Jaw and Lingual Dentition of Pulmonata. 175 



Helix Hopetonensis, Shuttl. (Triodopsis). 

 City of Charleston, S. C. 



Genitalia (pi. xvii, fig. 14). See above, H. tridentata. 



Helix Van Nostrandi, Bland, MS. (Triodopsis). 

 Aiken, S. C. Miss Emma Van Nostrand. 



Jaw as usual in Triodopsis: ribs 17. 



Lingual membrane (pi. xvii, fig. 8) long and narrow. Teeth 24- 

 1 - 24, with 10 laterals. The centrals have no distinct side cusps or cut- 

 ting points, but the latter are replaced by decided bulgings on the median 

 cutting point. The figure gives the central with the first, tenth, eleventh, 

 nineteenth and twenty-fourth teeth ; the last two are marginals. 



Genitalia (pi. xvii, fig. 12). See above under H. tridentata. 



Helix Rugeli, Shuttl. {Triodopsis). 



East Tennessee. Mr. A. G. Wetherby. 



Genitalia (pi. xvii, fig. 18). See above under H. tridentata. 



Helix Harfordiana, J. G. Cooper (Triodopsis). 

 California. Mr. Henry Hemphill to Mr. T. Bland. 



Lingual membrane (pi. xviii, fig. A) as usual in the subgenus (see 

 Proc. Ac. Nat. Sc. Phila., 1875, 206). Teeth 26-1-26, with 12 laterals. 

 The side cutting points to central and lateral teeth are well developed. 



Jaw as usual in the subgenus (see same references as above), with 

 over 12 ribs. 



Helix fringilla, Pfr. (Merope). 

 Admiralty Island. Mr. A. G. Wetherby. 



The dried remains of the animal in the shell of a cabinet 

 specimen furnished the lingual membrane and jaw here de- 

 scribed. The shell is the variety with the pink peristome. 



Jaw with numerous, crowded, stout ribs, denticulating either margin. 



Lingual membrane (pi. xiv, fig. A, pi. xv, fig. A) long and narrow. 

 Teeth 28 - 1 - 28, with about 1 1 laterals. Centrals with base of attachment 

 longer than wide ; side cusps obsolete, side cutting points wanting ; 

 middle cusp broad, blunt, with a very short, broad, blunt cutting point. 



