QQ PROCEEDINGS OF THE NATIONAL. MUSEUM vol.86 



From segment 5 to the caudal end of the body the channels at the 

 back of the anterior snbsegments are large and conspicuous, about 

 twice as long as broad, and separated by distinctly beaded raised 

 lines; in front of the channels the surface is coarsely reticulated. 

 Posterior subsegments strongly convex, the caudal ones decreasingly 

 so, the penultimate segment nearlj^ flat; surface of subsegments 

 slightly rough, with rather coarse reticulations ; dorsum on each side 

 of the middle swollen, the two inconspicuous prominences separated 

 by a depression which is broader and deeper on the front of the sub- 

 segment; high on each side, almost on the dorsum, is a slightly less 

 apparent swelling with the pore on its anterior slope ; pores beginning 

 on segment 5, small, without a raised rim; lateral striations strong 

 and conspicuous, reaching nearly to the pores on segments 4 and 5 

 but still apparent low on the sides of the caudal segments. 



Last segment slight 1}' longer than the two preceding segments 

 together; the apex rather narrowly rounded and with eight setae 

 projecting from the margin; each side with an additional setae. 



Anal valves rather strongly inflated and meeting in a broad, deep 

 groove. Preanal scale only a third as long as broad; front margin 

 rounded, the back margin straighter; processes at the lateral angles 

 small. 



Gonopods as shown in figure 21, d. 



First pair of male legs small and with well-developed claws; other 

 legs without secondary sexual characters. Genital segments rather 

 prominent below; the pleurae of segment 6 somewhat raised over 

 the opening in segment 7 but not produced backward; opening in 

 segment 7 slightly biarcuate behind, its margin strongly raised. 



U. S. GOifERHMENT PRINTING OFFICE: 1938 



