Species of Opisthophthalmus. 167 



Henkries) : No. of pect. teeth in 5 13-16, in $ 19-23; length of 

 carapace in largest ad. ? 14^ mm., in the adult $ 12^-13 mm. 

 (The ad. females are not easily distinguishable from the nearly adult 

 ones in this species.) 



(b) 9 ? (1 ad.) and 7 3 (1 ad.) from Grasmond, Namaqualand 

 (midway between Steinkopf and Jackalswater) : No. of pect. teeth in 

 $ 13-17, in $ 19-23 ; length of carapace in ad. $ 12^ mm., in ad. 

 $ 13 mm. In these and in the type specimens there are no lamel- 

 late modified hairs on the inner side of basal mandibular joint. 



Far. /3. Mr. Schlechter also collected a number of other speci- 

 mens, differing slightly from the type, chiefly in the much larger 

 size (length of carapace in ad. $ 16^-17f mm., in J up to 18^- mm.), 

 and in the relatively narrower hands (width of hand in ad. $ 

 often scarcely exceeding length of hand-back. Lamelliform modified 

 hairs very often present on inner side of basal mandibular joint. 

 Specimens were collected at the following localities, all in Great 

 Bushmanland : 



(a) Aggeneys, Great Bushmanland, Namaqualand Div. (M. 

 Schlechter). 



(b) 6 ad. $ and many young from Gams, Great Bushmanland, 

 Namaqualand Div. (Max Schlechter] : Length of carapace in largest 



$ 17 mm. ; tarsi of fourth pair of legs occasionally, though rarely, 

 with 4 spines on the external terminal lobe. 



(c) 2 ad. $ , about 7 ad. ? , and numerous young from Kykgat, 

 Great Bushmanland, Namaqualand Div. (Max Schlechter) : Length of 

 carapace in largest ? 18 mm., in ad. $ 16J- ITj mm. 



((/) 10 ad. ? and many young from Houmoed, Great Bushman- 

 land, Kenhardt Div. (Max Schlechter] : Length of carapace in largest 

 $ 18-J mm. ; third tarsus in one specimen with only 3 spines on 

 external lobe. 



(c) 6 ad. ? , 2 ad. 3 and many young from Rooibank, Great 

 Bushmanland, Kenhardt Div. (Max Schlechter) : Length of carapace 

 in ad. $ 17-17f mm., in 5 up to 18 mm. ; fourth tarsus very rarely 

 with 4 spines on the external lobe. I append the measurements of 

 the two largest specimens : Adult female. Total length 113 ; length 

 of carapace 17, width 17 ; distance of eyes from anterior edge llf ; 

 width of hand 16i ; length of hand-back 12, of movable finger 16f , 

 of tail 49 ; width of first caudal segment 6, of fifth 4i. Adult male. 

 Total length 115 ; length of carapace 17f , width 17 ; distance of eyes 

 from anterior edge llf ; width of hand 12f ; length of hand-back 

 llf , of movable finger 22^-, of tail 59 ; width of first caudal segment 

 7, of fifth 51. 



