8 Major A. Alcock and Capt. A. R. S. Anderson on 



than in front, deep, inflated, tomentose, unarmed except for a 

 few sharp granules anteriorly and laterally ; two creases 

 break either lateral border, the posterior one being continued 

 to the cardiac region as the cervical groove. 



Front prominent, horizontal, bifid from its base. 



Antennule and eye retractile into an orbit almost like that 

 of Dromia. Eye-stalks long and slender, not completely 

 filling their part of the orbit; eyes small, but well-formed 

 and well-pigmented. Antennal flagella longer than the 

 carapace. 



Palate well delimited from the epistome ; the ridges 

 defining the expiratory canals very distinct ; external maxilli- 

 peds distinctly opercular, but with a pediform cast. 



Chelipeds equal, slender, though considerably stouter than 

 the legs, about If times the length of the carapace, unarmed 

 except for a few sharpish granules, visible only when the 

 dense tomentum is removed; the fingers well calcified, 

 hollowed en cuillh-e, the tip of the dactylus fitting into a 

 notch in the tip of the thumb. 



Legs cylindrical, smooth beneath a thick tomentum. The 

 first two pair are more than twice the length of the carapace; 

 their dactyli are stout, are about § the length of the preceding 

 joint, and are sharply spinate along the posterior edge up to a 

 terminal claw. The last two pair are about the same length 

 as the carapace, are subdorsal in position, and end in a small 

 claw-like dactylus that shuts down on a circlet of spines at 

 the end of the preceding joint. 



The sternal grooves of the female end, without tubercles, 

 at the level of the openings of the oviducts. 



The abdomen of both sexes consists of seven separate 

 segments ; the pleurse of the third to the sixth somites are 

 remarkably large and independent, and the last abdominal 

 tergum is nearly as long as the preceding five combined. 



Two males and a female from off the Travancore coast, 

 430 fathoms. 



This species at first sight might be taken for the Uomolo- 

 dromia yaradoxa of A. Milne-Edwards, in which, however, 

 it is stated that there are no orbits and that the antennules are 

 not retractile. 



Family Corystidae. 

 Teachtcaecinus, Faxon. 

 Trachycarcinus glaucus, sp. n. 

 Carapace irregularly pentagonal, its surface coated with 



