Myriapoda of West Africa. 33 



Labrum with a deep and rather narrow sinus and no trace of the teeth 

 which are so nearly universal in Chilognaths. 



Eyes of the usual semi-lemniscate shape, distant from each other by a space 

 equal to the transverse diameter of an eye ; ocelli of the right eye of the 

 specimen examined 10 + 11 + 10 + 9 + 9 + 5 + 5 -j- 1 = 60, of the left 10 + 

 114-'^"4-^-|-S4" 6-j-3 = 55. The ocelli of the upper parts of the eyes are, 

 as is usual in Spirostrepti , many times larger than some of the lower ones. In 

 the left eye the arrangement into transverse rows is so broken as to make the 

 above formula rather arbitrary. 



Antennae with the second joint longest, but not as long as the fifth and sixth 

 taken together, the other joints decreasing in length from the second ; length 

 12 mm., transverse diameter of joint 1.2 mm. 



Mandibulary stipe with its outer surface oblong, subrectangular, surrounded 

 by a raised margin. 



Masticatory plate twice as long as broad, triangular, surrounded by a raised 

 margin ; broad end a deep groove separated from the remainder of the surface. 



Mandibulary tooth oval, with the sides rather straight and the end trun- 

 cate ; more than twice as long as broad. 



Dentate lamella of five teeth, which are either entirely connate or witlia 

 shallow incision separating them, so that the cutting edge of the lamella is 

 nearly straight. 



Pectinate lamellae of eleven complete rows of blunt, curved spines. 



Hypostoraa arcuate, the ends longitudinally striate on the inferior surface, 

 anterior edge straight. 



Mentum nearly rectangular, about six times as long as broad, the surface 

 rough. 



Promentum with posterior margin straight, the anterior but little convex ; 

 anterior two-thirds concave, with a curved line of demarcation; anterior third 

 beset with bristles. 



Stipe with a fringe of bristles along the margin to near the base, and along 

 the interior margin opposite the promentum ; a very short blunt bristle near 

 the anterior-interior corner. 



Lingual laminae beset with bristles on the posterior portion, and with a few 

 long ones anteriorly. 



First segment anteriorly finely wrinkled, posteriorly more coarsely, with 

 occasional shallow depressions, one of which on each side close to the median 

 line is much more pronounced ; lateral inferior margin nearly straight, corners 

 rounded, not produced ; three of the usual striationg run diagonally across 

 the segment, while one or two are interrupted. Starting from the middle of 

 the superior striation is a longitudinally directed furrow, and just above this 

 a very pronounced convexity of the surface of the segment, bearing on the 

 middle portion several shorter longitudinal furrows ; the whole posterior por- 

 tion of the segment is swollen, appearing noticeably convex when viewed from 

 the side ; posterior edge strongly emarginate, tliough the segment is twice as 

 long in the middle as near the lateral edge. 



Subsequent segments have about twelve irregular and broken concentric 



Annals N. Y. Acad. Sci., VIII, April, 1893.— 3 



