244 PROCEEDINGS OF THE ACADEMY OF 



ON THE LINGUAL DENTITION AND GENITALIA OF PARTULA AND 



OTHER PTJLMONATA. 



BY W. G. BINNEY. 



I owe to the kindness of Dr. W. D. Hartman, of West Chester, 

 Pennsylvania, the opportunity of examining numerous species of 

 Partula. The specimens were received by him directly from Mr. 

 Garrett. Their identification is that of the latter, and may be 

 relied upon on account of his relations with Mr. Pease. Of their 

 value as distinct species, however, I have nothing to say. So 

 labelled were Partula fusca, Pease ; P. citrina, Pease ; P. plani- 

 labrum, Pease ; P. abbreviata, Pease ; P. umbilicata, Pease ; 

 P. bilineata, Pease ; P. amanda ; P. virginea, Pease ; P. gracilis. 

 Each of these were represented by several specimens still 

 remaining in their shells. Each species was in a separate bottle, 

 great care being taken to preserve their identity and pevent inter- 

 mingling of species. 



In addition to the above nine so-called species, there was one 



w 



large bottle containing many specimens of the following : Partula 

 rosea, Brod. ; P. formosa, Pease ; P. ? lugubris ; P. varia, Brod. ; 

 P. compacta, Pease ; P. Garretti, Pease ; P. ? dentifera, Pease ; 

 P. crassilabris, Pease ; P. Hebe, Pfr. ; P. protea, Pease ; P. 

 globosa, Pease ; P. approximata, Pease ; P. turgida, Pease ; P. 

 faba, Martyn. As the species of the above lot were not separately 

 indicated, the specimens are of value only as thi'owing light upon 

 the generic characters of Partula. Especially as proving the con- 

 stancy of the peculiar dentition of the lingual membrane, they 

 serve an excellent purpose. To this end I have examined the 

 membrane of all of the specimens in the bottle. The result of the 

 examination will be given below. 



The external characters of all the species agree. The animal 

 is blunt before. The tail is long and gradually acuminated. 

 There is no caudal mucus poi'e, no parallel furrows along the 

 side of the foot, no distinct locomotive disk. The labial processes 

 and the collar seem unusually developed. The anal and respira- 

 tory orifices are situated as usual in the shell-bearing Geophila. 

 The genital orifice is close behind and below the right eyepedun- 

 cle. The tentacles are present in all the species, protruding in 



