FRESH WATER AND LAND SHELLS. 21 



Unio Kleinianus. PL XVII. Fig. 18. 



Testa pUcali'i, (riiinifnlari, cotnprrssci, ad hi/ere planulutfi, inaeqinlaterfili, poslice obtuse ungiihila ; valvulis 

 subcrassh : ntilibus subprominenlibus ; epiclennide tencbroso-fuscii ; dentibus cardinalibus crassia crcmitatis- 

 fjiic; laterulibus brevis reclisgue; margaritd alba el Iridescenle. 



Shell plicate, triangular, compressed, flattened on the side, inequilateral, obtusely angular behind; valves rather 

 thick; beaks somewhat prominent; epidermis dark-brown; cardinal teeth thick and crenulate; lateral teeth short 

 and straight; nacre white and iridescent. 



Hab. Suwanee river, Florida, Major Lc Conte. 



My cabinet and cabinet of Major Le Conte. 

 Diam. .8, Length 1.2, Breadth 1.6 inches. 



Shell plicate, triangular, compressed, flattened at the side, inequilateral, obtusely an- 

 gular behind, enlarged over the uinbonial slope; substance of the shell rather thick, thinner 

 behind; beaks somewhat prominent; epidermis dark-brown, with marks of growth rather 

 distant; ligament short and thick; folds irregular, small and extending nearly over the 

 whole disk, on the posterior slope more regular and nearly parallel; posterior slope large, 

 and raised into a carina, umbonial slope obtusely angular; cardinal teeth thick, large, 

 crenulate and double in both valves; lateral teeth short and straight, separated from the 

 cardinal tooth by a rather large plate; anterior cicatrices distinct; posterior cicatrices 

 distinct; palleal cicatrix well impressed; cavity of the shell rather deep and rounded; 

 cavity of the beak deep and acutely angular; nacre white and iridescent. 



Remarks. — A new plicate species is rather a rare acquisition, and I believe this is the 

 first from Florida. Major Le Conte, I believe, procured but two specimens, both of which 

 are before me. In outline and size it is allied to U. infucaltis, Con., which, however, is 

 not figured as a folded shell by him. It differs, however, in having larger folds, which 

 are more interrupted, and in the colour of the epidermis, which, in infucaltis, when old, is 

 almost, if not quite, black. The folds in Kleinianus are very irregular, and so much 

 broken up as to have the appearance, on part of the disk, of being nodules. The beaks, 

 'unfortunately, of the two specimens are much eroded, and their characters, therefore, not 

 known. I should suppose that, in perfect or young specimens, the folds would extend to 

 the apex, and present a fine appearance. 



This interesting species I dedicate to Klein, the author of Teslamen Mclliodi, 1773, who 

 was in advance of most of the conchologists of his day. 



Unio satur. PI. XVIL Fig. 19. 



Testa lasvi, Irian gulari, valdi injlata, insequilaterali, postice truncald; valvulis crassis; natibits maximis, 

 iijlatis, rotundatis; epidermide tenebroso-fuscd, polild ; dentibus cardinalibus magnis, compressis, obtiijuis, 

 uc.uminalis ; crennlatis ; laterulibus longis, lamellutis subcurvisque; margaritd albd et iridtscente. 



Shell smooth, triangular, very much inflated, inequilateral, truncate behind ; valves thick ; beaks large, inflated 

 and rounded; epidermis dark-brown, polished; cardinal teeth large, compressed, oblique, acuminate, crenulate; 

 lateral teeth long, lamellar and curved ; nacre white and iridescent. 



Ilab. Alexandria, Louisiana, J. Hale, M. D. Lake Calcashue, near New Orleans, 

 Mr. Anthony. 



My cabinet and cabinets of Dr. Ilalc and Mr. Anthony. 

 Diam. 2.1, Length 2.5, Breadth 3 inches. 



