CRtJSTACEA. OF THE MEEGTJl AUCHIPELAGtO. 6f 



■with longer hairs, namely — one on the front between the orbits, 

 parallel with the frontal margin, and one on each side of the 

 carapace, starting from the last antero-lateral tooth, separating 

 the antero-lateral portion of the cephalothorax from the postero- 

 lateral, but not reaching as far as the gastric region. 



The front is a little broader than a third of the distance between 

 the last antero-lateral teeth, the proportion of that distance to the 

 breadth being as 23 to 9 ; it is somewhat declivous and divided by 

 a small median triangular notch into two rather prominent and 

 slightly oblique lobes, with a nearly straight or slightly emar- 

 ginate anterior margin. The frontal lobes are not continuous 

 with the orbital margin, but separated laterally from the internal 

 orbital angles by a small angular cleft. The orbital margins, 

 both the superior and the inferior, are entire and not denticulate ; 

 the upper margin presenting moreover no incision, this species 

 belongs to the subgenus Parapilumnus, Kossmann. 



The external orbital angle is not at all prominent and the 

 antero-lateral margins of the cephalothorax, which are a little 

 shorter than the postero-lateral, are armed with three small 

 spiniform teeth behind the angle of the orbits, the last being a 

 little smaller than the two anterior ones. 



The pterygostomian regions are perfectly smooth and there is 

 no trace of a subhepatic spine. As regards the male abdomen, 

 I will only remark that the penultimate joint is a little broader 

 than long. 



The anterior legs or chelipedes are of unequal size, and in 

 both the specimens the right is the larger. The larger chelipede 

 is everywhere smooth and glabrous, and does not present even a 

 trace of granulation, but appears polished and shining. The 

 arm is very short, scarcely extending beyond the lateral margins 

 of the carapace ; its anterior margin is armed with two or three 

 small acute teeth. The wrist has a polished convex upper surface, 

 and is armed at its internal angle with a short though acute 

 tooth. The hand is very large, like the wrist, and nearly as 

 long as the breadth of the cephalothorax ; its surface is every- 

 where smooth, convex, polished, and glabrous. The fingers are 

 also smooth, not sulcate, and their pointed tips cross one 

 another. 



The smaller chelipede resembles the larger, but the wrist and 

 the hand are a little hairy and the mobile finger is slightly sul- 

 cate longitudinally. 



5* 



