34 



In the largest specimen, which is a female, the carapace is 30 milhm. long 

 and 2-i millim. broad, and the extended abdomen is 35 millim. long. 



2371-2373 | Off tlie Travaneore coast T 430 fathoms. 



" — Y^ Types of the species , ^at. 7° 17' 30" N. Long. 76^ 54' 30" E.J' "Investigator." 



2^. Bay of Bengal, oS W. coast of Amlanians. 238-290 fathoms. " Investigator." 

 6 



Named after the famous navigator William Baffin, who though best known 



as an explorer of Arctic Seas, was, like his brilliant contemporary John Davis, 



connected with the early history of our Indian empire. Both Davis and Baffin 



lost their lives in Indian waters, Davis being treacherously murdered by jMalay 



Pirates, Baffin being killed in action against the Portuguese at the entrance to 



the Persian Gulf. " In the Indies he dyed, in the late Ormus businesse, slaine 



in fight with a shot." 



Family Dya^omenidjh, Ortmann. 



Dynomenidie, Ortmann, in Bronn's Thier Reich, Malacostraca, p. 1155: Alcock, J. A. S. B., Vol. LXVllI., pt. 2, 



1899, p. 127. 



Dynomeniiu-e, A. Milne Edwards and E. Bonvier, Crust. Decap. Hirondelle et Princesse Alice, Monaco, 1899, 



p. 9. 



Carapace either longer than broad and convex, or broader than long and 

 flattish, the lateral borders well defined. 



Front broadly triangular, sometimes notched at tip. Antennal flagella not 

 so long as the carapace. 



External maxilhpeds typically opercular, completely closing the buccal cavern. 



Chelipeds equal or slightly unequal, generally much stouter than the legs. 



First three paii' of legs stout, about as long as the chelipeds. Fourth (last) 

 pair of legs dorsal and rudimentary. 



The abdomen in both sexes consists of 7 segments, and there is a pair of 

 lateral platelets intercalated between the last two segments. 



The (''ills are phyllobranchife but sometimes show the transition from tricho- 

 to phyllobranchia?. The branchial formula is said by A. ]\Iilne Edwards and 

 Bouvier (Crust. Decap. Hirondelle et Princesse Alice, Monaco, 1899, p. 10), to 

 be the same as that of Eomarus milcjari^. 



The sternal grooves of the female end at the level of the genital openings. 



This family contains two genera, both of Avhich are represented in the Indian 

 fauna. 



Kiy fo the genera of Dynomenid^e. 



I. Carapace flattish, broader than long, pilose ... ... ... Dtxomene. 



II. Curapace convex, longer than broad, spiiiose ... ... ... Acanthodromia. 



