Brachiopoda from tlic Bokkeveld Beds. 193 



South Africa. South America. North America. 



S2)irifer of. iJedroanns .... Sp.jwdruaiiHs S'p. mucronatus 



Spirifer sp. /3 Sp. Iccvix 



Spirifer ceres Sp. macrotlnjrh 



Ambocalia umbonata Auib. iiiitbuudta 



Retzia cf. adrieni Iletzia wardiana 



Rhynchospira ? cf. silveti . .Rhynchospira ? silveti 



Leptoccelia Jlabellites . . . .Lepto.Jiabellites Lcpto. Jiabellites 



VituUna pustiiloga Vit. pitstulosa Vit. pustulosa 



It has been stated by Ulrich (oj). cit.) that TrojndoleiJt us carinatus 

 (Conrad), a characteristic Devonian form in North and South 

 America, occin-s in South Africa, but I have not seen any examples 

 of it in the present collection, nor amongst Bain's specimens in 

 the Geological Society's Museum. However, apart from this, the 

 resemblance of the brachiopoda of the Bokkeveld Beds of South 

 Africa to those of the Devonian of the American Continent is very 

 striking, while those of the same formation in Europe constitute a 

 conspicuously different assemblage. 



[Addendum. — In the foregoing description of the small brachiopod, 

 Bhynchosjnra ? cf. silveti, it should have been mentioned that Derby 

 (Nota geol. e. paleont. Matto Grosso, Archiv. Mus. Nac. Eio de 

 Janeiro, vol. ix., 1890, p. 81) has described a new species named 

 Notothyris ? smithii, from the Devonian of Matto Grosso, which 

 from the similarity of its external characters is compared with 

 Betzia jamesiana, though the latter is not known to possess the 

 internal structure discovered in the former. The South African 

 specimens compared with Bhynchosinra ? silveti seem to bear a 

 close resemblance to Derby's species, so far as can be judged from 

 the outward appearance.] 



NOTE. 



Since sending to press the fox'egoing account of the Bokkeveld 

 Brachiopoda, there has been published a work by Dr. Friedrich 

 Katzer, entitled " Grundziige der Geologic des unteren Amazonas- 

 gebietes " (Leipzig, 1903), in which are described certain Devonian 

 Brachiopoda deserving comparison with some of the above-described 

 South African species. The form to which I have referred as Crypto- 

 nella sp. ? (p. 180) may be identical with Oriskania navicella Hall 

 and Clarke, (Pakeont. New York, vol. viii., Brachiopoda, ii., pp. 2G9, 



