obtained in t/te Indian Seas. 253 



111 the female the chelipeds are only very slightly stouter 

 than the first ambulatory legs. Tlie fingers are very indis- 

 tinctly toothed, the prehensile edges being merely rough- 

 ened ; they are not close-fitting. A small but well-marked 

 acute spine is present at the base of the free finger on its 

 dorsal aspect (present also in the male). 



The sternum of the female has seven prominent spines, 

 arranged as follows : — a spine at the base of each cheliped; 

 another at the base of each of the first pair of ambulatory 

 legs, on the margin of the concavity in which the eggs lie ; 

 a pair of spines placed transversely at the anterior edge of 

 the same cavity ; one (smaller) spine in the middle line 

 between the last pair mentioned and the anterior border of 

 the sternum. The whole space between the bases of the four 

 pairs of legs is concave and occupied by the eggs_, which are 

 small and numerous. 



The abdomen of the female is broad and carinate, except 

 the posterior two thirds of the last segment ; it consists of 

 seven distinct segments, of which the fifth and sixth are 

 broadest. The surface is very granular and sparsely covered 

 with longish hairs. A granular tubercle is present on the 

 carina of the first segment and a prominent acute spine on 

 that of the sixth segment. 'Jlie ambulatory legs diminish in 

 length and girth from first to last ; the last two pairs are 

 very slender; the last pair in this egg-laden female are 

 acutely fiexed and carried dorsaliy. 



Colour in life deep pink. 



The female and the enlarged chelipeds of the male will be 

 figured ill an carlv issue of "Illustrations of the Zoology of 

 R.I.M.S.' Investigator.' '^ 



Fam. Partheuopidae. 

 Eu.MEuoNuS; Edw. 



Eumedonus (jrunulosus, sp. n. 



Carapace depressed and sharply pentagonal. Bifurcation 

 of rostrum at tip very faint, occasionally absent, and then 

 the bilobed nature of the rostrum can only be made out by 

 the median longitudinal dorsal groove. The rostrum is 

 transversely narrower and thicker (dorso-ventrally) than in 

 E. zebra, where it is a broad thin lamina deeply bifid at the 

 tip. There are no coloured band-markings on the carapace. 

 The surface of the body generally, including chelipeds and 

 legs, is coarsely but evenly and regularly granular. The 

 regions of the carapace are well defined. 



