221 



184 



Fig. 92. Scina inermis Chevreux (after Wagler, 1926). 



Pereopods I and II are usual in structure, relatively short and week; 

 the 2nd segment is thin and shorter than in pereopods III and IV. Pere- 

 opods III and IV have a broad 2nd and very narrow 6th segmeat. The 

 length ratios of the 2nd, 4th, 5th, and 6th segments of pereopods III 

 are roughly 20:10:13:10; in pereopods IV the 4th and 5th segments are 

 almost equal in length. Pereopods V are only slightly longer than pere- 

 opods rV; the ornamentation of the 2nd segment is variable: both its 

 margins may be smooth, or only the posterior margin weakly denticu- 

 late, or the anterior margin may have fairly large and the posterior margin 

 weaker denticles; the distal process is small, shorter than the 3rd seg- 

 ment, or it may be totally absent; the 4th and 5th segments are roughly 

 equal in length; the 6th segment is thin, curved and 1/2 the length of 

 the 5th segment; the long, thin claw is 1/3-1/2 the length of the 6th seg- 

 ment. Pereopods VI are considerably longer than pereopods V; the 4th 

 segment is 2/3 the length of the 2nd and almost 1.5 times longer than 

 the 5th or the thin 6th segment, the latter two being equal in length; 

 the claw is absent. Pereopods VII are considerably shorter than the 2nd 

 segment of pereopods VI and are weak; the 4th and 6th segments are 

 almost equal in length and each markedly longer than the 5th segment; 

 the claw is small, with a broadened base, and an acute tip. 



