440 CRUSTACEA [November, 



In considerable numbers, in small shallow pools of 

 fresh water. The specimens here described were found 

 in Georgia and East Florida. 



Genus DAPHNIA. 



Shell bivalve; head distinct; antennae generally four> 

 ramose; feet eight or twelve; eye one. 



SPECIES. 



1. D. angulata^. Body viewed laterally suboval, con- 

 tracted before, gibbous above near the posterior edge, 

 beneath ventricose in the middle; back subovate, acute 

 behind and contracted before; sides striate with numerous, 

 minute, parallel, oblique lines; hind edge of the body 

 with a prominent angle in the middle, which is obtuse at 

 tip, above the angle it is ciliated; antennce^ four filaments 

 on the superior branch, and five on the inferior branch; 

 colour white or red. 



Length one tenth of an inch. 



Cabinet of the Academy. 



Very common in the stagnant marsh water of the 

 forests in the southern states. ^ 



2. D. rofundata'^. Body viewed laterally ovate, nar- 

 rowed before, rounded behind, and destitute of any 

 prominent angle, and of gibbosity above; lateral oblique 

 lines obsolete; venter deeply ciliated; antenna, superiores 

 three-branched, a small spine above at the insisures of the 

 joints, inferiores five- branched; colour white. 



Less than half as large as the preceding. 



Cabinet of the Academy. 



