1902.] NATURAL SCIENCES OF PHILADELPHIA. 441 



examples were found not uncommon at Paint Rock, on the south 

 side of the river, and specimens nearly so, differing, however, in the 

 less acute development of the lower carina, occurred in Wilson's 

 and Tyson's Coves, 



On Cat-tail and Potato Top and in Bee Tree Cove, the specimens 

 have both the keels less acute, and are more striate l)elow the per- 

 iphery. This form is intermediate between the typical hryanii and 

 the Mt. Mitchell form which has the characteristics of a well- 

 marked subspecies, the base being regularly costulate, the keels 

 blunt and the intercarinal concavity nearly obsolete, much as in 

 perspectiva. Young shells, however, are less specialized and resem- 

 ble the intermediate form mentioned above. But the internal 

 columellar tubercle, exceedingly constant in per'spediva, is wholly 

 wanting. It is a peripheral form, probably at the geographic con- 

 fines of the range of bryanti. 



SUOOINEID^. 

 Succinea ovalis Say. 



A single young specimen was taken at Paint Rock, on the south 

 side of the river, and two examples of the thin mountain form were 

 found in the gap between Mt. Mitchell and Clingman's Peak. 



The foi-m here referred to is that commonly known as S. obVqua 

 Say. Say described Succinea ovalis-^ in 1817 and S. ohliqua in 

 1824. ^^ Gould in 1841^^ referred the form commonly known as ovalis 

 to Say's ovalis of 1817. Say's types of ovalis are in the collection 

 of the Academy and belong to the form usually known as ohliqua. 

 This being so, ovalis has priority and must consequently be used, 

 ohliqua falling into the synonymy. The use of ohliqua for Say's 

 species was inaugurated arbitrarily by Dr. Amos Binuey" in an 

 " attempt to reconcile the differences " in the use of the names by 

 retaining ovalis for Gould's species and applying to " Mr, Say's 

 species his second name ohliqua." This, of course, he had no right 

 to do. 



AMNICOLID^. 

 Pomatiopsis lapidaria (Say). 



A pale-green form of this species, ratlicr more slender than the 

 common northern form, was taken at Paint Rock, on the south side 

 of the river. 



=" J. A. N. S.R, I, 15 (181 T). 

 ^'^ Long's Exped., II, 260 (18-^4). 

 '^■^ Invert. Mass., 194. 

 -'' Terr. Moll, II, 64. 



