on the Coast of New England. 133 
Radiata. 
The most common shore species were: 
Strongylocentrotus Dré- \Campanularia flexuosa. Sertularella rugosa. 
bachiensis. Sertularia pumila. Clava leptostyla. 
Asterias vulgaris. Metridium marginatum. 
Obelia geniculata. 
Several species of sponges are also common between tides. 
On the sheltered muddy bottoms, from just below low-water 
mark, to the depth of about two fathoms, the eel-grass, Zostera 
marina, grows in abundance. Among this many species of 
crustacea, worms, and mollusks find congenial abodes, and fur- 
nish abundant food for the fishes that frequent such localities, 
Some of these are somewhat southern in character. 
Among the Crustacea from the eel-grass were: Hippolyte 
j mith; J. 
(Zs 
Americana Smith; Calliopius leviusculus ; a new genus with 
‘very large epimera, allied to Metopa; a new species of Munna, 
a genus of isopod crustacea, new to the American coast; /dotea 
trrorata, etc. 
From the piles of the wharves at Portland a great variety of 
dectdn bryozoa, etc., were obtained; the slender 
mong the more interesting littoral species obtained on the 
‘ttorina littorea and 
the Cancer borealis. The latter is a large crab which has 
bridge, by D Palmer, It has been s eral 
Writers that this shell has been recently and accidentally intro- 
uced f urope: but Dr. Dawson informs me that he col- 
