NO 6.] ACCOUNT OF THE SPECIES. 41 



The anterior maxillipeds (fig. 6) are comparatively small, and apparently 

 each composed of 6 joints, the 1st of which is more than twice as large as 

 all the others combined. Anteriorly, these maxillipeds exhibit 5 digitiform 

 lobes, closely crowded together, and tipped with long, coarsely ciliated, and 

 partly spiniform setae. The setae issuing from the 2 outer, extremely small 

 joints are transformed, as in the other forms belonging to this family, into very 

 delicate sensory appendages. In the present form, these appendages are 5 in 

 number, and of inconsiderable size and simple structure. 



The posterior maxillipeds (fig. 7) form each a slender, doubly geniculate 

 stem composed of 7 joints, the first 2 of which are much larger than the 

 others, and together constitute the basal part. The 1st basal joint is somewhat 

 lamellarly expanded, and carries anteriorly 6 ciliated setse. The 2nd basal joint 

 is about the same length as the 1st, but much narrower, and forms with it 

 an elbow-shaped bend. It carries posteriorly 3 ciliated sets, and at the end 

 2 similar setae placed close together. The 5 succeeding joints constitute 

 together the terminal part, which is very flexible and, as a rule, recurved. 

 It is clothed posteriorly with numerous very slender seta3, increasing in length 

 distally, the outermost almost equalling the whole maxilliped in length. 



The natatory legs are powerfully developed, though the 1st pair, as 

 usual, are considerably smaller than the 3 succeeding ones. In all of them, 

 the inner ramus is much smaller than the outer, which is 3-articulate and 

 in the 3 posterior pairs very large, with the joints lamellarly expanded. 



The 1st pair of legs (PI. VII, fig. 4) are not only much smaller than the 

 others, but also of rather different structure. The 1st basal joint does not 

 exhibit any trace of the strong plumose seta found on the inner side of 

 all the other pairs. On the other hand, inside the end of the 2nd basal joint, 

 there is a slender, flexuous seta, not found in the other pairs. The outer ramus 

 is scarcely longer than the basal part, and has the 1st joint quite simple, without 

 any spine or setae. The 2nd joint, on the other hand, has outside at the end 

 a very small spine, and inside a natatory seta. The last joint is but little 

 larger than the 2nd, and is somewhat curved outwards. It carries inside 4 

 natatory setae, and at the tip a comparatively small spine; its outer edge 

 on the other hand, is without spines, exhibiting only a fine ciliation. The 

 inner ramus is scarcely half as long as the outer, and consists of only a 



single joint, though an abrupt instriction of the outer edge seems to indicate 



6 



