Jaw and Lingual Dentition of Pulmonata. 170 
Patula Cumberlandiana, Lea. 
Sewanee, Tenn. Dr. Jno. B. Elliott. 
Jaw of the same type as in P. alternata (see Proc. Ac. Nat. Sc. Phila., 
1875, 177, fig. 21). There are coarse vertical striz. 
Lingual membrane (pl. xv, fig. E) long and narrow. Teeth of same 
type as in P. solitaria, alternata, etc. (see same reference, 178). The 
centrals and laterals have, however, a much shorter median cusp. Side 
cusps subobsolete, and side cutting points wanting on the centrals and 
first two laterals, the third lateral beginning to show them; the outer 
laterals, as the seventh lateral etc. (see plate), have them well developed. 
The transition to marginals is very gradual and is not formed by the bifur- 
cation of the inner cutting point, which remains simple to the extreme 
outer edge. The smaller, outer cutting point is sometimes bifid in the 
outer marginals. These last are usually but a simple modification of the 
laterals, as shown (see plate) in the 20th and 30th teeth. 
There are 30-1 -30 teeth, with hardly 13 laterals, and certainly not so 
many absolutely perfect ones. 3 
In P. alternata (see as above, p. 180, pl. vii, fig. 5) there are decided 
prominent side cusps and cutting points to centrals and first laterals. The 
shape of the centrals and first laterals also in alternata, is quite different 
from those of this species. 
The genitalia agree with those of P. alternata figured by Dr. Leidy, in 
Terr. Moll. U. S., I. pl. vii, fig. 2, excepting, perhaps, that in Cumberland- 
tana, the genital bladder is smaller, and its duct longer and narrower. 
For the specimens examined I am indebted to Dr. Elliott, 
ason of the late Bishop Elliott, who so generously contrib- 
uted specimens from southern localities a number of years 
ago, most materially assisting Mr. Bland and myself in our 
studies. 
This species was described by Dr. Lea, from Jasper, Mar- 
ion Co., Tenn. Sewanee, the University Place of Bishop 
Elliott, is in Franklin, the adjoining county. These are the 
only localities of the species thus far known. 
Patula mordax, Shuttl. 
East Tennessee. 
I have lately had an opportunity of examining its genitalia, and find 
them to agree with those of the typical alternata. The dentition is also 
the same (see Proc. Phila. Ac. Nat. Sc., 1875, pl. VII, fig. 7). 
