88 ANIMALS OP THE SEASHORE 



Ophioderma brevispina Say (Green Brittle Star) 



PLATE VI. Fig. 6 



Usually greenish or brown, more or less mottled ; 

 the disc is completely covered with closely set 

 minute granules; each arm segment has 7 or 8 very 

 short spines on each side that lie close down on the 

 arm. Disc usually about % inch in diameter; arms 

 about 2 inches long. This brittle star lives from Buz- 

 zard 's Bay to the Greater Antilles. It is very rare 

 off New Jersey. It burrows under oyster shells and 

 other objects lying on the mud. 



Ophiopholis aculeata Linne (Daisy Brittle Star) 



PLATE VI. Fig. 3 



Usually red, brown or purple, sometimes yellow 

 or green, often mottled or spotted; surface of the 

 disc closely beset with small pointed tubercles 

 among which are a number (usually 30 to 50) of well 

 separated rounded plates; each upper arm plate is 

 encircled by a row of very small plates; the five or 

 six arm spines are broad and flattened, and project 

 directly outward from the arm. The disc is usually 

 about Vl' inch in diameter, and the arms are from 2 

 to 3 inches long. 



An arctic and subarctic species occurring south 

 to Cape Cod along the shore, and in deep water south 

 to New Jersey, where it is recorded from 38 and 89 

 fathoms. 



