162 A. Alcock — Carcinological Fauna of India, [No. 3, 



Hypsophrys, Wood-Mason. 



E'ypsophrys superciliosa, Wood-Mason, Ann. Mag. Nat. Hist., March, 1891, 

 p. 269. 



Hypsophrys, Alcock, Investigator Deep Sea Brachyura, p. 12. 



Carapace deep, lonorer than broad, quadrilateral or ovate-oblong, 

 with deep vertical parallel sides, the gastric region well delimited and 

 occupying its anterior half, the linea anomurica dorsal, distinct or 

 indistinct. 



Front narrow, forming a simple or bifid rostrum which has a spine 

 on either side of its base. 



The orbits do not afford any concealment to the eyes, but form, on 

 either side of the rostrum, a broad concave facet sharply marked off 

 from the rest of the carapace by a ridge that arches round dorsally 

 from the rostrum to the antennal spine : at the upper and inner angle 

 of this facet is a well defined hollow that catches the knee of the 2nd 

 and 3rd joints of the antenuulary pedencle when fixed. The eyes are 

 well formed : the terminal joint of the eyestalk is barrel-shaped much 

 as in Homola, but the slender basal joint is short or obsolescent, so that 

 the eyes do not appreciably project beyond the edge of the orbital facet. 



The antennules and antennae are identical with those of Homola. 



The mouth-parts also are very like those of Homola, but as the 

 outer border of the merus of the external raaxillipeds is hardly at all 

 expanded these appendages are even more pediform than in Homola. 



Chelipeds slender, spiny, equal. Legs of the first three pair long, 

 with broad compressed meropodites. Fourth pair of legs short, very 

 slender, cheliform, their dactylus, which is many times shorter than 

 their propus, shutting down against and co-terminous with the slightly 

 expanded distal end of the propus. 



The abdomen of both sexes consists of seven separate segments. 



In general form Hypsophrys resembles Homola barbata, but it differs 

 from Homola in the following particulars : — 



1. The eyestalks are like those of Dromia, the long slender basal 

 joint of Homola being reduced to next to nothing. 



2. Though there are no true orbits there are distinct orbital 

 facets, and the homologies of these with the orbits of Dromia — in 

 respect both of conformation and of common use for eyes and anten- 

 nules — are unmistakeable. 



3. The external maxillipeds are unequivocally pediform, the 

 merus being hardly broader than the ischium. 



4. The fourth (last) pair of legs have the subchelse or chelge quite 

 different in form : the propodite is long and is slightly expanded at its 

 distal end, and the dactylus is a minute joint, ever so much smaller 



