14 SHELLS OF NEW ENGLAND. 
L. cartosa, Ag. MS. Unio cariosus, Say. Gould, 
fiat: 
L. ocuracea, Ag.. MS. Unio ochraceus, Say. Gould, 
112, f. 74. 
L. ventricosa, Ag. MS. Unio ventricosus, Barnes. — 
Vermont. 
L. stniquomeEa, Ag., MS. Unio siliquoideus, Barnes. 
— Lake Champlain. This is not identical with the 
Ohio River species usually called UW. siliquoideus. 
(Ag.) 
Meraprera, Raf. emend. Gills attached; eggs in 
posterior part of gill; a broad expansion of mantle 
upwards; superanal opening long; both siphonal 
openings fringed. 
M. atara, Ag., MS. Unio alatus, Say. — Lake Cham- 
plain. 
M. cgraciuis, Ag. MS. Unio gracilis, Barnes. — Lake 
Champlain. 
Neither of the above Metaptere is identical with 
the Ohio River species usually designated by the 
same specific name. (Ag.) 
Comp.anaria, Swains. emend. Gills free, united 
to the mantle to its margin; outer gill filling entirely 
with eggs; superanal opening long; both siphonal 
openings fringed; palpi united along their posterior 
edge for two thirds of their length. 
C. rucosa, Ag. MS. Alasmodonta rugosa, Barnes. — 
Vermont. 
C. anasmopontina, Ag., MS. Unio alasmodontinus, 
Barnes. U. compressus, Lea.— Vermont. 
