191 Jaw and Lingual Dentition of Pulmonata. 
show the two cutting points which characterize the section b (see my 
paper referred to above, p. 334). On the same membrane, however, are 
some marginals having three cutting points and some which are quite 
pectinate, being, therefore, like my section ¢ to which I formerly referred 
the subgenus. This variation shows that my distinction between 6} and ¢ 
was not well founded. _ 
- Of Laminella there was one species: A. obesa, Newe. The jaw is like 
my fig. 7 (.c.). Teeth 27-1-27, of same type as other species of the 
subgenus (see my paper, I]. c.). I have, however, figured the th tooth 
(pl. xiv, fig. H), to show that here, again, I do not find the character of 
only two cutting points to be constant in the marginals, the outer cutting 
point being trifid in the tooth figured. 
Of Newcombia there was A. venusta, Mighels. There are 24-1-24 
teeth, with about 8 laterals (pl. xiv, fig. D). Here, again, the marginals 
figured are pectinate, though others are simply with two cutting points 
as I formerly (1. c.) supposed the case in all species of this subgenus. 
Jaw slightly arcuate, with blunt ends; a few vertical wrinkles. 
From my finding the variation I have noted above in the marginal 
teeth of Leptachatina and Newcombia, I am forced to doubt the accuracy 
of the distinction in my sections 6 and ¢ (see 1. c). 
There were also specimens of Achatinella auricula, Fér., which is in- 
cluded in Achatinella by Pfeiffer (Mon. VI), but referred by von Martens 
to Partula. The dentition proves it to be an Achatinella, being of the 
same type as Achatinelia s. s., and Partulina. 
Note on the Classification of the Achatelline. 
By THOMAS BLAND. 
In the paper by my friend Mr. W. G. Binney and myself, 
‘¢On the Lingual Dentition and Anatomy of Achatinella and 
other Pulmonata” (Annals X, 1873), we adopted and gave 
particulars of the classification of v. Martens (Die Heliceen, 
ed. 2) and came to the following conclusion, viz., that three 
groups are indicated by the forms of lingual dentition in the 
genus Achatinella. 
a. Partulina, Achatinella s. str. 
b. Newcombia, Laminella. 
c. Leptachatina. 
As regards the subgenera (of v. Martens) not represented 
among shells received from Mr. Gulick, we concluded, judg- 
ing from the shell alone, that Bulimella and Apex belong to 
the group a, and Labiella rather to 6 or c than to a. 
