334 'REPORT OF COMMISSIONER OF FISH AND FISHERIES. 



Acalephs. 



Page. 



Obelia comniissuralis 327 



O. pyriformis 390 



O. diaphana 327 



O. geniculata 407 



Clytia Johnstoni 408 



Orthopyxis caliculata 408 



Platypyxis cylindrica 408 



Caropanularia volubilis 408 



C. flexuosa ,. 327 



Lafoea calcarata 408 



Page. 



Halecium gracile 328 



Sertularia argentea .* 408 



S. punrila. 327 



Bougainvillia superciliaris . 328 



Margelis Carolinensis 



Clava leptostyla 328 



Pennaria tiarella 327 



Hybocodon prolifer 328 



Hydractinia polyclina ..'... 328 



Polyps. 



Page. 



Metridiuin marginatum 329 



Sagartia leucolena 329 



S. modesta 330 



Halocampa producta 

 Astrangia Danse 



Page. 

 330 

 329 



PROTOZOA. 



Sponges. 



Page. 



Grantia ciliata 330 



Leucosolenia botryoides (?) . . 391 

 Halichondria, sp 330 



Page, 



Tedania, sp 330 



Renieria, sp 330 



II. — 2. FAUNA OF THE SANDY SHORES OF THE BAYS AND SOUNDS. 



These sandy shores vary considerably in character according to their 

 situations and composition. In the more exposed positions the beaches 

 of fine loose sand differ but little in character from those that prevail 

 so extensively on the ocean shores, from Cape Cod to North Florida. 

 In more sheltered situations there is generally more or less mud mixed 

 with the sand, which often forms shores with a very gentle slope, run- 

 ning down to broad flats, bare at low- water ; such flats of sandy mud 

 are the favorite homes of large numbers of burrowing creatures j but 

 even on the exposed beaches of loose siliceous sand, which are completely 

 torn up and remodeled by every storm, there are still to be found many 

 kinds of animals perfectly adapted to such conditions, finding there 

 their proper homes. In other cases there is more or less gravel and 

 pebbles mixed with the sand, which, under some conditions of expos- 

 ure, produce a firm and compact deposit, admirably adapted to the 

 tastes and habits of certain tube-dwelling and burrowing creatures. In 

 other places, especially in sandy coves or other sheltered situations, the 

 sandy flats are partly covered by tufts and patches of eel-grass, and 



