i8 Records of the Indian Museum. [Vol. XVI, 1918.] 



I give below an identification table by means of which the 

 various species of the genus Acartiella can be distinguished from 

 each other : — 



I. ^ and $. {a) 4th and 5th thoracic segments 



separate ... . . ... A. gyavelyi. 



(b) 4th and 5th thoracic segments 



fused ... ... ... vide II. 



II. ^ and 5' (^) 2nd antenna normal; Acartia- 



Hke. ... ... ...A. kempt. 



(b) 2nd antenna having the flattened 



form tvpical of the genus .. vide III. 



III. A. $ . (a) 5th leg: endopod | length of exo- 



pod and both serrated ... ... A. tortanifoymis. 



(b) 5th leg : endopod short, ^ length 

 of exopod : — 



(i) Exopod serrated on inner 



margin ... . . A. major. 



(2) Exopod unarmed on inner 

 margin ... ... A. miiioy. 



II' B. (^. (a) Basal of right leg produced in a 



single process. 



(i) A short triangular plate ... A. mi>ioy. 

 (2) A long narrow process ... A. toj'taniformis. 

 (b) Basal of right leg produced in two 

 processes, one rounded and the other 

 triangular .. .. ... A. major. 



REFERENCEvS TO LITERATURE. 



Sewell, 1912. — " Notes on the Surface-living Copepoda of the 

 Bay of Bengal, I and II." Records of 

 the Indian Museum, Vol. VII, Part IV, 

 No. 29. 



Sewell, 1914. — " Notes on the Surface Copepoda of the Gulf of 

 Mannar." Spolia Zeylanica^ Vol. IX, Part 

 XXXV. 



