176 A. Alcock— Garcinological Fauna of India. [No. 1, 



Tn tlie Indian Museum are 5 specimens, from Palk Straits, 5-7 fms., 

 and off Little Andaman 12 fms. 



100. Gymo tuberculatus, Ortmann. 

 Cymo tuber culatus, Ortmann, Zool. Jahrb. Syst. VII. 1893-94, p. 443. 

 This species, from the Maldive Islands, resembles G. quadrilobatus 

 in the characteristic sculpture of the chelipeds, and may perhaps be 

 identical with Miers' species. 



It is not represented in the Indian Museum. 



Section II. Hyperomerista. 



The efferent branchial channels are defined by a ridge on either 

 side of the palate, the ridges extending right up to the epistomial 

 edge. 



Sub-family IV. Menippinj:. 



Carapace broad, transversely oval ; front a fourth, or less tlmn a 

 fourth the greatest breadth of the carapace. The basal antennal joint 

 does not nearly reach the front. The abdomen of the male has all 7 

 segments distinct and separate. 



Alliance I. Menippioida. Carapace convex, its anterolateral 

 borders longer than the postero-lateral : ridges of the endostome 

 faint. 



Alliance II. Pseudozioida. Carapace flat, its antero-lateral borders 

 shorter than the postero-lateral : ridges of the endostome strong and 

 sharp. 



Sub-family V. Oziin^e. 



Carapace broad, transversely oval ; front broad, about a third the 

 greatest breadth of the carapace. The basal antennal joint is broadly 

 in contact with the front. All 7 segments of male abdomen distinct 

 aud separate. The efferent branchial channels very distinct and cir- 

 cumscribed. 



Alliance I. OztoiDA. The orbital hiatus is open and is occupied 

 by the antennary flagellum. 



Alliance II. Ruppellioida. The orbit is a completely closed 

 cavity. 



Sub-family VI. Pilumnin^;. 



Carapace moderately broad ; front about a third the greatest 

 breadth of the carapace : the antero-lateral borders of the carapace 



