OF DENISON UNIVERSITY." 67 
occupy the bottom lands upon either side of the Ohio River. Ephip- 
pial females appear about the middle of September. 
A certain species of Brachionus — probably Brachionus urceolaris^ 
Weismann — is often found attached to this animal. 
III. Genus Scapholeberis. 
Sp- 3- Scapholeberis jriueronata^ Mueller. 
Scapholeberis mucronata. ''' -'■ C. L. Herrick, Final Report 
on Minn. Crustacea, p. 42; pi. J, fig. 5. 
This species is abundant in all of our ponds. 
The brood cavity usually contains two embryos, each of which is 
about as long as that cavity. The head of one embryo is directed 
caudad, while the head of the other is directed cephalad. 
Ephippial females appear about the latter part of September. 
IV. Genus Simocephalus. 
Sp. 4. Simocephalus Vetulus. Mueller. 
Simocephalus vetulus, C. L. Herrick, Final Report on 
Minn. Crustacea, p. 46. 
This species is abundant in all of our canal basins and in many 
of the ponds that contain plant life. It varies in hue from almost 
colorless to a brick red. 
V. Genus Daphnia. 
Sp. 5 Daphnia puleoc, Mueller. 
Daphnia pulex, C. L. Herrick, Final Report on Minn. 
Crustacea, p. 56. 
This species is very abundant and is found in the same situations 
as Moina paradoxa^ Weismann. They are fond of foul water and a 
dump pond is sure to be filled with them. The body is often covered 
with Vorticellidae and other Infusorians. 
Ephippial females appear about the middle of September. 
Family LYCEIDAE. 
Sub-family LYCEINAE. 
VI. Genus Lynceus. 
Sub-genus Alona. 
Sp. 6. Alona porrecta, Birge. 
Alona porrecta, C. L. Herrick, Final Report on Minn. 
Crustacea, p. 99. 
