Description of some new Shells. —— 
rior tipmSinent: dorsal situated horizontally across the cavity of the 
beaks and distinct; cavity of the beaks shallow and rounded ; 
nacre white, siptily iridescent over the entire surface of the 
valve, with faintly impressed strie or rays diverging from the 
cavity of the beaks, and eeraing to the basal margin. Inhab- 
itant unknown.” 
The above eas: is s by Doct, Charles J. Ward, of Roscoe, 
Ohio. 
“ PaLupina “METEROSTROPHA, Kirtland. Plate Il. Fig. 2. 
PSinietral, aperture more than half the length of the shell. 
Shell sub-globose, ovate ; spire depressed, apex generally trun- 
eate ; whorls five; aperture ovate, with its superior extremity 
eurved towards the body whorl, within bluish white ; epidermis 
greenish horn color, usually coated with ferruginous day, Length 
three quarters of an inc 
This shell fagiangheo oecurs in Mill and Yellow creeks, tribu- 
taries of the Mahoning river. 1 formerly considered it a mere 
variety of the P. decisa of Say; but on further examination find 
it to be specifically distinct. It never attains more than half the 
length of that species; its spire Is never Se ang it is al- 
ways heterostrophal.” 
» I am indebted to Doct. J. P. Kirtland be the foregoing de- 
scription. 
- Puysa ‘Sinn, nobis. Plate III. Fig. 3. 
Shell sinistral, ovate; color brownish yellow, or chestnut ; 
whorls five; the first large, the others small, terminating in on 
acute dark besgen apex; aperture large, four fifths of the length 
of the shell ; translucent ; length one inch, breadth seven tenths 
_of an inch. 
I first found this shell, May, 1837, ina small lake called Lake © 
Pipin, which is situated about fifty rods from the Cuyahoga river, 
in Franklin township, Portage county, Ohio, (the same locality 
where was found the Anodonta Pipiniana of Lea.) All the shells 
of this species hitherto found were dead, although much time was 
spent in examining for live ones in May, 1837, and in June, 1838. 
A few only were found, and are in the cabinets of Mrs. Say, 
Ue Kirtland, Doct. Ward, and myself, 
