434 I'ROCEEDINGS OF THE ACADEMY OF [May, 



Gastrodonta gularis (Say). 



At Paint Kock, ou the uortli side of the river, a form of this 

 species was taken which is like the depressed examples from Hayes- 

 yille, N. C, mentioned in the report of the Pentadelphian expedi- 

 tion. Aside from this lot, no specimens were takeu agreeing with 

 the form of gularis almost everywhere prevailing in the Great 

 Smoky mountains. ^^ In its place, three well-marked subspecies of 

 gularis occurred. 



Gastrodonta gularis theloides A. D. Brown, n. subsi). PI. XXV, figs, i, 2, 3, 4. 



Shell glossy, yellow, perforate, with mixlerately raised, dome- 

 shaped spire, composed of 7^ to 8 narrow, closely coiled Avhorls; the 

 last hardly regidar at the periphery in adult shells ; rather strongly 

 striate above, nearly smooth beneath, with faint traces of spiral 

 striae near the umbilicus, where the base is rather conspicuously 

 excavated. Aperture somewhat triangular, the sloping basal lip 

 being straight. The peristome is acute, strengthened within by a 

 rather ivide, low callous rim. Adult shells are without teeth or 

 laminxe. Alt. 4i-5, diam. 7^-8 mm. 



Young shells (5 to 6 mm. diam , PI. XXV, fig. 4) are nearly 

 discoidal, with the umbilicus as wide as in adults, base glossy, 

 sculptured like the adult shells, the aperture armed within with two 

 long strong lamellae, the summit of the outer one c\irying toward 

 the inner; there is also, in early stages, a smaller lamella peri- 

 pheral in position. 



" North Carolina " (A. D. Brown coll., Xo. 56,914 A. X. 8.); 

 Black mountains, X. C. (Henry Hemphill) ; abundant ou Bluff 

 mountain; a few only at INIeadow Cove, Wilson's and INIt. 

 Mitchell. 



Fig. 8 is from one of A. D. Brown's specimens; figs. 1, 2, 4 

 are from Bluff mountain shells, collected by Walker. 



This race was recognized by A. D. Brown many years ago and 

 named in his collection (now in coll. A. X. S, P.), but it seems 

 never to have been characterized by him. Various con-espondents 

 in America and England have submitted similar shells to one of 

 us, and had them so named ; owung to the desire to avoid overload- 

 ing the nomenclature of a difficult group, the name has not hitherto 

 been published. 



'■■ Vide these Proctedinrjs for 1900, pp. 142, 14:3. 



