46 Mr. li. I. Pocock on 



widtli 9"2, height 6 ; length of movable dactylus 95, of 

 immovable (along free border) 5. 



A single male s])ecimen from the Miirchison Range in the 

 Transvaal, collected and presented to the British j\luseum by 

 My. C. E. Jones, with whose name I have very great pleasure 

 in associating this remarkable new form. 



Hetekocharmus, gen. nov. 

 (PI. III.B. figs. 2, 2a, 2b.) 



? Channm, Karscli, Mitth. Miinch. Eut. Ver. 1878, ])p. 101, 104, 10-5. 



Cephalothorax without keels ; the ocular tubercle in the 

 anterior half ; the frontal region horizontal, not sloped down- 

 wards from the tubercle to the anterior margin ; three lateral 



Tergites with a single median keel. 



Sternum ^ms\] , pentagonal, wider than long, about equal in 

 length to the genital operculum. 



Fectines normal. 



Stigmata elongate. 



Chelicerce with movable dactylus bifid at the apex, the two 

 fangs equal in length, with three teeth on the upper edge and 

 two on the under ; immovable dactylus with two teeth above 

 (the posterior bifid) and two subequal teeth below. 



Chelce with the external series of teeth formed by the 

 enlargement of the three ])Osterior teeth of the median rows, 

 the internal series formed by single enlarged teeth, separated 

 from the apices of the median rows and constituting with the 

 teeth of the external series short oblique rows. 



'rail somewhat powerful ; no spine beneath the aculeus. 



Legs of third and fourth pairs with tibial spur. 



Claws free. 



In its broad pentagonal sternum this genus departs widely 

 from what is normal in the Buthida?, and its inclusion in this 

 family will necessitate the abandonment of the definition 

 '' sternum subtriangulum." Nevertheless I think it should 

 be referred to this group, for in the sum of its characters it 

 is unmistakably Buthoid. 



In the dentition of the chelicera3, the form of the palpi, 

 with their slender unkceled hands and long dactyli, the 

 arrangement of the denticles on these dactyli, the spurs on the 

 tibiie of the posterior legs, the keeling of the trunk, &c., it 

 agrees closely with many genera of this family. It only 



