274 A. Alcock — Garcinological Fauna of India. [No. 2, 



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. Doriypinae. 



*Dorippe. 



*Ethusa (*Ethusina)., 



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

 p. 27. 



Sub-family II. Tymolinse. 



Tymolus, Stimpson, Proc. Acad. Wat. Sci. Philad., 1858, 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 me to be quite possible that further investiga- 

 tion may discover Gyclodorippe to belong to Stimpson's genus 

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

 has 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 qnite another section of the Bi achynra ; 

 and I cannpt think that Cymopolia either has any right to be classed with the 

 Oxystoma. 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 Dorippidse. 



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 



