190 Jaw and Lingual Dentition of Pulmonata. 



Tornatellina is recognized as a genus by Pfeiffer (Mon. 

 VI), but by von Martens (Die Heliceen) is considered as a 

 subgenus of Cionella. It now remains to be seen whether 

 this peculiar dentition is shared by other species. 



I am indebted to my friend, Mr. A. 

 T. E. Lansing, for the drawing of the 

 teeth here given. It represents the 

 central, with the first and second side 

 teeth. There are an exceedingly 

 large number of teeth beyond this, 

 of the same type quite to the exterior 

 margin of the membrane. The teeth 

 are arranged obliquely in waving 

 rows, as is also the case in Achatinella. 



Tornatellina oblonga, Pease. 

 Island of Huahine. Mr. A. Garrett. 



Dentition same as in the preceding species. 



Achatinella. 



Already in connection with my friend, Mr. T. Bland 

 (Ann. Lye. Nat. Hist, of N. Y., X, 331, pi. xv), I have 

 described and figured the jaw and lingual dentition of sev- 

 eral groups or subgenera of Achatinella. Recently, I have 

 received from Mr. J. G. Anthony, some more specimens in 

 alcohol. I am indebted to Mr. J. II. Redfield for their 

 identification. 



I find A. marmorata, Gould, of which A. phnnlea, Gul., already exam- 

 ined, is a synonyme, of the subgenus Partulina.* to have the same denti- 

 tion as we have shown to characterize that subgenus as well as Achatinella 

 s. s. 



Of Lpptachatina there was the following : textilis, Fer. The dentition 

 is as in the other species of the subgenus examined by me. There are 

 26-1-2G teeth, with 8 laterals. Ou pi. xiv, fig. G, I figure the transition 

 from lateral to marginal teeth, and two decided marginals. These last 



* I use the subgeneric names of Von Martens. 



