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. V 



Hydra viridis 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 Turbellarkms there were several species. Ainia calva is 

 infested by a tape worm and by a Disfonnivi. 



NEMATHELMIA. 



No attempt was made to collect thread worms. Gordlii--< 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 BESSIE C. EIDGLV. 



No Chaetopoda were collected. 



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

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

 Verrill. 



Xephelis qiiadriMriafa Grube. Thirteen specimens from Turkey Lake. 



yeplielis fervida Yerrill. Fourteen specimens. 



Clepsine parasitica Diesing. Three specimens. 



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

 Two specimens were taken in Tippecanoe Lake. 



Clepsine ornata rugosa Verrill. Four specimens. 



Clepsine ornata variety d Verrill. Ten large sijecimens corresponding with 

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



Clepsine papillifera Verrill. One specimen. 



Clepsine papillifera carinata Vei'rill. 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 elef/ans Verrill. Five specimens. 

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