130 ' CLARK. 



DESCRIPTIVE LIST OF BERMUDAN ECHINODERMA. 

 ASTEROIDEA. STARFISHES. 



1. Luidia clathrata (Say). 



Large flat starfishes with five arms (about five inches long), 

 Hving on sandy bottoms or underneath the sand. Usually 

 bluish-gray above and light beneath, but the only specimen re- 

 corded from Bermuda is said to have been " salmon-pink " when 

 alive; Not at all common. 



2. Asterina folium (Ltk.). 



Small pentagonal starfish, less than an inch across, found on 

 the underside of pieces of rock. Color varies considerably, us- 

 ually light, often blue. Not very common. 



3. Linckia guilding-ii (Gray). 



Medium sized reddish- or yellowish-brown starfish with five 

 or six rather slender, smooth, cylindrical or slightly flattened 

 arms, from one to eight inches long. Found about the reefs but 

 apparently quite rare. 



4. Asterias tenuispina Lamk. 



This starfish usually has six or seven arms, but the number 

 varies from five to nine. They are nearly cylindrical, only 

 slightly flattened, and very spiny. Color yellow or more or 

 less orange with dark markings. Quite common. 



OPHIUROIDEA. BRITTLE STARS. 



1. Ophiura appressa Say. 



Disc finely granular; arm spines 8-9 very small ; arms cyl- 

 indrical. Color brownish-gray, variegated with green, red and 

 white ; arms banded with darker. Rather common, under 

 rocks along sandy beaches. 



2. Ophiactis mulleri Ltk. 



Disc closely covered with radial shields and overlapping 

 scales, the latter usually bearing small spines. Arms stout, 

 somewhat flattened, bearing stout, smooth spines. Very small ; 

 Ffreen -and white. Rare. 



