STOMOPODA. 



-MYSIS VULCrAEIS. 



330 

 M YSIDM. 



Blysis vulgaris. J. V, Thompson. 



Specific Character. — Middle plate of the tail lanceolate, the apex entire ; rostrum 

 very short, obtusely triangular, extending to about half the length of the ocular 

 peduncle ; antennal scale nearly as long as the carapace. 



Mysis vulgaris, J.V.Thompson, Zool. Researches, p. 30, t. i. — Edw. 



Hist, des Crust. III. p. 459. 



General form less robust than in M. chamoileon. The 

 carapace slender, somewhat cylindrical, slightly constricted 

 at its anterior third, terminating in a very short, obtusely 

 triangular rostrum, which scarcely extends to the middle 

 of the ocular peduncle. The peduncle of the internal 

 antennee much resembling that in the former species ; scale 

 of the external antenna not less than four times the length 

 of the peduncle of the internal ; subulate, obtuse at the 

 points, ciliated on both sides, and without an apical tooth. 

 Middle plate of the tail lanceolate, acute, spinulose on the 



