1902.] 



NATURAL SCIENCES OF PHILADELPHIA. "iSl 



Vitrea sculptilis (Bid.)- 



A single specimen, diameter 8^ mm., was taken on Bluff moun- 



tain. 



Vitrea hammonisCSuom.). Pi. XXIll, figs. lO. n, 12. 



Paint Rock, south side, one specimen. The shell figured for 

 comparison ^vith the following species is from ISIohawk, N. 1. 

 Vitrea clingmani Dan. PI. XXIIL figs. 1.2 3. 



yi^rea icheatleyi cUmjmcnn ^all, Nautilus XI WO (1890) 

 Vitrea clingmani Dall, Proc. A. N. S. 1 ., 1900, p. 15U, Q,. 

 As stated in Pali's description cited above, the types of this rare 

 species were taken by Hemphill at or near Clingnian's Peak or Mt 

 Gibbs according to the map of the Topographical Survey 111^ firs 

 specimens in 1901 were found on Mt. Clingman, beside the trail just 

 north of the summit. Four specimens were found under one og a 

 short distance below the summit of Mt. Mitchell on the northeast 

 side It is evidently rare on Mitchell, as most careful search failed 

 to bring any more to light. A single specimen was taken on A\ il- 

 son's Cove and another on Cat-tail. -„ , rp i , •. 



Ferriss found it in some greater quantity on Potato Top, but it 

 appears to be rare even there. _ 



V. clmgmani is peculiar to Black mountain range. It is one of 

 the largest of the Yitreas and, once seen, is easily recognized, ihe 

 animal is dark bluish-black, and when alive the_ whole shell 

 appears black; in this respect it reminds- one of Zomtoides nihdm 

 Mall When cleaned the shell varies from a yellow to reddish 

 horn-color, but occasional specimens are tinged with green as stated 

 in Dr. Dall's description. 

 Vitrea approxima W. and P.. n. sp. PI. XXIII, figs. 7, 8, 9. _ 



Shell about the size and shape of F. hamnonu ; glossy, smok> 

 greenish horn-color, tinged with pink above; umbilicus round and 

 deep- slightlv convex above, whorls 4^ regularly increasing, sur- 

 face Iculptui^d above with irregularly spaced radial grooves similar 

 to those of V. haMmonis, but less crowded and with microscopic 

 revolving impressed lines ; aperture trausver-sely rounded -lunate. 

 Alt. 2, greater diam. 4^ mm. . , , -i 



Two specimens only of this species, which cannot be satisfactorily 

 assimilated with any of the described species, were taken m >N il- 

 son's Cove, Mt. Mitchell. It is closely related to V. hammonis in 



