Jaw and Lingual Dentition of Pulmonata. 188 
Lingual membrane (pl. xiv, fig. E) as usual in the genus. Centrals 
with the base of attachment very much larger than that of the laterals, 
and with an enormous, single, broad, long, rapidly and obtusely pointed 
cutting point. No side cusps or side cutting points. Laterals of the form 
usual in the Helicinw, with a stout, inner cusp, bearing a broadly truncated, 
short cutting point, and a small side cusp bearing a short cutting point. 
The change from laterals to marginals is shown in the 10th, 15th and 
27th teeth in the plate. 
The marginals (28th and 68th teeth in the plate) have a long, narrow 
base of attachment, which near its lower margin bears a short, slightly 
expanding, bluntly trifid cusp: from this cusp springs a short, expanding, 
bluntly denticulated, broad, cutting edge, the inner denticle the largest. 
This cutting edge is shown in the 67th and 68th teeth on a more enlarged 
scale. There is great variation in the denticulation of the cutting edge. 
There are 68-1-68 teeth. : 
The peculiarity of this membrane is the enormous development of the 
central tooth. 
I have (1. c.) given figures of the dentition of A. patula, 
Brug., of St. Kitts and of Dominica, of A. appendiculata, 
Pfr. of Guadeloupe, and of A. rubescens, Fér. of Martin- 
ique.* Dr. Fischer (Journ. de Conch. XXII, 1874, pl. v), 
figures that of A. depressa of Guadeloupe, and A. patula of 
Guadeloupe. 
Dr. Fischer also (1. c.) figures the dentition of A. rubes- 
cens. He gives inner side cutting points to the lateral teeth 
which I did not find in my specimens. His figure of the 
dentition of the Guadeloupe A. patula is certainly specifi- 
cally distinct from the St. Kitts and Dominica form. It 
seems as if there were the following distinct species of 
Amphibulima: depressa, appendiculata, rubescens, patula of 
Guadeloupe, patula of St. Kitts and Dominica and Rawsonis. 
It is with extreme regret that I find the Amphibulime still 
treated as species of Suceinea by Dr. Pfeiffer in vol. VII of 
his Monographia, even as late as the present year. Messrs. 
Fischer and Crosse, as well as Mr. Bland and myself, have 
* My friend Mr. Bland and myself were indebted to Gov. Rawson of Barbados, for 
specimens of this last, as well as for many other valuable West Indian species. The 
sense of our great obligation to him is increased at this moment by hearing that he 
has left Barbados to settle permanently in England. 
