Protozoa: Volvox and Stentor are ex- 

 tremely abundant in the lakes. 



Spongioe : Spo7igilla (?) in the stream con- 

 necting the lakes. The boring sponge, 

 Clione sulphurea Desor, is abundant. There 

 are various other species in the Harbor, 

 unidentified. 



Anthozoa: The coral Astrangia Dance is 

 one of the common products of dredging 

 at the lower end of the Harbor. Three spe- 

 cies of sea anemones are common. Among 

 them Sargartia leucolena and Halocampa pro- 

 duda are common in the sand. 



Hydrozoa : Hydra is common in the 

 lakes. Of the hydroid stocks may be men- 

 tioned Obelia, Campamdaria, Podocoryne, 

 Hydractinia, Plumularia and Bougainvillia, 

 which are abundant, and Perigonhnus, Eu- 

 dendrium and Tuhidaria, which are less 

 common. Jelly-fishes of several other 

 species occur in the tow. 



CtenophorcB : Mnemiopsis Leidyi has been 

 abundant throughout the present summer. 



Echinoderma : Asterias forbesii is very 

 abundant, especially on the outer bar. Its 

 numerous abnormalities have attracted 

 some attention this season. The sea-urchin, 

 Arbacea puncttdata Gray, is found occasion- 

 ally in dredging, but is not abundant. The 

 Holothurian Synapta Girardii is abundant 

 in the sand spit near the laboratory and is 

 sometimes found in the tow. Synapta rose- 

 ola Verrill also occurs. The tow frequently 

 contains star-fish larvae. 



Balanoglossus : A form of this genus, ap- 

 parently diiferent from B. Kowalevskii, oc- 

 curs in the sand spit. 



Mollusca : The shores of Long Island 

 have long been famous for the richness of 

 their molluscan fauna. About 100 species 



