192 Jaw and Lingual Dentition of Puhnonata. 



Considering the intimate acquaintance of my friend, Mr. 

 Gulick, with the genus, and his publication of a classification 

 of the AchatellincB (Proc. Zool. Soc, 1873), it seems to me 

 very desirable that his views should be compared with those 

 of v. Martens, with especial reference to the results obtained 

 from examination of the dentition. 



In the foregoing paper by Binney, he expresses doubt as 

 to the validity of our group c, and for my present purposes 

 I therefore adopt two groups only, a and b, as indicated by 

 the dentition of the species. 



Gulick's classification is as follows : — 



ACHATELLIN'-E. 



A. Arboreal Genera. 



1. Achatinella, Swainson. 



Type A. vulpina, Fer. 

 This is equivalent to the s. g. Achatinella s. str. of v. Martens. 



2. Bulimella, Pfeiffer. 



Type B. rosea, Sw. 

 This agrees with the s. g. Bulimella of v. Martens. 



3. Apex, v. Martens. 



Type A. decora, Fer. 

 This also agrees with the s. g. Apex, v. Mart. 



4. Laminella, Pfeiffer. 



Type L. gravida, Fer. 

 Laminella, Gulick, includes section b of Newcombia, v. Mart., but 

 otherwise agrees with Laminella of that author. 



5. Partulina, Pfeiffer. 



Type P. virgidata, Mighels. 

 Gulick embraces in this s. gen. two sections, Perdicella and Ebur- 



nella, proposed by Pease, the type of the former placed in Lept- 



achatina by v. Martens, of the latter in Partulina. 

 Parrtidina, Gulick, otherwise agrees with the same s. gen. of v. 



Martens. 



6. Newcombia, Pfeiffer. 



Type N. Cumingi, Newc. 

 . Gulick, in a measure, agreeing with Pfeiffer, confines this s. gen. to 

 the plicated species of section a. Newcombia, v. Mart. A. picta 

 of that section is in Laminella, Gulick. 



7. Aiiriculella, Pfeiffer. 



Type A. auricida, Fer. 

 Gulick and Pfeiffer correctly treat A. auricula. That and other 

 species of the s. gen. (Bland & Binney, 1. c.) have the same denti- 



