no. 1831. NEW TROPICAL MILLTPED8—C00K. 457 



Repugnatorial pores indicated by a small elevation at the base of 

 the posterior lobe of the carina of segments 5, 7, 9, 10, 12, 13, 15-18: 

 these segments also lack a distinct conic tubercle near the middle of 

 the carina, present on other segments. (Fig. 2.) 



Supplementary margins divided into minute oblong plates, over 

 twice as long as broad, the distal end entire and rounded. 



Anterior subsegments separated by a very deep and abrupt trans- 

 verse constriction; surface very minutely reticulate-punctate, the 

 markings arranged in transverse rows on the posterior part of the 

 subsegment, the last row very regular and elongate. 



Segments 17-19 with last tubercle of dorsal row enlarged into a 

 papilliform or cylindric process projecting obliquely backward; 

 process of segment 18 largest. 



Last segment reduced and almost completely covered from above, 

 exceeded by the produced carinae and dorsal processes of segment 19; 

 setiferous apex of segment covered with a broadly rounded median 

 lobe, with a smaller and more pointed lobe on each side, also two 

 distinct setiferous tubercles farther down along the posterior margin. 

 Anal valves nearly flat. Last sternum broadly rounded with two 

 minute setiferous tubercles, the apex not 

 produced. 



Sterna very narrow, scarcely as wide as 

 the articulations of the legs; surface smooth, 

 with a rather slight longitudinal and a more 

 distinct transverse impression. FlG - s- l0M us mcisus. gono- 



1 . . . PODS, ANTERIOR SIDE. 



Legs rather slender, joint 2 over twice as 

 long as joint 1, about two-thirds as long as joint 3; joints 4 and 5 

 short, subequal, rather robust, about as broad as long; joint 6 very 

 slender, longer than joint 3. 



Gonopods with a large hollow, clypeate basal joint closing over 

 the small apical joint. Basal joint, viewed from in front, with a 

 rounded-triangular outline, tuberculate near the outer angle and 

 with a small notch near the lower inner angle; broadly and deeply 

 emarginate on the posterior face. Second joint with three simple 

 plates, two narrow on the anterior side and one on the posterior, 

 shorter, broader, and more strongly incurved at apex. The longer 

 anterior plates cross the median line. (Figs. 3 and 4.) 



Pocock says that the sterna of Docodesmus are "as large as in 

 Polydesmus" and that the sternum of the eighth segment is "fur- 

 nished in front with a pair of tubercles tipped with a brush of hairs, 

 a somewhat similar tubercle being noticeable upon the coxa of the 

 anterior legs of this somite." The sterna of Iomus are much nar- 

 rower than in Polydesmus and show no indications of such tubercles 

 either on segment 8 or elsewhere. The sternum of the third segment 

 of the female has a slight transverse ridge and a very broadly trian- 



