332 



Records of the Indian Museum. 



[Vol. XVI, 



All well-grown males can be referred without the least hesita- 

 tion to one or other dimorphic form ; the " high " males reach a 

 larger size, the carapace being sometimes as much as 5"5 mm. in 

 length, whereas the ' low " males rarely exceed 45 mm. In speci- 

 mens of medium size the characters of the sternum and cheln are less 

 well developed, though as a rule perceptible, but in very small in- 

 dividuals, from 2"0 to 3'0 mm. in length, it is usually not possible 

 to detect them. The form of the copulatory appendage appears, 



Text-fig. 10. — Dofilla intermedia, tie Man. 

 a. Chela of " high " male. d. Copulatory appendage of "high" 



h. Chela of " low " male. male. 



c. Copulatory appendage of "low" e. Abdominal sternum of "high" 



male. male. 



/. Abdominal sternum of " low " male. 



however to be quite constant ; I have examined it in all the speci- 

 mens and have never once been in doubt. 



At Chandipur Dr. Gravely collected specimens on three occa- 

 sions, the numbers being as follows : — 



" Hi^-h" males. " l.ow" males. b\Mnales. 



June, 1915. ' 17 ^ 15 (I ovig.) 



May. 1916. 46 18 -39(1/ ov'g.) 



May, 191 7. 41 20 33 (3 ovig.) 



104 



44 



87 



