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Dentition of Pulmonate Mollusks. 
AGNATHA. 
Chiamydephorus. 
Ohlamydephorus Gibbonsi, W. G. Binney. Natal Colony, 
Africa, Mr. J. 8. Gibbons. 
The lingual membrane is long and broad, consisting of about 52 chevron- 
shaped rows of 27-1-27 teeth, all as in Glandina, the central one differing 
only in being smaller than the adjacent marginals, and symmetrical, with a 
long, slender cutting point ; there are no laterals, all the side teeth being 
purely aculeate marginals, and first rapidly increasing and then gradually 
decreasing in size as they pass off laterally, as is usual in Glandina. Buccal 
mass very large indeed. (Pl. XVII, fig. A.) 
The plate shows the central and three adjacent marginal 
teeth, the eighth murginal, aud the twenty-third to the twenty- 
seventh, which is the last. 
Glandina. 
For the deseription of the dentition of the genus, see Terr. 
Moll. U.S., V. All the species examined by me agree with it. 
There are no lateral teeth. 
Glandina semitarum, Rang. (Varicella), Martinique. Goy. 
Rawson. 
There are about 30-1-39 teeth. The central is long, narrow, and sharply 
pointed. “(Plate XVII, fig. C.) 
Glandina Phillipst, Ad. ( Varicella.) Jamaica. 
As in the last species; Pl. XVII, fig. D, shows an outer mar- 
ginal. ‘There is a peculiar notch in the upper edge of the base 
of attachment. 
Glandina rosea, Fer. Nicaragua. Mr. MeNiel. 
Membrane with 86 rows of 25-1-25 teeth. Centrals long, narrow, slightly 
incurved at sides, emarginate at top, rounded at base, and bearing a short, 
blunt, stout, cutting point. (Pl. XVII, fig, B.) 
Glandina aurata, Mor. Costa Rica, Dr. W. M. Gabb. 
Referred to as an undetermined species in Ann. N. Y. Ac. Sci. 
il, eM | 
Teeth, 36-1-36. The central tooth has a long slender cutting point. 
(Pl. XVII, fig. E.) The central tooth and first four marginals. 
