Jaw and Lingual Dentition of Pulmonata. 171 



Patula alternata, Say. 



I have also examined and here figure (pi. xvii, fig. 15), the genitalia 

 of the heavily ribbed form of P. alternata, from Eastern Tennessee (Mr. 

 A. G. Wetherby). It agrees with the typical P. alternata, and also in 

 dentition. In both forms I found the duct of the genital bladder much 

 longer than is figured by Leidy, in the Terrestrial Mollusks U. S. In P. 

 Cumberlandiana also it is long, thus agreeing with alternata. 



Patula Huahinensis, Pfr. 



Huahine Isl., Mr. A. Garrett. 



Lingual membrane, with 18-1-18 teeth, of which about six are later- 

 als. The type of dentition is about the same as in Endodonta incerta, 

 herewith described. The marginals are, however, different, the two cut- 

 ting points being bifid, the base of attachment low and wide. (Plate 

 xvii, fig. 17). 



Endodonta incerta, Mousson. 

 Huahine Island, Mr. A. Garrett. 



I am indebted to Mr. Garrett, for the identification of this 

 and all the Huahine species herewith described. 



I regret not succeeding in obtaining the jaw of any species of this 

 group, the more because some doubt about its existence has been ex- 

 pressed. It is, however, probable that it will be found, as no aguathous 

 genus has yet been noticed with the quadrate marginal teeth, which charac- 

 terize E. incerta, and also E. tumitloides, Garrett (Proc. Ac. Nat. Sc. 

 Phila., 1875, p. 248, pi. xxi, fig. 6). 



Lingual membrane (pi. xvii, fig. 16) with 11-1-11 teeth, of which 4 are 

 perfect laterals. The marginals (of which the last is shown in the figure) 

 are but a simple modification of the laterals. They differ from those of 

 tumuloides, unless, indeed, I have, from their exceeding minuteness, failed 

 rightly to interpret them. 



Helix Ingersolli, Bland (dlicrophysa) . 

 Mr. Ernest Ingersoll : U. S. Survey of Territories, 1874. 



Jaw low, wide, slightly arcuate, ends slightly attenuated : whole an- 

 terior surface with about 22 broad, flat, slightly separated ribs, whose 

 ends denticulate either margin. 



This form of jaw is unusual among the Helicince. It is somewhat like 

 that of H. Lansingi (see Phila. Pr., 1875, p. 169). 

 November, 1875. 13 Ann. Lyc. Nat. Hist., Vol. xi. 



