166 
PROCEEDINGS OF THE ACADEMY OP 
Unio Prattii. Testa laevi, obovata, subinflat^, postice et antice rotundata, in- 
asquilaterali ; valvulis subtenuibus; natibus subprominentibus, crasse undulata ; 
epidermide tenebrosa, valde radiata ; dentibus cardinalibus parviusculis, crenu- 
latis, obliquis, in utroque valvulo duplicibus ; lateralibus sublongis subrectisque ; 
margarita alba et iridescente. 
Ifa5.— Ohatahoochee River, at Roswell, Cobb Co., Georgia, N.A.Pratt, Jr.; 
and Tobesauflce Creek, near Macon, Georgia, Bishop Elliott. 
Unio Chattanoogaensis. Testa laevi, obliqua, cuneata, scalenia, subinflata, 
antice decisa ; valvulis percrassis, antice crassioribus ; natibus elevatis, incur- 
vatis, fere terminalibus ; epidermide luteo-oliva, transverse virido-vittata ; den- 
tibus cardinalibus aliquantulum parvis, erectis ; lateralibus, sublongis, crassis 
subcurvisque ; margita argentea et iridescente. 
Hab. — Chattanooga, Tenn., T. Stewardson, M.D. Etowah River, Rev. G. White. 
Coosawattee and Oostanaula Rivers, Georgia, Bishop Elliott. 
Unio Downiei. Testa Isevi, elliptica, inflata, postice subbiangulata, inaequi- 
laterali ; valvulis crassis : natibus prominulis ; epidermide tenebroso-fusca, 
cjtriata ; dentibus cardinalibus subgrandibus, crenulatis, in utroque valvulo sub- 
duplicibus ; lateralibus sublongis, crassis subcurvisque: margarita. purpurea et 
iridescente. 
Ilab. — Buck Lake, an enlargement of Satilla River, Georgia. J. C. Downie, 
and J. Postell. 
Unio Satillaensis, Testa la3vi, elliptica, inflatii, postice subbiangulata, valde 
inaequilaterali ; valvulis subcrassis ; natibus prominulis ; epidermide nigricante, 
minute transverse striata ; dentibus cardinalibus magnis, subcompressis, eleva- 
tis, in utroque valvulo duplicibus crenulatisque ; lateralibus longis, crassis sub- 
curvisque ; margarita purpurea et salmonis colore tincta et iridescente. 
Eab. — Satilla River, Camden Co., Georgia. T. C. Downie. 
Unio Hazlehurstianus. Testa laevi, transversa, subcylindracea, postice bi- 
angulata, valde inaequilaterali ; .valvulis subtenuibus ; natibus prominulis ; epi- 
dermide nigricante, subtilite striata ; dentibus cardinalibus parvis, tuberculatis ; 
lateralibus praelongis, lamellatis subrectisque ; margarita purpurascente et 
valde iridescente. 
Hab. — Satilla River, Camden Co., Georgia. T. C. Downie. 
Melania Postellii. Testa granulata, attenuata, subtenui, cornea, inferne 
transverse striata ; spira elevata ; suturis irregulariter irapressis ; anfractibus 
subplanulatis, instar octonis ; apertura parva, elliptica, intus albida; labro acuto : 
columella torta. 
Hab. — Altamaha River, Georgia. James Postell. 
Paludina Elliottii. Testa subcarinata, pyramidata, subcrassa, viridi-oliva, 
arctissime umbilicata, laevi ; spira elevata, subacuta, ad apicem carnea; suturis 
excavatis ; anfractibus septenis, rotundata, superne obtuse carinatti, ultimo 
parviusculo ; apertura subrotundata, parva, intus albida. 
Hab. — Othcalooga Creek, Georgia. Bishop Elliott. 
Lymnba Haydenii. Testa ovato-conica, lajvi, tenui, pallido-cornea, imperfo- 
rata ; spira breviuscula \ anfractibus quinis, convexis ; suturis valde impressis ; 
apertura ovata ; columella fortiter plicata. 
Hab. — Yellowstone and Big Sioux Rivers. Dr. Hayden. 
Ancylus Newberryi. Testa magna, obtuse pyramidata, opaca, rufo-fusca, 
ad lateris paulisper compressis ; vertice subcentrali ; apertura elliptica. 
Hab. — Klamath Lake, California. J. S. Newberry, M. D. 
[July, 
