40 REPORT OF COMMISSIONER OF FISH AND FISHERIES. [334] 
Acalephs. 
Page. Page. 
Obelia commissuralis ...--.- 327 | Halecium gracile........-. 328 
O. pyriformis ....-..----+-- 390 | Sertularia argentea......-. 408 
O. diaphana ......----+---- 327 | S. pumila.........-22-- 606 327 
O. geniculata..-...-.------- 407 | Bougainvillia superciliaris. 328 
Clytia Johnstoni ......----- 408 | Margelis Carolinensis ... - - - 
Orthopyxis caliculata......- 408 | Clava leptostyla .......--- 328 
Platypyxis cylindrica....... 408 | Pennaria tiarella........-. 327 
Campanularia volubilis ..... 408 | Hybocodon prolifer.-...--. 328 
C, flexuosa ...-...----+--+ 327 | Hydractinia polyclina ..... 328 
Lafoéa calcarata ..........- 408 
Polyps. 
Page. Page. 
Metridium marginatum..... 329 | Halocampa producta ...... 330 
Sagartia leucolena ......... 329 | Astrangia Dane ......-... 329 
S. modesta.2... .23%2.0ee08 330 
PROTOZOA. 
Sponges. 
Page. Page. 
Grantia ciliata ......-.----- 330 | Tedania, sp..-..--...-.--- 330 
Leucosolenia botryoides (?).. 391 | Renieria, sp ............-- 330 
Halichoncria, sp........... 330 
Il.—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; 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 
