Annals of the Transvaal Museum, 
111 
Fuller made a careful study of these varieties, using the following 
characters for comparison : — 
1. 1’urrows on dorsal shield of female. 
2. Number of rows of teeth on the hypostome. 
3. Form of the mandibles, especially inner apophysis 
4. Extent of dorsal shield of male. 
5. Presence or absence of tail in male. 
The following tables show the relationship of the South African 
varieties and the type as worked out by Fuller; 
I. Furrows of dorsal shield of the female extending to the posterior 
lateral margin — annulatus, and vars. decoloratus and australis : 
II. Hypostome with eight rows of teeth —annulatus and var. australis. 
Hypostome with six rows of teeth — var. decoloratus. 
III. Mandibles with inner apophysis tricuspid — annulatus. 
Mandibles with projections as well — var. decoloratus. 
Mandibles with inner apophysis tricuspid and presenting a 
rounded projection — var. australis. 
IV. Male with shield extending to the posterior margin — annulatus , 
var. decoloratus , and var. australis. 
V. Male with an indication of a tail — annulatus. 
Male with distinct, horny tail — -var. decoloratus and var. australis. 
Based upon these studies Fuller thought himself justified in re-estab- 
lishing Koch's decoloratus , and in making the Australian type a distinct 
species. 
Neumann, after a careful study of a very large quantity of material, 
came to the conclusion that the above distinctions were insufficient from a 
specific point of view, and decided to make them only varieties of the 
original species annulatus. He found that the hypostome in the male bore 
quite constantly eight rows of teeth, but in the female this number varied 
more ; even in the varieties supposed to hear six or ten rows of teeth, he 
found them frequently with a tendency to eight rows ; even in the type 
itself there is a tendency to division. The conditions of the inner apophysis 
of the mandible he found to vary considerably with the condition of the 
preparation studied, and therefore he thought that the tricuspid appearance 
was due to some tendon at the base, looking like a third tooth. He also 
found the caudal prolongation in the male of australis sometimes almost 
disappearing. 
I, myself, have been unable to find eight rows of teeth in decoloratus 
or the third row dividing. 
MARGAROPUS LOUNSBURYI, NEUMANN. 
LounsburyA Tick. 
Mar gar opus lounsburyi , Neumann (1907). 
Plate VII, fi gures a to e. 
Male. — Body flat, oval, with sides convex, wider near the middle of the- 
length, terminated behind by a conical prolongation, longer than wide, 
and wider than thick ; total length (from the anterior extremity of the- 
