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 urceolarts, 

 Weismann — is often found attached to this animal. 



III. Genus Scapholeberis. 



S P- 3- Scapholeberis mucronata* 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- SimocevhalllS uetltlus. 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 pulex, 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 p md 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. 



