241 



PORIFERA. 

 Sponges are not abundant in the lake. They are found in small patches on 

 boards, sticks and other things near the margins of the lake. They grow much 

 more luxuriantly in the outlet of the lake where they sometimes form patches 

 several square feet in extent. 



CNIDARIA. 



Hydra viridk L. Specimens of hydra were exceedingly rare. On one occasion 

 a few were taken on a submerged stick near Black Stump Point. . 



PLATHELMINTHES. 



Flat worms were not systematically collected and none of these collections 

 have been identified. Of Turbellarians there were several species. Ainia calva is 

 infested by a tape worm and by a I>iKfonr}nii. 



NEJIATHELMIA. 



No attempt was made to collect thread worms. Gordiux is exceedingly 

 abundant on the margins during the latter part of summer. I counted as many 

 as twelve in the area of one foot square. 



ANNELIDA. BY HESSIE C. RIDGl.V. 



No Chactopoda were collected. 



No systematic attempt was made to get large numbers of leeches, but speci- 

 mens were preserved whenever found. In the classification 1 have followed 

 Verrill. 



Nephelin quadristriata Grube. Thirteen specimens from Turkey Lake. 



Ncphelis fervida Verrill. Fourteen specimens. 



Clepsine parasitica Diesing. Three sjiecimens. 



Clepsine ornata stellata Verrill. This species was not found in Turkey Lake. 

 Two specimens were taken in Tippecanoe Lake. 



Clepsine ornata ruf/osa Verrill. Four specimens. ' 



Clcpdne ornata variety d Verrill. Ten large specimens corresponding with 

 the second specimen described by Verrill were found, most of them on turtles. 



Clepsine papillifera Verrill. One specimen. 



Clepsine papillifera carin<da Verrill. Three specimens. One of these, one- 

 half inch long, was found under a stone in front of the laboratory. A number of 

 young were attached to it. 



Clepsine pallida Verrill. One specimen. 



Clepsine pallida variety b Verrill. One specimen. 



Clepsine eler/ans Verrill. Five specimens. 

 (.16) 



