44 IOWA STUDIES IN NATURAL HISTORY 



Homalophiura abyssorum Ophiozonella clypeata 



Homalophiura inornata "^Ophiozonella marmorea 



*Ophiomnsium acuferum *Ophiozonella nivea 



OpJiiomusium armigerum Ophiozonella nivea compta 



*Ophiomusium ehurneum ^Ophiozonella tessellata 



Ophiomusiiim lymani Ophiomidas duhius 



*Ophiomusium monoplax Ophiolepis elegans 



Ophiomusiiim oligoplacum *Ophiolepis paiicispinu' 



Family Ophioleucidae 



Ophioleuce depressa Ophiopyren longispinus 



*Ophiop(Epale goesiana *Ophiermis adspersus 



The following names are based upon color varieties: 



Amphiura vivipara var. anmd^ta H. L. Clark 

 Ophiothrix oerstedii var. lutea H. L. Clark 

 Ophiothrix angulata var. atrolineata H. L. Clark 

 Ophiothrix angidata var. vi-olacea Miiller and Trosehel 

 Ophiothrix angidata var. phoinissa H. L. Clark 

 Ophiothrix angulata var. phlogina H. L. Clark 

 Ophiothrix angulata var. poecil-a H. L. Clark 



THE OCCURRENCE OF OPHIURANS AT BARBADOS 

 AND AT ANTIGUA 



In his account of the natural history of Barbados published in 

 1750 the Reverend Griffith Hughes wrote under the heading 

 "The Sea Scorpion," "What we call here the Scorpion is by 

 Petiver called Stella marina Scolopendroides. Its five rays 

 might perhaps properly cause it to be called the Stella manna/ ^ 

 This is the only ophiuran mentioned by Hughes. 



The Sea Scorpion, Ophiocoma echinata, still called by the same 

 name, I found to be abundant in 1903, and Professor Nutting 

 states that it occurs almost literally under every stone and scut- 

 tles away with amazing celerity when disturbed. It was the 

 most abundant and conspicuous form of animal life under the 

 loose coral rocks uncovered at low tide on both sides of the labor- 

 atory at Pelican Island. It is most commonly brown in color, 

 with the club shaped spines almost black. The disk shows great 

 variation, often having a central oval or pentagonal area of 



