1899.] A. Alcock — Carcino logical Fauna of India. 101 



one below, and one at the inner angle ; lower wall formed chiefly by the 

 carapace. Anterior margin of buccal cavity not distinctly defined, 

 epistome short, ridges of the endostome developed. Sternum long and 

 ' rather narrow. Abdomen of male narrow and five-jointed, the third, 

 fourth, and fifth segments consolidated. Eye-stalks very small, retrac- 

 tile within the orbits. Antennules longitudinally folded. The antennae 

 lie in the inner hiatus of the orbit ; their basal segment is but slightly 

 enlarged, not filling the hiatus at the inner angle of the orbit nor 

 attaining to the front, subcylindrical, unarmed, imperfectly fused with 

 the carapace ; the second segment is longer and slenderer than the first, 

 the third segment about equal to the second in length, but slenderer ; 

 all these segments are furnished with long and coarse setse ; the whole 

 antenna is less than one-half as long as the carapace. The ischium of 

 the outer maxillipeds is produced at its antero-internal angle ; the 

 merus of the same appendages is rounded at the antero-external angle, 

 obliquely truncated bnt not emarginated at the antero-internal angle, 

 where it articulates with the following segment. Legs of moderate 

 length. Right and left chelipeds very unequally developed in the male. 

 Dactyli of ambulatory legs styliform, straight slender, longer than the 

 penultimate segments." 



4. Trachycarcinus glaucus, Alcock and Anderson, 



Trachycarcinus glaucus, Alcock and Anderson, Ann. Mag. Nat. Hist. Jan. 1899, 

 p. 8 : Alcock, Investigator Deep Sea Brachyura, p. 59, pi. ii. fig. 2. 



Carapace irregularly pentagonal, its surface coated with short stiff 

 club-shaped hairs ; the regions well defined, rather tumid, much sub- 

 divided into tumid lobules, of which the convexities are capped by 

 clusters of large conical granules and the general surface also is studded 

 especially in the young with similar granules. 



Front narrow, horizontal, prominent, deeply cleft into three prongs 

 of nearly equal size. 



Antero-lateral borders half as long again as the postero- lateral, 

 armed with three stout pinnulate spines not including the outer orbital 

 angle : postero-lateral borders entire, posterior border finely beaded. 



Upper orbital wall deeply cleft into three pinnulate teeth, lower 

 orbital border deeply concave, its inner angle strongly spiuiform. 

 Eye-stalks slender, rather long : the eyes, which are more ventral than 

 terminal, are dull and faintly pigmented ( as in many species of Muni- 

 dopsis), and are non -facetted. 



Antennal flagella short, extremely slender, not hairy. 



Chelipeds remarkably unequal in the male, equal in the female. 



The smaller cheliped of the male and both chelipeds of the female 



