138 
PROCEEDINGS OF THE ACADEMY OF 
The death of Hon. J. E. Tyson, a member of the Academy, was 
announced. 
The following papers were ordered to be printed in the Proceedings. 
Descriptions of seven new species of Margaritanse, and four new species of 
Anodontse. 
BY ISAAC LEA. 
Margaritana Elliottii. — Testa laevi, elliptica, inflata, postice subrotunda, 
inasquilaterali ; valvulis subtenuibus, antice crassioribus ; natibus prominuliSj 
ad apices paulisper undulatis ; epidermide micante, radiata, vel viridi vel tene- 
broso-fusca ; dentibus cardinalibus parvis, tuberculatis, in utroque valvule 
singulis ; margarita coerulea et iridescente. 
Eab. — Chatahoochee River, near Columbus, Georgia. Bishop Elliott. 
Margaritana triangulata. — Testa l^vi, triangulari, valde inflata, postice 
angulata, subaequilaterali ; valvulis subtenuibus, antice crassioribus ; natibus 
prominentibus, tumidis, ad apices rugoso-undulatis ; epidermide tenebroso-cas- 
taue^, valde radiata; dentibus cardinalibus parvis, erectis, crenulatis, in utroque 
valvulo singulis ; margarita vel alba vel salmonis colore tincta et iridescente. 
Bab. — Upper Chatahoochee, Georgia, Bishop Elliott. Columbus, Georgia. 
Dr. Boykin, and J. Postell. Potato Cr., Georgia, Rev. G. White ; and Sawney's 
Creek, S. Carolina, Dr. Blanding. 
Margaritana connasaugaensis. — Testa la^vi, obovata, postice inflata, antice. 
et postice rotundata, valde inasquilaterali ; valvulis pertenuibus ; natibus promi- 
nulis, ad apices rugoso-undulatis ; epidermide viridi lutea, postice obsolete 
radiata ; dentibus cardinalibus parvis, tuberculato-compressis, in utroque val- 
vulo singulis ; margarita coeruleo-alba et iridescente. 
Hab. — Connasauga River, one of the head waters of the Alabama River, in 
Gilmer Co., Georgia. Bishop Elliott. 
Margaritana etowahensis. — Testa laevi, elliptica, subcompressa ad lateris 
planulatis, insequilaterali ; valvulis tenuibus, antice paulisper crassioribus : 
natibus prominulis, ad apices rugoso-undulatis ; epidermide luteola, postice 
obsolete radiata ; dentibus cardinalibus parvissimis, erectis, tuberculato-com- 
pressis, in utroque valvulo singulis ; margarita coerulea et iridescente. 
Hab. — Tennessee, Dr. Troost ; Etowah River, Georgia, Rev. G. White. 
Margaritana Gesnebii. — Testa sulcata, quadrata, inflata, postice obtuse 
angulata, subcequilaterali ; valvulis subcrassis, antice crassioribus ; natibus 
subprominentibus ; epidermide tenebroso-fusca, micante, obsolete radiata ; 
dentibus cardinalibus parvis, Isevibus, subcompressis, in utroque valvulo unicis : 
margarita alba. 
Hab. — Uphaupee Creek, Alabama, below Columbia, Georgia. W. Gesner and 
G. Hallenbeck. 
Margaritana tombecbebnsis. — Testa laevi, elliptica, inflata, postice obtuse 
angulata, antice rotundata, subaequilaterali ; valvulis subtenuibus ; natibus 
prominentibus, tumidis, ad apices undulatis ; epidermide tenebroso-oliva, obso- 
lete radiata ; dentibus cardinalibus parvis, tuberculatis ; margarita alba. 
Hab. — Tombecbee River, near Columbus, Mississippi. Wm. Spillman, M. D. 
Margaritana Spillmanii. — Testa laevi, obovata, antice valde inflata, postice 
subbiangulata, inaequilaterali ; valvulis subtenuibus, antice crassioribus ; nati- 
bus prominentibus, tumidis, ad apices rugoso-undulatis ; epidermide rufo-fusca, 
eradiata ; dentibus cardinalibus parvis, tuberculato-compressis, in utroque val- 
vulo singulis ; margarita alba et iridescente. 
Hab. — Tombecbee River, near Columbus, Mississippi. Wm. Spillman, M. D. 
Anodonta Hallbnbbckii. — Testa sulcata, arcuata, valde inflata, postice et an- 
tice rotundata, inaequilaterali ; valvulis subtenuibus, antice paulisper crassiori- 
[Junc, 
