Carcinological Fauna of India. 231 



Of 24 specimens from different parts of India there is not one of 

 great size, nor a single adult female. 



I believe that this species is only the young form of Doclea hybrida. 



Doclea hybrida (Fabr.), Edw. 



Inachus hybridus, Fabricius, Supplement, p. 355. 

 [Haia hybrida, Bosc, I. 256] ; and Latreille, Hist. Nat. Crust., VI. 99. 

 Doclea hybrida, Milne-Edwards, Hist. Nat. Crust, I. 294. 

 Doclea hybrida, Adams and White, ' Samarang ' Crustacea, p. 7. 

 Doclea hybrida, Bleeker, Rechei*ches Crust. Tnd. Archipel., p. 9. 

 Doclea hybrida, De Man, Mergui Crust., Journ Linn. Soc., Zool., XXII. 1888, 

 p. 9. 



Doclea hybrida, Henderson, Trans. Linn. Soc, Zool. (2) V. 1893, p. 342. 

 ? Doclea hybridoidea, Bleeker, Recherch.es Crust. Ind. Archipel., p. 8. 



This species differs from Doclea muricata, only in the following 

 characters, which, I think, are merely due to age : — 



(1) it is much larger ; 



(2) the spine of the antero-lateral series is (except in small females) 

 the smallest, and tubercles are found instead of spines on the dorsal 

 surface of the carapace, the tubercles corresponding in number and 

 position with the spines of D. muricata ; 



(3) the chelipeds in the adult male are nearly as long as the 

 carapace and rostrum, and have the hands enlarged. 



As in D. muricata the female abdomen consists of four segments. 



As Fabricius, loc. cit., says of this species compared with D. muricata, 

 vix distinctus videtur. 



We have 29 good specimens from different parts of India, all 

 being large males and egg-laden females. I think that they can only 

 be the adult stage of Doclea muricata. 



Doclea tetraptera, A. O. Walker. 



Doclea tetraptera, A. 0. Walker, Journ. Linn. Soc, Zool., Vol. XX. 1890, p. 114 

 pi. vi. figs. 4-8. 



Body and legs, except the hands and dactyli, covered with a dense 

 stiff fur, so stiff on the trunk- legs as to give their joints, though cylin- 

 drical, a sharply quadrangular or triangular sectional form. 



The circular form of the carapace is a good deal obscured by the 

 unusual development of the rostrum and of the lateral-epibranchial 

 and postero-median spines. 



The rostrum is from one-fourth to two-fifths the length of the 

 carapace proper, and ends in two widely divaricated spinules. 



In addition to the tooth formed by the basal antennal joint, and 

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