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U.S. NATIONAL MUSEUM BULLETIN 23 6 



Figure 107. — Niiocra affinis Gurney, loc. 592, ad. 9: a, whole animal, dorsal view; b, 

 same animal, lateral view from left side; c, genital somite, ventral view; loc. 591, ad. cf: 

 d, whole animal, lateral view from left side; e, abdomen, lateral view from left side, (a-d, 

 X 165; e X 275.) 



Anal somite shorter than preceding somite, anal flap almost straight, 

 set with spinules. Spinules also border insertion of furcal rami. 

 Anal somite deeply cleft between furcal insertions; cleft part of anal 

 somite haired. 



Furcal rami distinctly broader than long (proportion 3:2), with 5 

 marginal setae and 1 appendicular seta. There are two short, trans- 



