32 3Iyriapoda of West Africa. 



Subsequent segments with about seventeen concentric striations on the 

 anterior portion, on the striations small protuberances distant from each 

 other by a space equal to that between the striations ; posterior portion with 

 very fine longitudinal wrinkles and furrows ; the striations which are strongly 

 developed below, extend considerably above the pores on the anterior seg- 

 ments. 



Repugnatorial pores below the middle line, longitudinally elliptical, situated 

 near tlie suture whicli is sinuate in front of tliem, especially on the anterior 

 segments. 



Last segment with the posterior portion slightly depressed and more rugu- 

 lose, with rounded mucro, the margins slightly uneven below. 



Anal valves nearly smooth, not very prominently inflated, the margins not 

 strongly compressed, of moderate thickness. 



Pre-anal scale two and one-half times as long as wide, posteriorly very 

 obtuse, rounded. 



First pair of legs with their large sternum hirsute on the median portion of 

 the expanded surfaces, and a fringe of bristles along its margin ; coxa large, 

 flat, punctate, and liispid with short bristles, provided with a conic curved 

 dorsally directed process. 



Third and subsequent pairs of legs with a large, pointed, transparent, chiti- 

 nous process arising from the distal half of the penultimate joints, becoming 

 smaller posteriorly. 



Genitalia of male — see plate II, figs. 18, 19. 



Color of alcoholic specimens: head, first spgmeut, and posterior part of 

 subsequent segments brownish-black ; anterior portion of segments dull 

 reddish-brown ; colors lighter below, feet and antennae dark reddish. 



Length 170 mm. ; greatest diameter 10 mm. ; 72 segments. 



Habitat. — Two male specimens with the label " Congo, Dec. 26." 



5. Spirostreptus anodonttis, sp. n. 



Plate III, fig. 23. 



Body cylindrical, gradually narrowed anteriorly to the fourth segment, then 

 increasing to the first ; narrowed gradually posteriorly from the GOlh to the 

 66th, and thence rapidly decreasing. 



Covered portion of ei>icranium with strongly pronounced longitudinal stria- 

 tions running into the transverse furrow in front. 



Vertex finely rugulose, with coarse striae running diagonally into the 

 strongly pronounced median sulcus which meets the transverse intra-ocular 

 suture in a longitudinally oval depression. 



Clypeus finely rugulose ; below and mesad of the antennae a deep, irregular, 

 rugose depression ; median portion of lower part of clypeus strongly convex, 

 but the lateral margins rather abruptly flattened ; upper row of four nearly 

 obsolete punctations reduced to shallow depressions ; lower row also reduced 

 to shallow, longitudinally oval depressions, either without any protuberance 

 at bottom, or with it very small and blunt ; about nine punctations on each 

 side of the emargination, and six ur seven very rudimentary ones behind it. 



