Indian Deej-t-aea Dredging. 325 



as a large spine on tlie posterior margin of the carapace. ( )ii 

 either side of this rostral series of spines the orbital spine 

 also is continued backwards as a gently divergent series of 

 rather smaller spines, so that the carapace is dorsally tra- 

 versed by three sharply spinate carinas. The anterior 

 margin on either side of the rostrum is concave, without any 

 obliquity ; the posterior margin is raised and closely spinate 

 throughout; on the lateral margins the spinatuie is hardly to 

 be distinguished from the general spinature of the surface, 

 the antero-lateral spine alone being large. 



Abdominal terga with the transverse and concentric ridges 

 well developed ; the tiist tergum is remarkably broadly 

 exposed and has the entire surface sharply rugose ; the 

 second and third have their anterior edge and their principal 

 transverse ridge si)inate, two of the spines in every case, 

 namely those on either side of the middle line, being large ; 

 the fourth has the anterior edge only armed in an exactly 

 similar manner. 



The eyes are large — the major diameter one fourth the 

 length of the carapace — and much compressed ; the corneal 

 region is remarkably narrow and the setaj that fringe its basal 

 margin overlap the eye in front ; in addition to these setae 

 there are three half-rings of setae on the eye-stalks. 



The basal joint of the antennal peduncle has its antcro- 

 internal angle produced into a great serrated hairy spine 

 about half as long as the carapace, the spines of the two sides 

 converging in front of the eyes ; the antennal flagellum is not 

 much more than two thirds the length of the body with the 

 rostrum. 



The external maxillipeds are very hairy, and the merus 

 has a strong spine on the inner edge near the proximal end. 



The chelipeds (in the female) are one half longer than the 

 body with the rostrum, are slender and cylindrical, and are 

 remarkable for the great length of the carpus, which is equal 

 in length to the palm of the propodite or more than two thirds 

 the length of the meropodite ; all the joints are sharply 

 squamous, the scales on the meropodite, and to a less extent 

 on the carpus (except on the under surface of these joints), 

 forming spines ; the fingers are rather more than two thirds 

 the length of the palm, the opposed edges are tineiy and 

 closely serrated, the immobile finger having also a second 

 series of distant large teeth and ending in a pair of claws 

 between which the tip of the dactylus closes. 



The second, third, and fourth legs have the merus and 

 carpus strongly spinate along both edges, the propus finely 



