70 



of the upper liorder of the merus of all four pairs is a notch and spiniform 

 tooth. 



The last pair of legs is not much longer than the chelipeds, and has the 

 carpus shortened and broadened and the next two joints paddle-like — the edges 

 of all these three joints being elegantly plumed. 



Two females from the Andaman Sea, one from 405, the other from 185 

 fathoms. 



The larger specimen, which is laden with tiny eggs, has a carapace 48 millim. 

 long and 51 millim. broad. 



Colours in life, recorded by Dr. A. R. Anderson : carapace very pale orange 

 above, the anterior edge and first two teeth of lateral margin white ; merus 

 joints pale orange above, the colour extending onto the carpus, the rest of the 

 legs chalky white ; eyes bluish-grey : eggs brick red. 



CATOMETOPA. 

 Family Ocypodlclce. 



Subfamily CarcmopJacinse. 

 Carcinoplax, Edw. 



Cnrtonotus, DeHaan, Fann. Japon. Crust, p. 20. 



Carcinoplax, H. Milne Edwards, Ann. Sci. Nat. Zool. (3) XVIII. 1852, p. 164.. 



Carapace subquadrilateral, transverse, convex fore and aft and strongly de- 

 clivous anteriorly, nearly flat from side to side, often tomentose, the regions not 

 very well defined. 



Front broadish — a third to a fourth the greatest breadth of the carapace in 

 extent — straight and square-cut, generally projecting beyond the orbits. 



Antero-lateral borders much shorter than the postero-lateral, commonly 

 armed with 2 or 3 teeth (including the orbital angle) : postero-lateral borders 

 subparallel. 



Orbits of good size, usually vnth a low entire margin. The antennules fold 

 quite transversely, beneath the front. The antennal flagella are long, some- 

 times half the length of the carapace, or more : the basal antenna-joint, which 

 lies in the orbital hiatus, does not nearly reach to the front. 



The palate is sharply marked off from the transverse rather narrow epistome, 

 and the efferent branchial channels are well defined. The external maxillipeds 

 completely close the buccal cavern : the merus is broad, with its antero-external 

 angle a little expanded, and gives attachment to the palp at its antero-intemal 



angle. 



The chelipeds are equal in length, but one hand may be a little stouter than 

 the other : the wrists are broad and have their inner angle strongly pronounced. 



