1922.] 



W. M. Tattersaix : Indian Mysidacea. 



501 



Third thoracic limb less robustly built than in the other two 

 species, merus nearly four times as long as broad without distal 

 process, carpus shorter than the merus, three times as long as broad, 

 the inner margin armed distally with three rather stout simple 

 spines, penultimate joint short without inner process, nail strongly 

 curved, about one third of the length of the carpus. 



R(maining thoracic limbs slender with the tarsus composed 



Text-fig. 28. — Heteromysis gymnura, sp. nov. 



a, eye, X 50; b, antennal scale, X 65 ; c. endopod of third thoracic limb, 

 X 65 ; d, endopod of fourth thoracic limb, X 65 ; e, telson, X 65. 



of three joints terminated by a distinct nail, merus almost equal 

 to the tarsus and nail together, ischium one and a half times as 

 long as the merus. 



Telson slightly longer than the last abdominal somite, one and 

 three quarter times as long as broad at the base, cleft for more 

 than one third of its length, the margins of the cleft armed through- 

 out with about 25 closely set teeth, apex one quarter of the base of 



