400 Annals of the Sontli African Museum. 



that they are specifically separable, but I am not convinced of the 

 advisability of regarding them as distinct, and as already pointed out 

 by me," Messrs. I. Thomas and E. T. Newton support my view, 

 while Clarke i considers that both Sp. antarcticus and Sp. orhignyi 

 are amongst the local expressions of one widely distributed type 

 represented by Sp. arrectus {^ Sp.' nmrchisoni). 



SPIEIFEE sp. 



(PI. XLVIIL, fig. 4.) 



One cast of the brachial valve of a species of Spirifer from Slang 

 Fontein seems to belong to a new species, and is at any rate different 

 to any which I have previously seen from the Bokkeveld Beds. The 

 material, however, is insufficient for a complete diagnosis. The shell 

 is subtriangular in shape, rounded anteriorly, about If times as wide 

 as long, with somewhat pointed lateral angles. The median fold is 

 strongly elevated and rather narrow, and is divided down its anterior 

 two-thirds by a sharp central furrow. On each side of this median 

 fold are 5-6 weak subangular ribs, of w^hich the first pair bordering 

 the fold are well marked for their whole length, but the others are 

 consecutively weaker and only well developed near the margin. The 

 grooves between are wide, shallow and rounded, and the cardinal 

 area of the opposite valve is moderately high, steeply inclined, with 

 a large triangular delthyrium. Length 20 mm. ; width 34 mm. 

 The furrowed median fold recalls Sp. hifidus Eoemer, Sp. ziczac 

 Eoemer, and Sp. williamsi Hall and Clarke, but the plication of the 

 valve more resembles »S^;. duodenarius Hall, Sp). excavatus Kayser, 

 and Sp. raricostatus Conrad. The precise affinities cannot be deter- 

 mined by means of this one specimen. 



EHYNCHOSPIEA ? SIMPLEX (Schwarz). 



The species which Schwarz | described as Trigeria simplex, but 

 which he compared with Rhynchospira jamesiana (Hartt and Eath- 

 bun), may be referred to the genus Bhynchospira with more probability 

 than to Trigeria, as I have elsewhere remarked. ^ Some indifferently 

 preserved specimens from several localities are noticeable in the 



* Reed, Geol. Mag., Dec. 5, vol. iv., 1907, pp. 34, 35 ; and ibid., pp. 170, 171. 

 t Clarke, Some New Devonic Fossils (Bull. No. 107, N.Y. State Mus., 1907), 

 pp. 260-263. 



I Schwarz, op. cit., p. 366, pi. vii., tig. 9. 



§ Eeed, Geol. Mag., Dec. 5, vol. iv., 1907, p. 34. 



