40 



Gr. 0. SARS. 



[No. 8. 



of the Ist pair. The inner corner, too, is produced as a well- 

 marked triangular maxillary process, provided on the inner side 

 with a row of 7 strong falciform setæ, curving inward, the tip 

 itself exhibiting 2 small denticles and a single recurved seta. 

 The epipod is perfectly similar in form and structure to that on 

 the Ist pair. 



The 3rd pair of legs (£g. 4) have the endopodal portion 

 much reduced in size, and furnished with about 7 plumous setæ; 

 it juts forth inward, as a well-marked maxillary process, of a 

 similar structure to that of the 2nd pair, save that 4 strong 

 curved denticles are affixed on the outer margin, in place of 

 the delicate cilia occurring there on the 2nd pair. The exopod 

 constitutes a thin membranous plate, tapering somewhat toward 

 the end, and furnished with 4 strong plumous setæ, two of which 

 proceed from the somewhat expanded outer margin, whereas the 

 other 2 are affixed to the apex; one of the latter is exceedingly 

 long, and indistinctly bi-articulate. The epipod has the same 

 appearance as that on the 2 preceding pairs. 



The 4th pair of legs (fig. 5) do not exhibit any distinct 

 demarcation between the endopod and the maxillary process, 

 forming together, as do those parts, a triangular, inward-curving 

 lobe, furnished along the inner edge with 6 short and thick setæ f 

 of which the 4 middle ones are somewhat unguiform in appear- 

 ance and distinctly bi-articulate, with the terminal joint pecti- 

 nately ciliate at one of its edges. Along the inner face, too, 

 occurs a series of close up on 8 setæ, the 4 interior falciform, 

 as in the two preceding pairs. The exopod is very large, and 

 expanded, constituting a broad oval plate, densely ciliate along 

 the inner edge, and provided in addition with 6 plumous setæ, 

 3 of which proceed from the outer edge, the other 3 from the 

 rounded apex; of the latter, the 2 innermost are much smaller 

 than the outer seta. Moreover, immediately above the sac-like 

 epipod, a very thin and pellucid, narrow linguiform lobe is seen 

 to project, delicately ciliate at the tip. 



Finally, the 5th pair of legs (fig. 6) are membranous through- 

 out, and very delicate in structure. The endopodal portion con- 



