164 Transactions of the Royal Society of South Africa. 
full description of the type female were available, yet it seems permissible to 
accept Kraepelin's general account of the species in ' Das Tierreich ' so long 
as we include therein all South African forms of Hadogenes in which the 
anterior margin of the carapace is deeply incised. 
The following varieties of this species may be recognised : H. trichiurus 
var. whitei Purcell (PL XXXII, figs. 94 and 95, also text-fig. 4), described 
(16) from Brakkloof, near Grrahamstown. We have a specimen also from 
Text-fig. 5, -Outlines of fifth caudal segment and vesicle in side view of — 
1. Female of Hadogenes trichiurus graciloides from Cradock. 2. Male of 
same. 3. Male of Hadogenes trichiurus coffer from Keilands. 4. Male of 
Hadogenes trichiurus ivhitti from Brakkloof. (Drawn with the aid of an 
enlarging camera ) 
the neighbourhood of Alicedale (W. W. Austin). Dr. Purcell described it 
as a distinct species, but may have attached too much importance to G-ervais's 
figure of trichiurus. The Brakkloof, Fish River Eandt, and Alicedale 
specimens are certainly characterised by the stoutness of the first caudal 
segment, especially in female specimens, but it seems doubtful if this form 
can be sharply marked off from the one which occurs near the Kei River. 
The pectinal teeth are, male 17, female 12-14. 
We have a small adult male from Queens Road (about midway between 
