476 STALK-EYED CRUSTACEA 



and about twelve scattered spines ; below there are nine. 

 — (A . debilis^ 



I. Acanthephyra ensis. 



Acanthephyra ensis , A. Milne Edwards. 



The rostrum is long, thin, and sharply turned upwards 

 towards its posterior third ; it has four small spines above 

 near its base ; its inferior border is cut into more than 

 forty-five small serrated denticulations. The abdomen is 

 rounded above ; its third segment alone ca'rries behind a 

 small median point. 



Range. — Barbados, Bahamas. 



2. Acanthephyra armata. 



AcayithepJiyra armata . A. Milne Edwards. 



The rostrum is thin, long, and much curved upwards ; 

 it springs from the carapace from a slightly projecting 

 keel. Its superior border has above the eyes five small 

 spines; it is smooth in the rest of its extent. Its lower 

 border has only one spine at a level with the antennal 

 basal scale, giving the rostrum a forked appearance. The 

 superior flagellum of internal antenna; is broad at its 

 base, and has below a kind of down. The abdomen is 

 large. The second, third, fourth, fifth, and sixth segments 

 have, except the second, a postero-median point ; the 

 sixth has, at its extremity, three or five small spines. 



Range. — St. Lucia, Sea of Banda. 



3. Acanthephyra debilis. 



AcanthepJiyra debilis . . A. Milne Edwards. 

 SystcUaspis debilis . . . Spence Bate. 



The rostrum is almost twice as long as the antennal 

 basal scale ; it is slightly curved upwards ; the superior 



