274 Carcinological Fauna of India. 



The following is a list of known genera, Indian genera being printed 

 in Roman type and genera known to me by autopsy being marked with 

 an asterisk, ' 



Family Dorippidse. 



Sub-family I. Dori^jpinse. 



*Dorippe. 



*Ethusa (*Ethusina). 



? Cymopolus, A. Milne Edwards, Bull. Mus. Comp. Zool. VIII. 1880, 

 p. 27. 



Sub-family II. Tymolinse. 



Tymohis, Stimpson, Proc. Acad. Na£. Sci. Philad., 3858, p. 163. 



Cyclodorippe, A. Milne Edwards, Bull. Mus. Comp. Zool. VIII. 

 1880, p. 24. 



Cymonomus, A. Milne Edwards, Bull. Mus. Comp. Zool. VIII. 

 1880, p. 26. 



*Cymonomops. 



Uncertain in position. 



Corycodus, A. Milne Edwards, Bull. Mus. Comp. Zool. VIII. 1880, 

 p. 23. 



It appears to nie to be quite possible that further investiga- 

 tion may discover Oyclodorippe to belong to Stimpson's genus 

 Tymolus. Ortmann, (Zool. Jahrbucher, Syst. VI. 1892, p. 559) 

 Las already suspected the identity of these two genera. 



Caphyra, Guerin, which was included with the Dorippidse by Milne Edwards, 

 has by other authors been shown to belong to quite another section of the Brachynra ; 

 and I cannot think that Cymopolia either has any right to be classed with the 

 Oxysioma. Previous authors also, such as Dana (U. S. Expl. Exped. Crust, pt. I. 

 p. 403) and Miers (' Challenger ' Brachyura p. 334) have suggested the advisability 

 of removing Cymopolia from this group. 



Key to the Indian Genera of Dorippidaa. 



I. The external maxillipeds leave all the anterior 

 part of the buccal cavern uncovered : — 



1. The anterior extremity of the buccal 



cavern passes between the antennules 



to or even beyond the tip of the front : 



the afferent branchial apertures are 



279 



