MYSIS VULGARIS. 



STOMOPODA. 



339 

 MYSIDJE. 



My sis vulgar is. 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. ED\V, 



Hist, des Crust. III. p. 459. 



GENERAL form less robust than in M. chamaleon. 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 

 antennae much resembling that in the former species ; scale 

 of the external antennae 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 



z 2 



