19 



Arachriodromia Baffini, Alcock and Anderson, Plate II. fig. 1. 



Carapace square-cut, dorsally convex, very distinctly (from a fourth to a 

 fifth) longer than broad, its greatest breadth being just in front of the posterior 

 border, its greatest depth approximating its greatest breadth, its surface— like 

 that of the appendages and other parts of the body— tomentose. Except for 

 a few smaU sharp granules anteriorly and laterally and along the lateral border, 

 the carapace is unarmed. 



The front is deeply cleft to its base, and has the form of two acutely trian- 

 gular teeth. 



Upper margin of orbit notched near its outer angle which is dentiform, 

 the outer angle of the lower margin of the orbit is much more strongly denti- 

 form, and the (outer) orbital wall between the two spines is deficient. 



Antennal flagella longer than the carapace. 



Chelipeds rather slender, unarmed except for a few granules seen on denu- 

 dation, about If times the length of the carapace : fingers strongly hollowed ' en 

 cuillere,' especially the immovable one, which alone has teeth : wrist not elongate. 



First two pairs of legs more than twice the length of the carapace : their 

 dactyli are about two-thirds the length of the preceding joint, are stout, are 

 sharply spinate along the posterior edge, and end in a claw. The last two pairs 

 of legs are about the same length as the carapace : their small claw-like dactyli 

 shut down on a ring of spines at the end of the preceding joint. 



Colours : dirty whitish, with a bluish tinge on the carapace and a faint 

 reddish tinge elsewhere ; eyes chocolate. 



Two males and a female, from off the Travancore coast, 430 fms. : a small 

 male from the Andamans, 2-38-290 fms. 



The carapace of the largest male is 20 milhm. long and 15 millim. broad, 

 that of the female is 30 millim. long and 24 mUhm. broad. 



Named in memory of the great Arctic explorer William Baffin, who, accord- 

 ing to Sir Clements Markham, was the first Bnghshman to actually plot charts 

 in these Seas. 



Dtnomene, Latreille. 



Dynomene, Latreille, in Cnvier's Regne Animal, (nouv. ed. 1829, p. 69) : Desmarest, Consid. Gen. Crust, p. 133 : 

 Milne Edwards, Hist. Nat. Crust. II. 179 : Lamarck, Hist. Nat. Anim. Sans. Vertebr. 2nd edit. p. 482 : De Haan, 

 Faun. Japon, Crust, p. 104: Dana, D. S. Expl. Exp. Crnst. pt. I. p. 402 : A.Milne Edwards, Ann. Soi. Nat. 

 Zool. (6) VIII. 1879, Art. 3. 



Dynomene margarita, n. sp. Plate II. fig. 3, 



The whole carapace and dorsal surfaces of the chelipeds and legs are as 

 closely as possible covered with prickly spines and spinules : the under-surfaces 

 of the body and legs, eyestalks, antennge and external maxillipeds are crisply 



