ENTOMOSTRACA OF MINNESOTA. 275 
Alona affinis Leydig. 
Alona afinis—C. L. Herrick, Final Report on Minn. Crust., p. 98; Pl. F, Fig. 14. 
Length 0.79 mm.; height 0.46 mm. The specimens here tabulated 
are smaller than those found by other writers; but since they agree in 
all essentials with A. affinis they are placed here. In all probability 
they are immature individuals. Habitat: Kent county, Delaware; 
Fayetteville, Georgia. 
Alona porrecta Birge. 
Alona porrecta—E. A. Birge, Notes on Clad., p. 29; Pl. I, Fig. 16. 
Length 0.37 mm. to 0.58 mm.; height 0.22 mm. to 0.24 mm. Habi- 
tat: Atlanta, Georgia; Cincinnati, Ohio. 
Alona glacialis Birge. 
Alona glacialis—E. A. Birge, Notes on Clad., p. 30. 
Habitat: Cincinnati, Ohio. Rare. 
Alona intermedia Sars. 
Alona intermedia—C. L. Herrick, Final Report Minn. Crust., p. 101; Pl. I, Fig. 15. 
Habitat: Cincinnati, Ohio. 
GENUS PLEUROXUS Miller. 
Pleuroxus acutirostris Birge. 
Pleurocus acutirostris—E. A. Birge, Notes on Clad., p. 23; Pl. II, Fig. 15. 
This species seems to be very rare. I have only encountered it 
once. Then it was associated with Pleuroxus hamatus Birge, which it 
closely resembles in shape. The specimen resembled in all respects 
the specimens described by Professor Birge. Habitat: Atlanta, 
Georgia. 
Pleuroxus hamatus Birge. 
Pleurowus hamatus—E. A. Birge, Notes on Clad., p. 22; Pl. II, Figs. 13, 14. 
Length 0.46 mm. to 0.52 mm.; height 0.23 mm. to 0.33 mm. Habi- 
tat: Cincinnati, Ohio; Atlanta, Georgia. Im the northern part of 
Georgia specimens of this species are more plentiful than those of any 
other member of this genus. 
Pleuroxus denticulatus Birge. 
Pleuroxus denticulatus—E. A. Birge, Notes on Clad., p. 20; Pl. I, Fig. 21. 
Length 0.57 mm.; height 0.43 mm. Habitat: Cincinnati, Ohio; 
Kent county, Delaware; Atlanta, Georgia. 
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