Annals of the Transvaal Museum 
53 
row of the double series is quite continuous with the single series. The outer 
row includes four teeth of which the distal one is the largest, but is not so 
large as the adjoining fifth tooth of the single series. The inner row includes 
three teeth, of which the first is largest and is widely separated from the second 
as well as from the single series: the basal tooth is quite small. In the lower 
jaw there is only one intermediate tooth. Both upper and lower jaw are 
strongly compressed from side to side : the lateral distal keel on the outer side 
of the lower jaw thus becomes carried ventralwards, and is not continued 
into the granular crest which runs along the middle of the basal portion of the 
jaw. The lower jaw has great depth, and thus in side view has a massive 
appearance. Stridulatory ridges are well developed on the chelicerae, number- 
ing about 12 in the male, and 9-10 in the female. Feather bristles are not well 
developed on the lower jaw of the male: it resembles that of the female but 
is not so strong. The flagellum of the male has various points in common with 
that of cuneicovnis , and it may be noted that the upper margin of the basal 
enlargement is elongated in both, and that the upper and posterior margins 
are acutely inclined to each other, with a large high keel at the angle. The 
procurrent portion of the shaft lies on the upper surface of the jaw, and is not 
sunk into a groove: on the mesial side of the fang superiorly, just in front of 
the anterior bend, an ill defined ridge occurs. 
Key to the S. African species of Zeriassa. 
1. Shaft of flagellum short, very broad at the anterior bend, being 
there almost twice the width of the fang below it, thence gradually 
narrowing towards the middle where a slight twist occurs and the shaft 
bends outwards slightly, ending in a point (apparently) a short distance 
beyond the basal enlargement. Basal enlargement with triangular out- 
line when viewed from the side. Dentition of single series of upper jaw 
continuous, including five teeth: lower jaw with one intermediate tooth. 
Z. cuneicovnis Purcell. 
2. Shaft of flagellum very broad throughout its length, tapering 
somewhat up to the distal twist but expanded a little near the apex, 
which carries a short slender hook-like process: it extends only a trifle 
beyond the basal enlargement. Upper jaw with six teeth in the single 
series: lower jaw with two intermediate teeth, and the distance from 
the tip of the fang to the apex of the first tooth is subequal to the distance 
between the apices of the two large teeth. Z. purcelli Hewitt. 
Genus Daesia Karsch . 
Daesia suhulata Purcell, 1899. Annals S. Af. Mus. 1. p. 393, fig. 12. 
The type male came from Van Wijk’s Vlei, Carnarvon. 
Daesia hernhardi Pocock, 1900. Annals Mag. Nat. Hist. 7, vi. p. 317. 
The type is a female from Hex River Valley. The character of spines and 
ridges on the sides of the abdomen interiorly, considered by Pocock to be 
distinctive of this species, occurs also in leipoldti, lineata, and probably also in 
other species. I may remark that these structures are easily overlooked, for 
the sides of the abdomen are densely hairy and the spines and ridges quite 
small. To see them it is necessary to stretch out the integument and examine 
