PLATE IV. 



Fig. iS. Nephrops Sibogae n. sp., the largest male from Stat. 254, in which the rostrum reaches only as 

 far forward as the antennal peduncle, its distal part being regenerated and a little too short ; 

 i8« lateral view of the same specimen; 

 \Zb right antennal peduncle with scaphocerite and 

 iSc outer foot-jaw of the same male; 



\Zd lateral view of the carapace of a female without eggs, long 170 mm., from the same Station. 

 All the figures, in natural size, have been drawn by Mr. J. F. Obbes, of Apeldoorn. 



