64 SUPPLEMENT TO ISAAC LEA'S PAPER ON UNIONIDJE. 



and large; outer tip expanded; columella slightly impressed in the middle and 

 slightly twisted. 



Proc. Acad. Nat. Sci., 1869, p. 125. 



Hab. — Hot Springs, Colorado Territory, Prof, J. W. Powell. 



My cabinet and cabinets of Mr. J. Wolf and Academy of Natural Sciences. 

 Diara. *2, Length '3 inch. 



Hemarks. — A number of specimens .were sent to me by Mr. John Wolf, of Can- 

 ton, Illinois, and I name the species after him. Mr. Wolf writes to me that they 

 were collected by Prof. J. W. Powell, of Bloomington, Illinois, and that they were 

 obtained from the Hot Sulphur Springs in Colorado Territory, 6500 feet above the 

 level of the sea. The temperature of the spring where the specimens were taken 

 out was 110°. This species is nearest, perhaps, to Coopeiii, Tryon, from Oregon, 

 but it is larger, more inflated and of a darker color. The aperture is three-fourths 

 the length of the shell. 



Unio Dooleyensis. pi. 22, fig. 60. 



Testa Isevi, oblonga, valde compressa, valde ineequilaterali, postice biangulari, antice rotundata ; val- 

 vulis subtenuibns ; natibus prominulis; epidermide luteo-oliva, obsolete radiata; dentibus cardi- 

 nalibus parvis, in utroque valvulo duplicibus ; lateralibus longis, lamellatis rectisque ; margarita 

 livida et Iridescente. 



Shell smooth, oblong, very much compressed, very inequilateral, biangular be- 

 hind, rounded before ; valves rather thin ; beaks somewhat prominent ; epidermis 

 yellowish-olive, obscurely radiated; cardinal teeth small and double in both valves; 

 lateral teeth long, lamellar and straight ; nacre livid color and iridescent. 

 Proc. Acad. Nat. Sci., 1813, p. 424. 



Hab. — Dooley Co., Georgia, Eev. G. White ; Abbeville, South Carolina, Dr. J. 

 P. Barratt. 



My cabinet and cabinets of C. M, Wheatley and Dr. Lewis, 

 Diam. -6, Length 1-2, Breadth 2 4 inches. 



Shell smooth, oblong, very much compressed, very inequilateral, biangular be- 

 hind and rounded before ; substance of the shell rather thin ; beaks somewhat 

 prominent ; ligament long, thin and dark brown ; epidermis yellowish-olive, ob- 

 scurely radiated, with rather distant marks of growth; umbonial slope oblique and 

 obtusely angular; posterior slope narrow elliptical, rising to a wing, with a slightly 

 impressed groove ; cardinal teeth small, double in both valves and sulcate ; lateral 

 teeth long, lamellar and straight; anterior cicatrices distinct, rather large and well 

 impressed ; posterior cicatrices confluent, large, very slightly impressed ; dorsal 

 cicatrices placed nearly in the centre of the cavity of the beaks; cavity of the shell 



