234 Descriptions of Shells found in Connecticut. 
is a denizen of the streams west of the Alleghanies and of Lake 
Champlain, its occurrence in this connection may have some bear- 
ing upon ethnography. 
Cycias truncata. (No. 82.) Testa 
parva, tenui, fragili, ventricosa, aubeoat 
laterali, transverse rotundato-ovat , pos- 
tice dil: tata, et late saberipeari,, ‘lineis 
epidermide olivaceo-cornea induta ; um- 
bonibus magnis et perelevatis : eGlitiie 
cardinalibus minutis, obtusis; dentibus 
age nia ee Se slant Fig, 3. 
ong. t at. ., 4 Cyclas ‘truncata. 
; Shell sinall, hae “fragile, ‘inflated, slightly inequilateral, trans- 
Ge. versel’ rounded-oval, ‘broadest and somewhat abrupt so as to ap- 
, aah almost truncated posteriorly. Beaks tumid and prominent. 
ufface finely and regularly striated by the lines of growth. 
Epidermis pale horn-color, approaching to olive. Hinge teeth ob- 
tuse, owed minute ; lateral teeth elongated and well developed. 
This is a well marked species, more similar in its structure to 
C. petieneip Flan. to our other species, but yee Petingaished 
by its elevated beaks, narrow and rounded anterior: 
ened and partially truncated posterior extremity, and 
being placed so much anteriorly as to place it, I doubt not, in the 
genus Pisidium 
ANODONTA Hovsaronica. (No. 112.) Testa oblonga, retror- 
sum dilatata, antrorsum compresso-cuneata ; margine antica ro- 
tundata, basali areuata, Negrete obliqua et ad apicem truncata, dor- 
ue 4. 
sali rectilineari : umbonibus parvis,. undulatis, ad. sect emt. ant 
orem Si sitis: valvis postice tumidis, ata nina: tole ( 
shdittis : intus lactea, salmonaceo sti 
crassato. Figs. 4 and 5 ' “i 
hs 
