422 ANNALS NEW YORK ACADEMY OF SCIENCES 



Dr. Townsend exhibited motion pictures of the recent bio!oo:ical survey 

 work of the "Fish Hawk'' in the Long Island Sound. Dredging ap- 

 paratus and methods were illustrated. The fauna of the muddy bottom 

 in the middle of the Sound was also illustrated and described. It in- 

 cludes great numbers of spider-crabs, flounders and whelks and differs 

 from the fauna of the margins, where oyster-beds abound. 



Dr. Charles B. Davenport, director of the Carnegie Station for Ex- 

 perimental Evolution at Cold Spring Harbor, Long Island, described the 

 fauna of the brackish waters on the north shores of Long Island ; here are 

 to be found, along with fresh-water forms, a number of salt-water ani- 

 mals, such as mussels, Littorina and barnacles, which can live in brackish 

 water only when they can get purer salt water at high tide. 



Professor Raymond C. Osbum said in abstract: Nearly 800 species 

 of Bryozoa are known to inhabit the coastal shelf, down to the 100-fathom 

 line. The species fall for the most part into three groups: 1. cosmopoli- 

 tan species, or those of wide range; 2. northern species, often circumpolar, 

 which range southward along the coast, and 3. tropical species, which 

 range northward from Florida. Species of limited distribution also occur 

 here and there along the coast. 



According to orders and distribution, the species may be arranged in 

 the form of a table : 



Endo- Cyclo- Cteno- Cheilo- 

 procta stomata stomata stomata Total 



Canada and northward 3 10 1 28 42 



Canada and ranging south to Cape 



Cod 3 T 3 66 79 



Canada and rangmg south to Cape 



Hatteras 7 7 



Canada and ranging soutli to Florida. 1 4 1 12 18 



Cape Cod to Florida 1 1 5 7 



Cape Hatteras to Florida 2 2 .1 21 26 



Florida 2 5 2 70 79 



Cape Cod to Cape Hatteras 4 3 7 



Cape Cod 2 3 2 7 



Cape Hatteras 2 13 3 9 



Totals 16 23 19 216 291 



x\s the above groups are mutually exclusive, this gives a fair idea of the 

 distribution of the several orders. 



The total number of species found in each region of the coast is as 

 follows : 



Known from eastern Canada 128 



Known from eastern New England, including Cape Cod 124 



