SYKES : SOUTH AFRICAN CHITONS. 135 



p. 389, Cape of Good Hope. C. cymhiola, Sowerby (1840), is a 

 synonym. Valve -slits : anterior 8, median 1, posterior 12.' 



Acanthopleiira afra, Rochebrune, 1882. Bull. Soc. Pbilom. (7), yi. 

 p. 192. Cape of Good Hope (Verreaux) ; Madagascar (Admiral Clone). 

 I have been much in doubt whether to admit this species and the 

 nest into this list. The author's determinations are so faulty, his 

 descriptions so incomplete, his figures (when present) so deceptive, 

 that one hesitates to follow him ; but it is perhaps better to admit his 

 species with a caution than to omit them simply because one 

 cannot follow the description and no specimens have been seen in this 

 country. A shell with blue markings and a red girdle hidden by 

 yellow setse. 



Acanthopleura Quatrefagesi, Roehebrune, 1881. Journ. de Conch. 

 xxix. p. 44. Cape of Good Hope (Verreaux) ; Point des Mannelles, 

 etc. (Rochebrune). Stands in the same position as the last ; it appears 

 to have been omitted from the Zoological Record. The shell is said to 

 be indistinctly granulated with a black spiny girdle. 



Onithochiton Uteratus, Krauss, 1848. Die Sudafrik. Moll. p. 36. 

 Natal (Krauss). This and the last two are not mentioned by Mr. 

 Sowerby. It may be separated from P. JVahlhergi by the presence of 

 eyes on the lateral areas, by the greater proportionate size of the 

 girdle, and by the grooved sculpture of the valves. Valve-slits : 

 anterior 8, median 1, posterior none. 



The following, in addition to those discussed above, have been 

 recorded from South Africa, but I do not think they properly belong 

 to its fauna. 



Ischiochiton pruinosus^ Gould. A South American species : recorded 

 from Port Elizabeth by Mr. Sowerby as Chiton pruinosus. 



Plaxiphora Carimchmlis, Gray. Mr. Sowerby gives in his work 

 " Chiton Carmichcelis, Wood," on the authority of AVood. The species 

 was figured but not described by AVood^ in 1828, and later in the same 

 year it was described by Gray.^ It is the same as C. setiger, King 

 (1831). 



Mr. Pilsbry * uses the name of P. setiger on the grounds that it is 

 not quite certain that Gray's shell was the same species, and that 

 Gray's description was a "faulty definition." I have seen the type 

 of P. Carmicha'lis, and the species are, I think, identical. Gray's 

 description is not so good a one as we should require to-day, but his 

 types exist ; they are, I believe, the same species ; the name has 

 three years priority, and therefore I use it. It is a South American 

 species, and the Cape locality was an error. 



' Since this paper was written and read Mr. G. B. Sowerby has recorded (Journ. 

 Conch, vii. p 373) the occurrence of Chiton lyratus, Sow., at the Cape. It was only 

 known previously from West Africa (Reeve). C. Cunaricnsis, D'Orb., is, I think, 

 the same species, and if so this latter name has priority. 



* Index Testaceologicus, suppl. pi. 1. 

 3 Spic. Zool. p. 6. 



* Man. Conch, ser. I. vol. xiv. p. 317. 



VOL. I. JUNE, 1894. 9 a 



