YS Dentition of Pulmonate Mollusks. 
The lingual dentition in this section is entirely different from 
that in the last. The membrane islong and narrow. The trans- 
verse rows of teeth are horizontal, not en chevron. ‘The teeth 
are like those usually found in the Pulmonata, with quadrate 
base of attachment and tricuspid centrals, bicuspid laterals, bi- 
cuspid, multicuspid, or even pectinate marginals. ‘The centrals 
are very much smaller than the laterals, both in height and 
width. 
Newcombia picta, Mighels. W. Maui. 
Jaw described above. Lingual membrane, Pl. VI, fig. B. The margin- 
als have two cutting points, each point becoming bifid as the teeth pass off 
laterally. . 
Newcombia venusta, Mighels. 
Jaw slightly arcuate, with blunt ends; a few vertical wrinkles. 
Lingual membrane (PI. VI, fig. A) shown in all its changes. The mar- 
ginals are decidedly pectinate in the teeth figured, but some are seen with 
only two cutting points. Teeth 24-1-24, eight being laterals on each side of 
the median line. 
Laminella Mastersi, Newe. West and Kast Maui. 
Jaw described above. (Pl. XVI, fig. E.) 
Lingual membrane (Pl. VI, fig. E) with simply two or three cutting points 
to the marginals. A group of these latter, and of centrals and laterals, is 
given. 
Laminellu obesa, Newe. 
Lingual membrane (Pl. VI, fig. C) with 27-1-27 teeth, of same type as in 
the last species. 
The tooth shown in the figure is the 19th, a marginal, with one large, 
inner cutting point, and three very small outer ones. On the same mem- 
brane, however, are some marginals having three cutting points and some 
which are quite pectinate. This variation shows that my distinction be- 
tween b and ec, in my former paper, referred to above, was not well founded, 
The jaw is as in A. Mastersi. 
Laminella decorticata, Gulick. Oahu. 
Lingual membrane (PI. VI, fig. D) as in Mastersi. 
Laminella luctuosa, Pfr. Oahu. 
Lingual membrane (Pl. VI, fig. F) as in Mastersi. 
Laminella nigrolabris, Smith. Oahu. 
Lingual membrane as in Mastersi, 
Leptachatina nitida, Newe. W. Maui. 
Lingual membrane (PI. VI, fig. H), marginals pectinate, 
