126 A Him!* of the South African Mnx<'in>t. 



The name Acanthodon, therefore, should have lapsed. Seyregara 

 takes its place for forms with sternum (<i) (Text-no-. 11) ; Idiops 

 form (d) should include form (e) ; and form (I) would retain the 

 name Gorgyrella (Purcell, 1902). For the above and later reasons 

 Hewitt's inclusion of (,), (6), and (c) under ArmifJtodnH is not 

 considered valid. 



THE NAME ACANTHODON. 



In 1833, Delictus Anim. Ac., pp. 197-8 (pi. 39, fig. 5), Perty founds 

 the genus Jdiops on a $ specimen, I.ftiscus, from Brazil. 



In 1837 Walckenaer, in Ins. Apt. vol. i, p. 379, misquotes the type 

 us J. /K-ulcitt nx, and makes it synonymous with 8phasns (now a synonym 

 of Oj'i/i'ijie* . Fam. Oxyopidae) . In 183H-9 Gucrin in ' Arachnides du 

 Vovage de la Favorite, 1 and ' Rev. Zoologique' founds the genus Ac<m- 

 Ihodon on a $ specimen from Brazil, and this name is used by 

 Walckenaer in " Supplement a. I'Ordredes Araneides," Ins. Apt. vol. ii 

 p. 434. In P.Z.S, 1870, p. 101, O. P. Cambridge gives a short resume 

 of the history of Idinps (Perty), in which lie states that " M. Grumn- 

 Meneville (without any reference to the genus established by M. 

 Perty) founded the genus Acanthodon upon another spider undoubtedly 

 congeneric with that upon which the geaus Idiops had been previously 

 established"; and that Walckenaer appears to have overlooked its 

 identity with Idioji* when including it in Ins. Apt. t >m. xi, p. 434 (not 

 234, as' quoted inP.Z.S.). 



In 1871 Ausserer separates I. sigillxtitx, described by Cambridge in 

 1870, as a new genus Idiosoma (Verh. z. b. g. Wien, 1871, p. 150). 



In 1892, Hist. Nat. des Ar., both Acanthodon and Idiops are 

 included by Simon under Idiopeae, the main separating characters 

 being given on pp. 89 and 92 as the eyes ; the name Idiops is here 

 applied to the American species only. 



In P.Z.S. 1897, p. 731,Pocock divides the species referred to Idiops 

 I iv Cambridge in 1870, and places the two African forms (meadii and 

 thorelli) in the genus Acanthodon ; probably according to Simon, 

 although no reasons are given for the separation. A new species, 

 Acanthodon lacustris, is also described from 2 9 specimens (Lake 

 Tanganyika), and the diagram of the sternum coincides with that for 

 Idiops and Ctenolophus (Text-fig. 11 (c) and (d) ), which is accounted 

 for as below. (Simon later puts A. lacustris in his genus Titanidiops, 

 Hist, Nat. des Ar. 1903, p. 890). 



In 1898, A.M.N.H. (7), vol. i, p. 320, Pocock describes anew species, 

 Acanthodon preforiae, from South Africa, and tabulates it with the 

 other African species. 



