444 PROCEEDINGS OF THE NATIONAL MUSEUM 



Table 4. — Records of J^resh-water sponge hosts of sisyrid larvae 





genera, Meyenia of the subfamil}^ Meyeninae, and Spongilla of t 

 subfamily Spongillinao (table 4). 



Brown (1952, p. 157) noted that sponges from comparative 

 cool, clean Lake Erie yielded only Climacia larvae, whereas th( 

 from the warm, shallow, polluted Haimck's Pond (on Middle B 

 Island) in Ohio yielded only Sisyra larvae. Sponges occurred 

 depths ranging from just beneath the surface to over 6 feet. Thosei 

 well-lighted places were green; those farther down were yellow: i 

 brown. Hungerford collected both Sisyra and Climacia larvae fr( i 

 Burt and Douglas Lakes in Michigan. 



Old (1933, pp. 683-684), in his observations on the Sisyridae i 

 Douglas Lake, Mich., mentions the sponges (Ephydatia fluviatH'if 

 Heteromeyenia repens, and FI. argyrosperma) on which he was unalb 

 to find a.nj sisyi-id larvae, but does not mention the species on wh:i 

 he did find them. 



Wesenberg-Lund (1939, p. 23) remarked that the number of Sisn 

 larvae living on large colonies of sponges is not great, hardly m(6 

 than 10 to 15 individuals. Berg (1948, p. 22) noted that the numlr 



