatella by the 
features alluded to above, and its standing even as a sub-species of 
striatella is dubious. It occurs commonly in northern California, 
in the counties draining into the Sacramento, and the same form has 
been found in Alaska; but I have not seen it from intervening 
territory. ; 
Pyramidula striatella catskillensis n. var. 
Sculpture sharper than in the typical form, umbilicus wider and 
shallower, and periphery angulated. Tannersville Valley, Catskill 
Mountains, N. Y.; White Pond, Warren County, N. J. 
Mentioned in the Catalogue of Amer. L. Shells (No. 344a), but 
not before described. 
Omphalina fuliginosa polita un. y. 
Similar in general features to O. fudiginosa, but the surface 
glossy, as though varnished. Mountain region of eastern Tennes- 
see and western North Carolina, particularly the ranges along the 
boundary. Mentioned, but not described, in the Classified Cata- 
logue of Land Shells of America, No. 246a. 
Gastrodonta Clappi n. sp. 
Shell depressed, shaped much like G. multidentata, the upper 
surface somewhat convex, lower surface flattened, deeply in- 
dented around the minute umbilicus; thin, a little transparent, 
deep chesinut-amber colored and brilliantly glossy; composed of 
fully 63 very narrow and closely coiled whorls, the initial one rather 
coarse, the first half turn smooth, the rest of the shell sculptured 
with closely spaced impressed radiating grooves, which extend with 
