186 Jaw and Lingual Dentition of Pulmonata. 



Stenogyra juncea, Gld. 

 Island of Huahine. Mr. A. Garrett. 



The species was described originally as a Bulimus, in which genus it 

 is retained by Pfeiffer. I do not find it in die Heliceen, ed. 2. 



Lingual membrane with 28-1-28 teeth, eight of which are laterals. 

 Teeth as in S. hasta as figured by me, Proc. Ac. N. S. Phila., 1875, pi. 

 xx, fig. 2. 



Strophia incana, Binney. 

 Key West. Mr. W. W. Calkins. 



Jaw already described (Proc. Acad. Nat. Sc. Phila., 1875, p. 190, 

 fig. 37). 



Lingual membrane (see above reference) with 27-1-27 teeth. The 

 change from laterals to marginals is as shown in the ninth and tenth tooth. 

 There is the usual splitting of the inner cutting point beyond the ninth 

 tooth. The extreme marginals are low, wide, with one inner, long, 

 bluntly bifid cutting point and one outer,, short. 



All the changes from centrals to extreme marginals are shown in the 

 figures. PI. xiii, fl<. r . J. 



The splitting of the inner cutting point of the marginals was not 

 detected by me before in S. iostoma aud mumia. I have, however, 

 lately fouud it-in those species. 



Bulimulus pallidior, Sowb. 

 Lower California. Mr. A. G. Wetherby. 



Plate xii, fig. 1, represents the genital system. The penis sac is long, 

 tapering at its end, where the retractor muscle is inserted. The genital 

 bladder (g. b.) is globular, on a long, stout duct. 



Bulimulus limnseoides, Fer^ 

 St. Kitts. Dr. Branch to Mr. T. Bland. 



Jaw (pi. xvi, fig. A.) low, wide, semitransparent, slightly arcuate, 

 ends scarcely attenuated, blunt : anterior surface with about sixteen ribs, 

 denticulating either margin. It is extremely difficult to decide upon the 

 character of these ribs. Some appear to be a simple thickening of the 

 jaw formed by the overlapping of distinct separate plates. Others remind 

 me of the distant narrow ribs of most of the Bulimuli, of the character 

 of the ribs in Cylindrella, etc. At other points upon the jaw there seem 

 to be broad, flat ribs with narrow interstices. 



