288 Carcinological Fauna of India. 



Eumedonus zebra, n. sp. 



Carapace, in spirit, of a yellow colour, and traversed fore-and-aft 

 by five broad parallel liver-coloured bands — a median and two lateral : 

 the median and the inner lateral band on either side being continued 

 a certain distance on to the abdomen. 



The carapace is sharply pentagonal, the antero-lateral angles being 

 sharp and directed straight outwards. 



The rostrum forms a long, broad, sub -triangular lamina bifurcated 

 near the tip. 



The chelipeds in the female are about the same length as the cara- 

 pace : the ischium has a sharp tooth on its inner border, the merus has 

 one on its inner and one on its upper margin, the carpus has a very 

 strong one on its upper border, and the hand has two on its upper 

 border : the legs have the merus strongly compressed, with the upper 

 border dentate or cristate, and the dactyli are strongly recurved. 



Two ovigerous females from off Ceylon, 32 f ms : the extreme length 

 of the carapace of the larger specimen is 10 millim. 



Ceratocarcinus, Adams and White. 



Ceratocarcinus, Adams and White, Proc. Zool. Soc, p. 57, 1847 ; and ' Sama- 

 rang' Crust., p. 33. 



Ceratocarcinus, Miers, Journ. Linn. Soc, (Zool.) XIV. p. 670, 1879; and 

 1 Challenger ' Brachyura, p. 104. 



Carapace sub-hexagonal, about as broad as long, with the dorsal 

 surface nearly flat, spinose or tuberculated. The spines of the rostrum 

 are elongated, acute, and separated by a rather wide interspace, and 

 there is a well-developed lateral epibranchial spine. The orbits are 

 small and circular, and the sub-ocular lobe joins the front, so as com- 

 pletely to exclude the antennae from the orbits. The basal joint of the 

 antennae is slender and like the greater part of these appendages is 

 hidden beneath the front. The external maxillipeds are small, the 

 ischium-joint not produced at its antero-internal angle, the merus 

 distally truncated, not produced at the antero-external angle, and 

 scarcely emarginate at the antero-internal angle, where the next joint 

 articulates. The chelipeds are relatively slender and somewhat elon- 

 gated with the joints not dilated, the merus and carpus sometimes 

 armed with spines ; the dactyli acute and shorter than the palms ; the 

 ambulatory legs are slender, with the joints not dilated, the merus 

 sometimes armed with a distal spine ; the dactyli nearly straight. 



Ceratocarcinus longimanns, Ad. and Wh. 

 Ceratocarcinus longimanus, White, P. Z. S., 1847, p. 57; and Ann. Mag. Nat. 

 Hist., 1847, Vol. XX. p. 62; and ' Samarang ' Crustacea, p 34, pi. vi. fig. 6. 

 Ceratocarcinus longimanus, Miers, ' Challenger ' Brachyura, p. 105. 



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