Imliaii Deep-sea Dredijimj. 4<>3 



j)ically granular, and ends internally in a lilunt-pointed 

 tooth. 



'J'he lateral niarp^ins arc arninl in iV^nt with two very strong 

 teeth, the anterior one of which, situated at tlie external 

 angle of the orbit, surmounts a remarkable inflation of the 

 wiiole intraorbital and infrahepatic region ; this inflation 

 culminates at the base of the spine in a finely granular 

 eminence, against which a strong unciform tootli situated on 

 the u])per border of the nieropodite of the cheliped can be 

 played, producing in the dead animal a siirill sound. 



The pterygostomian regions arc small, but the branchial 

 apertures are large and patulous. 



The abdomen in the male is distinctly seven-jointed. 



The eye-stalks are stout and the corneal region is reniform 

 and expanded, its major diameter being one fifth the length 

 of the carapace. 



The antennules are long and are transversely folded. 



The antennary peduncle lies within the internal orbital 

 notch, the first joint being short and slender; the antennary 

 flagellum is more than half the length of the carapace. 



The external maxillipeds have the meropodite square, the 

 succeeding joint springing from the antcro-internal angle. 



The thoracic legs are spiny. The clielipeds are subequal ; 

 the prismatic meropodite has distally on the lower edge two 

 or three spines and on the inner edge a single one, while 

 about midway along the upper edge is the large unciform 

 tooth already mentioned ; the rhomboidal carpus has two 

 spines, one at the external the other at the internal angle ; 

 the palm is large and swollen, and the fingers, which have 

 the cutting-edge strongly and unevenly toothed, are not 

 capable of complete apposition. 



The second to fifth legs are slender, compressed, and of 

 moderate length ; in all the nieropodite is distantly and 

 markedly spinate and the carpo):)odite closely and finely S})inu- 

 late along the front edge — the spination in the case of the 

 second pair only being indistinct, or even in part obsolete — 

 and the dactyli grooved and extremely slender. 



In the female the chelipeds are relatively feebler and the 

 other legs shorter than they are in the male. 



Colours rose- pink, corneal region violet. 



Several specimens of both sexes from Station 115, 188-220 

 fathoms. 



In the largest male and female the carapace is 15 millim. 

 in length and 19 millim. in breadth, the cheliped in the male 

 measuring 29 millim, and in the female 25 millim. 



