U N I 0. 



Specie^ SS. (Miis. Ciiiuini]!.) 



Unio Buddianus. Un. testa, elongato-obloiigd, gibbosd, 

 antiee brevissimS, rotundatd, postice angulato-prodiicld, 

 ad extremitatem oblique subquadratd ; nigrd. 



Bldd's Unio. Shell eloiipjately obloiip;, gibbous, anteriorly 

 very short, rounded, posteriorly angidarly produced, 

 obliquely subquadrate at the extremity ; black. 



Lea, Trans. Anier. Phil. Soc. 1843; Obs. vol. iv. p. 33. 

 pi. 40. f. .5. 



Ilab. Florida, North America. 



A black shell, obliquely subquadrate at the posterior 



extremity, the angle being conspicuous, but rather obtuse. 



Species 89. (Mas. Cuming.) 



Unio cucumoides. Uh. testa elongalo-oblongd, antice 

 brevi subattemiato-rotundatd et concentrice rugosd, 

 postice oblique subquadratd, valde produdd, midique 

 ■peculiariter corrvgato-verrucosd ; nigrd. 



The cucumber-like Unio. Shell elongately oblong, 

 anteriorly short, somewhat attenuately rounded, and 

 concentrically wrinkled, posteriorly obli(piely sub- 

 qnadrate, very much produced, peculiarly coiTugately 

 w;irted throuc'hnut : lilnck. 



Lea, Trans. Araer. Phil. Soc. 1S40; 01)s. vol. iv. p. 311. 



pi. 7. f. 3. 

 Hub. Hunter's liiver, New South Wales. 



A bold, black species, considerably obliquely produced 

 on the posterior side, where it is sculptured nith diversely 

 radiating wrinkled warts. 



Species 90. (Mus. Cnniiiig.) 



Unio SiiEPAEniANUs. Un. testa flexuoso-lanceolatd, me- 

 dio covipressd, antice brevissimd, rotundatd, postice 

 valde product a, obtuse angulatd, delude acuminata; 

 nigrd. 



Shepakd's Unio. Shell fle.\uously lanceolate, com- 

 pressed in the middle, anteriorly very short, rounded, 

 posteriorly very much prod\iccd, obtusely angled, 

 then acuminated ; black. 



Lea, Trans. Amer. Phil. Soc. 1834; Obs. vol. i. p. 307. 

 pi. 13. f. 38. 



Hub. Georgia, North America. 



Curiously distinguished by the narrow, llexuous jiro- 



longation of the posterior side. 



January, 1865. 



