J88 Carcinolo gieal Fauna of India. 



Tlie trunk-legs recall those of Egeria, being all long, slender, cylin- 

 drical, and quite devoid of hairs or spines: the chelipeds are short, and 

 are not stouter than the ambulatory legs. 



For proportions, see Ann. Mag. Nat. Hist., March, 1891, p. 260. 



Apocremnus, A. Milne-Edwards. 



Apocremnus, A. Milne-Edwards, Miss. Sci. Mex., etc., Crust., etc., I. p. 184. 

 Apocremnus, Miers, ' Challenger' Brachyura, p. 17. 



Carapace triangular or pyriform, much narrowed in front, inflated 

 behind. Rostrum bifid. Eyes imperfectly retractile : a strong supra- 

 ocular, but no post-ocular spine [a distant hepatic spine must not be 

 mistaken for a post-ocular spine]. Basal antennal joint narrow, its 

 antero-external angle forming a strong spine visible from above on 

 either side of the rostrum : the free joints of the peduncle and the fla- 

 gellum exposed to dorsal view. Epistome broad. External maxillipeds 

 with the merus at least as broad as the ischium, quite closing the mouth- 

 frame. Chelipeds not much enlarged : the other legs short and slender, 

 with slender dactyli capable of some flexion on the penultimate joint. 

 Abdomen in the male six jointed — (in the female four (?) jointed). 



The genus Apocremnus has never yet been reported from Eastern 

 Seas. It was first described from the Florida coast, and was afterwards 

 reported by the ' Challenger ' from Fernando Noronha (an island in the 

 South Atlantic, off the coast of Brazil). There is nothing unprecedent- 

 ed therefore in its occurrence in deepish water in the Indian Ocean. 



Apocremnus indicus, n. sp. Plate IV. figs. 2, 2a. 



Carapace pyriform, inflated in the branchial, constricted in the post- 

 ocular region, and armed with six long knob-headed spines, as follows : — 

 one, semi-erect, above the root of either eye-stalk ; one in the middle of 

 the cardiac region, flanked on either side by one in the middle of each 

 branchial region ; one in the middle line on the posterior border. There 

 are, in addition, on either side, two sharp spines, one above the other, 

 near the middle of the hepatic region, and far from the eye. 



The rostrum is formed of two short, slightly divergent, knob-head- 

 ed spines. On either side of its base are seen the antennas and a large 

 spine formed by the antero-external angle of the basal antennal joint. 



The constituent segments of the sternum are sharply granular, and 

 are separated from one another by deep grooves. 



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