Dentition of Pulmonate Mollusks. 103 



On PL VII, fig. I, I have figured the lingual dentition of this slug, whose 

 specific name is unknown to me. There are 58-1-58 teeth. 



The dentition is of the same type as described in the genus by Heyne- 

 mann, Malak. Blatt., X, 1863, p. 138. 



Carelia, 



Carelia bicolor, Jay. Dr. W. H. Dall. 



Through the kindness of Dr. Dall, I have been able to examine this spe- 

 cies, formerly known as Achatina bicolor. Thus I have increased the list of 

 subgenera or groups of Achatinella of Gulick's arrangement, whose jaw and 

 lingual dentition is known, leaving still to be examined Newcombia only of 

 the same arrangement. (See ante, p. 96.) 



It will be seen from my description, that while Carelia (or at least this 

 species) differs utterly in jaw and dentition from Gulick's Achatinella, s. s., 

 Bidimella, Apex,, Partulina, Auriculella, it agrees in dentition with his Laminella, 

 Amastra, Leptachatina, but differs in having a costate jaw. Carelia, there- 

 fore, must stand distinct from any other groups of Achatinella. 



The jaw (PL XVI, fig. D) is low, slightly arcuate, with but little attenu- 

 ated, blunt ends ; anterior surface with ten stout ribs, denticulating either 

 margin. 



Lingual membrane (PL VI, fig. I) long and narrow; teeth 37-1-37, of same 

 type as in the species of Laminella, Newcombia, and Leptachatina (see above), 

 the marginals being irregularly and obliquely pectinate as in Achatinella obesa. 



Gcomalacus. 



Geomalacns maculosas, Allm. Ireland. Mr. Gwynn Jeffreys. 



Jaw stout, arched, ends not attenuated, blunt; anterior surface with about 

 twelve, broad, crowded ribs, of which four in the centre are more developed 

 and deeply denticulate either margin. 



Lingual membrane (PL III, fig. H ; centrals with long and narrow base 

 of attachment; reflection large, with a stout median cusp bearing along, 

 stout cutting point; side cusps obsolete; laterals like the centrals, but asym- 

 metrical ; marginals to the extreme edge of the membrane a simple modifi- 

 cation of the laterals, low, wide, with one inner, long, oblique cutting point, 

 and a smaller, side cutting point. 



Veronieella. 



See Terr. Moll., V, for a description of jaw and lingual mem- 

 brane of the genus. The following species agree in lingual 

 dentition : — 



Veronieella occidentalis, Guild. Guadeloupe. Mr. Schramm. 



Jaw with about 30 ribs. 



