Annals of the Tkansvaal Museum. 
183 
also at Middelburg. It has also been taken at Wonderfontein Station, 
Middelburg, and at Steynsdorp ; a small specimen was found at Rosslyn, 
Pretoria, by Mr. G. van Dam, and a larger one at Lyttelton Junction 
(1st March, 1916). The largest example has a total length of 22 mm., 
the carapace being 8 mm. long and 7 mm. broad. 
The species was originally described (Records, Albany Museum, II, 
p. 412) as a Ctenolophus, Pure., and was afterwards referred to the genus 
Gorgyrella Pure., but I now regard both these proposed genera as synonyms 
of Acanthodon Guer. 
This species is very closely related to Gorgyrella schreineri Purcell. 
The most obvious difference between schreineri and transvaalensis lies in 
the spinulation of coxa III : in schreineri those spinules are coarse and 
comparatively few, whereas in transvaalensis they are very numerous and 
much smaller than in schreineri. The first pair of sternal sigilla, though 
not marginal nor submarginal, are only a little internal to the edge of the 
sternum — a diameter or slightly more : in the small specimen from Rosslyn, 
however, they are practically marginal. Patella III has 9-21 spines on 
Text Fig. 4. 
Ventral surface of coxa of third leg to show spinous areas in (a) Acanthodon schreineri 
(Purcell) from Victoria West, ( b ) Acanthodon transvaalensis (Hewitt) from Middelburg. 
Transvaal. 
its anterior surface, including those at the distal edge. The other species 
Acanthodon schreineri Purcell, is known to me from the following localities : 
Bloemfontein (Dr. T. F. Dreyer), De Aar (F. C. Cronwright-Schreiner), 
Victoria West (B. Marais), Whittlesea (Miss S. Chinn), Fort Brown (Miss M. 
Howarth), Grahamstown (Miss N. Webb), Schurfteberg, Somerset East 
District (Mr. B. Marais), Worcester (Mr. G. B. Townshend), Adelaide 
(Miss Van der Vyver), Kimberley (Bro. J. H. Power). 
It will probably be possible to distinguish a number of local races 
in this species on the different ocular characters. 
Acanthodon schreineri Purcell, var. nov. minor. 
The types of this form are an adult male and female from Roodeplaat, 
Pretoria District, collected by Mr. G. van Dam (22nd February, 1916). 
They were found under the protection of stones on the top of a stony kopje. 
A female specimen was also collected by Mr. A. Roberts at Bon Accord, 
Pretoria District (13th June, 1915), and others more recently at New 
Muckleneuk. 
