180 Annals of the South African Museum. 



CRYPTONELLA sp. ? 

 (Plate XXII., fig. 3.) 



With the species known as Cryptonella haini there is found 

 .associated another smaller and somewhat different form (No. 132), 

 but it does not seem probable that it represents merely the young 

 •or a variety. This smaller form is of a longitudinally oval shape, 

 moderately convex, with a pedicle valve somewhat ridged along the 

 middle. The beak is prominent and pointed, and the dental plates 

 .are small. The surface would be smooth but for faint concentric 

 striae. 



In shape this species is relatively more elongated than Crypt, 

 haini, and the ridged pedicle valve recalls Centronella glansfagea 

 Hall,''' from the Oriskany and Corniferous Groups of America. It 

 is impossible to decide whether it should be referred to Centronella 

 or Cryptonella, but it somewhat resembles pre-adult individuals of 

 Crypt, planirostra, Hall.f 



Dimensions. — Length 10-11 mm. ; width 7-8 mm. 



Locality. — -(No. 132) Kloof north-west of homestead on Laken 

 Yley, Ceres. 



Family SPIEIFEEID^. 



SPIRIFER OEBIGNYI, Morris and Sharpe. 

 (Plate XXIL, fig. 4.) 



1846. Spirifera Orhignii, Morris and Sharpe, Quart. .Tourn. Geol. 



Soc, vol. ii., p. 276, pi. xi., fig. 3 a h c. 

 1856. Spirifcr antarcticus, Sharpe, Trans. Geol. Soc, ser. 2., 



vol. vii., p. 206, pi. xxvi., figs. 1, 2, 5. 

 1856. Spirifcr Orhignii, Sharpe, Trans. Geol. Soc, ser. 2., vol. vii., 



p. 207, pi. xxvi., figs. 3, 4, 6. 

 1893. Spirifcr Chuquisaca, Ulrich, Neues Jahrb. f. Min., Bail. 



Bd. viii., p. 65, t. iv., figs. 19, 20 ci^c. 

 ? 1897. Spirifcr antarcticus, Kayser, Zeitschr. deut. Geol. GeselL, 



xlix., p. 297, t. ix., figs. 1-4. 



This species is exceedingly common in the collection, and is by 

 ar the most abundant form of Spirifcr. After a careful examination 



* Hall, ralffiont. N.Y., vol. iv., p. 399, pi. Ixi.a, figs. 1-21. 

 t Ibid., p. 39o, pi. Ixi., figs. 9-27. 



