438 PROCEEDINGS OF THE ACADEMY OF [May, 



Philomycus hemphilli (W. G. Binney). 



Comniou ou Mt. ^Mitchell, which is the type locality. 



ENDODONTID^ffi. 

 Pyramidula alternata (Say). 



The typical form occurred only at Paint Kock, ou both sides of 

 the river. Those from the north side have the ribs much heavier 

 and farther apart than those from the south side. 



At Tyson's, Wilson's and Ivy river were found smoother, brighter 

 forms, approaching fergusoni Bid. somewhat, especially in the gloss, 

 but with the ribs more prominent. The spiral sculpture is well 

 developed, the spiral lines being unusually prominent. This'micro- 

 sculpture, however, is practically the same in morclax. Periphery 

 )Ounded. This is a race of the region, unlike the Great Smoky 

 forms and the antithesis of mordax. This form, according to 

 "NVetherby^" (who refers it to var. fergusoni), is the only form of 

 alternata foimd at Koan mountain. Koan specimens, however, 

 though more lightly }-ibbed than those from ^Mitchell, are nearer to 

 them than to the typical fergusoni. The same form also occurs at 

 Elizabethtou, Tenn., and Scott county, Va. In the latter locality 

 it is said to be " found only on trees high up on the mountains " 

 (G. H. Clapp). This tree-climbing habit is also noticed by 

 "Wetherby, but vras not observed by any of the party in 1901. 



Pyramidula alternata mordax (Shuttleworth). 



In 1852, Shuttleworth" described his Helix ))iordax from speci- 

 mens collected by Kugel in the mountains of North Carolina, The 

 original description was reprinted by W. G Binney in Terr. Moll., 

 Ill, p. 19, but by a clerical error the dimensions of Zonites placen- 

 tula, which was described at the same time, were included in the 

 description of mordax. Shuttleworth' s description may be trans- 

 lated as follows : 



" Shell widely and perspectively umbilicated, depressed, sub- 

 lenticular, carinate, thin, yellow horn-color, ornamented with inter- 

 rupted red streaks in bands, beautifully sculptured with strong 

 flexuose ribs above and below; whorls 5^, flat; aperture very 

 oblique, angularly crescentic, oval; peristome simple, acute. 

 Greater diam. 18, lesser 16, height 6 mm. 



'6 /our. Cincinnati Soc. N. H., 1894, p. 75. 

 ^- Dern. Mittheil., 1852, 195. 



