164 Trans. Acad. Sci. of St. Louis. 
caudo-ventral angle; on the caudal margin, near the caudo-ventral 
angle, are several small bristles; the claws are slightly flexible and 
bear neither spines nor teeth; but, on their caudal margins, there are 
several bristles. . . 
Habitat: © Augusta, Ga.; shallow marsh with a grassy 
bottom and a water temperature of 12° C.; collected Jan- 
uary 23, 1908. Besides the Entomostraca mentioned in 
the table, associated with it were gammarids, Asselidae, 
hydrachnids, ete., but no filamentous algae. The grass 
was dead. 
ACANTHOLEBERIS Lilljeborg. 
28. ACANTHOLEBERIS CURVIROSTRIS O. F. M. 
Acantholeberis curvirostris, Herrick & Turner, ’95, p. 218; pl. 
XLVL, fig. 1-4. 
This rare form was found, on only one occasion, in a 
hole fed by the overflow from Butler’s Creek. The tem- 
perature of the water was 8° C. To the best of my know- 
ledge, this is the first time that this form has been found 
in America. 
ILYOCRYPTUS. 
29. ILYOCRYPTUS SPINIFER Herrick. 
Ilyocryptus longiremus, Birge, ’91, pp. 392-393; pl. XIII., fig. 18. 
Ilyocryptus spinifer, Herrick & Turner, ’95, pp. 221-223; pl. LV., 
fig. 1-4; pl. LVI., fig. 18, 19, 21. 
Near Augusta, this species is rare. The water in 
which it was found had a temperature of 6° C. 
EURYCERUS Baird. 
30. EURYCERUS LAMELLATUS QO. F. M. 
Pl. XXXVIII. f. 2. 
Eurycercus lamellatus, Herrick & Turner, ’95, p. 226; pl. XLVI., 
he 7 8: pi LY Ge. 62 pl. L.,; ‘fig. 6,6: pl. DAR, fie 4h 
In Butler’s Creek and in the ponds fed and drained 
by it, this species is abundant, when the water tempera- 
ture ranges from 4° C. to 8° C. 
In addition to the Entomostraca mentioned in the table, 
associated with it were gammarids, ayy larvae, diving 
beetles, and hydrachnids. 
