1 86 Colic (J c of Forestry 



not live in Lower South Bay, but that they were not sought 

 for the present investigation. A rich fauna of these small 

 animals probably lives in the plankton, llie field numbers 

 for the associated animals are given in Tables No. 16-35. 



PHYLl'M PORIFERA 



Family Spgngillid.i-: 



Spongilla lacustris (Linn.). Heteromyenia repens Potts. 



Spongilla fragilis Leidy. 



Sponges were common in many parts of Lower South 

 Bay, particularly on the stony points and exposed shores 

 where Spongilla fragilis, of a vivid green color, covered the 

 boulders in masses. These animals were observed living in 

 water 2)/ to 4 feet deep, but gemmules of Spongilla fragilis 

 were collected at a depth of 14 feet. The three species listed 

 are among the commonest of fresh-water sponges and are 

 distributed generally over the L^nited States. Dr. Harvey 

 predicts that upwards of a dozen species will probably be 

 found in Oneida Lake when special search is made for mem- 

 bers of this group of animals. Identifications by Dr. Nathan 

 A. Harvey. 



During the field work of 191 7, a number of sponges were 

 collected incidentally from the west end of the lake which are 

 of interest, including among their number one new species. 

 These sponges were submitted to Prof. Frank Smith who 

 determined them as follows : 



Spongilla fragilis Leidy, 



Milton Point (Field No. 1627) on stones in water 1-3 

 feet deep. Outlet of Oneida Lake, near Brewerton, among 

 vegetation islands attached to Scirpus occidentalis (Field No. 

 1629) in water 5 feet deep; attached to Najas flexilis (Field 

 Nos. 1631, 1634) in water 2-3 feet deep. Willow Point, 

 Big Bay, attached to Scirpus smithii (Field No. 1630) in 

 water i foot deep ; and in outlet near Brewerton, north shore, 

 on piece of dead limb of tree near shore (Field No. 1633). 



