144 Annals of the South African Museum. 



merit 5 granular laterally in the ^ , less granular or almost smooth 

 in the ? , its 4 keels smooth or subcrenular. 



Tail stout, sparsely hairy ; segments 1-4 of equal width, or seg- 

 ments 2-3 slightly wider than segments 1 and 4 ; segment 4 slightly 

 narrower than, as wide as, or even slightly wider than segment 1 ; 

 segment 5 high, segment 1 intermediate between segments 4 and 5 

 in height ; vesicle large, its width f-y that of the fifth segment in its 

 widest part. 



Segments 1-4 with 10 well-developed, granular, sub-moniliform 

 keels ; the inferior keels of segment 1 smooth anteriorly ; infero- 

 median keels of segment 4 abbreviated or indistinct posteriorly ; 

 middle lateral keel of segment 4 well developed throughout its whole 

 length, not at all or scarcely weaker than the adjacent lateral keels 

 of the same segment ; superior keels of segments 2-4 often with a 

 posterior granule enlarged and tooth-like, but not spiniform; superior 

 crests in segment 5 distinct and well developed in the anterior third 

 of the segment, and often again quite posteriorly, but more or less 

 obliterated in the middle, where the dense granulation of the sides of 

 the segment spreads over the upper edges right up to the indistinct 

 row of 4-6 low rounded granules which represent the superior acces- 

 sory crest on either side. Teeth of the inferior lateral keels in 

 segment 5 often only slightly larger and broader posteriorly. 



Upper surface in anterior segments reticularly granular laterally, 

 but very finely and densely granular (shagreened) mesially, the 

 upper surface in the posterior segments smooth or nearly so. Seg- 

 ment 1 very flat above, not grooved mesially, its upper surface -•■ as 

 wide as long, with parallel crests ; the shagreened area very large, 

 flat or only very slightly depressed, occupying in its widest part a 

 little more than half the width of the upper surface, constricted 

 posteriorly and then widened again at the hind margin, its anterior 

 edge slightly projecting forwards in the middle, very broad, equalling 

 half the width of the upper surface, which descends very suddenly 

 and quite perpendicularly along this edge. Segment 2 also flattened 

 above, its upper surface longer than wide, with parallel crests ; the 

 shagreened area generally hghtly concave anteriorly, shaped as in 

 segment 1, but longer and narrower, about 2-2^ times as long as 

 wide, occupying in its widest part half or almost half the width of 

 the upper surface, the anterior edge descending nearly or quite as 

 sharply perpendicularly as in segment 1, and almost straight or 

 curving forwards only slightly in the middle. Segments 3-5 deeply 



* By upper surface is meant the highest portion of the segment, which is 

 bordered by the superior crests. 



