Dentition of Pulmonate Mollusks. So 
— Nanina leucostyla, Ptr. 
Nanina rufozonata, WH. Ad. 
From Mauritius, prove also to belong to Naniua. 
| Nanina radians, Ptr. (Microcystis). Rarotonga Island. 
tevin. A: Garrett. 
| Plate XVII, fig. P, represents one central, lateral and marginal tooth. 
_ There are 40-1-40 teeth, cight on each side being perfectly formed laterals. 
_ The marginals are sometimes trifid. 
 Nanina conula, Pease. Island of Huahine. Mr. A. Garrett. 
Central and lateral teeth as in N. radians, Pfr. (See above.) . Lateral 
| teeth, seven in number on each side. Marginals aculeate, multifid, very 
- numerous. 
Nanina calculosa, Gould. Island of Huahine. Mr. A. 
| Garrett. . 
Jaw as usual in the genus. Lingual membrane long and narrow. Teeth, 
| 88-1-88. Centrals and (7) laterals asin WV. radians. (See above.) The lat- 
| ter, however, have slightly developed inner side cutting points. First 15 
marginals bifid, the rest multifid. 
im Nanina Cressida, Gould. Island of Huahine. Mr. A. 
Garrett. 
Jaw arched, high; ends blunt; cutting-margin with a median beak-like 
projection. 
Lingual membrane (Pl. XVII, fig. Q) with 55-1-55 teeth. The bifurcation 
| of the cutting-point of the marginals commences in the 11th tooth. There 
are no side cusps to the centrals and laterals, which have a long, narrow 
base of attachment on each side. I figure one central, one lateral and one 
marginal tooth. 
: 
Nanna Chamoissi, Pfr. West Maui, Sandwich Islands. 
~ Gulick. 
Pl. XVII, fig. O. The marginal teeth have three or four points. An un- 
identified species from Oahu has similar dentition. 
Nanina subcircula, Mousson. Raiatea, Society Islands. Mr. 
Garrett. 
‘Lingual membrane (PI. II, fig. A) as in the other species. 
Nanina cultrata, Gould. 
Lingual membrane as usual in the genus. Laterals six on both sides; 
extreme marginals multifid. 
Nanina Calias, Benson. Foot of Himalayas. Mus. Comp. 
| Zool. 
