26 Annals of the South African Museum 



(breadth of hand 9, length of hand-back 8-1-, of movable finger 

 and the upper surface is thickly covered with rather coarse and 

 isolated granules ; secondary keels as in the female ; cauda, terga, 

 sterna, operculum, and pectines as in the adult male ; pectines with 

 28 teeth. 



Locality. An adult female and a nearly adult male labelled 

 " Namaqualand," Cape Colony (L. Perinyiicy), and an adult male 

 with no history attached. 



This species is very closely allied to 0. pallidipes, and bears to 

 the latter species very much the same relation that 0. maccr does 

 to 0. fossor. Almost the only important difference lies in the 

 granulation of the carapace, the numerous very coarse granules on 

 each side of the interocular area, so characteristic of 0. pallidipes, 

 are replaced by comparatively fine granules in 0. peringueyi. 

 Further, in 0. pallidipes the carapace is much narrower in pro- 

 portion to its length and its sides are abruptly deflected and very 

 steep, being nearer to the perpendicular than to the horizontal ; in 

 0. pcrinyneyi, on the contrary, the middle part of the upper surface 

 of the carapace passes over quite gradually into the sides, which 

 are inclined at the most at an angle of 45, and the length of the 

 carapace is but slightly in excess of its breadth. 



OPISTHOPHTHALMUS LATICAUDA, 11. sp. 

 Plate IV., fig. 6. 



Male (dry]. 



Colour reddish brown, legs and palps lighter underneath ; the 

 mandibles, fingers, finger-keel, upper and lower posterior crests of 

 the hurnerus and brachium, the maxillary processes of the first and 

 second pairs of legs, the infero-lateral keels of first three caudal 

 segments and the greater part of ventral surface of abdomen 

 blackened ; carapace along the borders of the interocular area also 

 darker. 



Carapace longer than wide, as long as the first and second caudal 

 segment and one-fourth of the third ; its interocular area \veakly 

 granular in front, smooth on the convexities behind, the anterior 

 edge between the eyes and the triangular area distinctly, if some- 

 what weakly, granular ; sides of the carapace coarsely granular, 

 especially along the borders of the interocular area ; median eyes 

 more than a quarter of the length of carapace from the posterior 

 border ; median groove distinctly forked in front. 



Terga densely and minutely granular, with coarser granules in the 

 posterior half of segments 3-6 ; seventh segment coarsely granular, 



