F. R. Coivper Reed — The Bokkeveld Beds, S. Africa. 309 



pedicle valve. Probably the poor specimens referred previously by 

 me ' to Trigeria aff. Gaudryi, Oehlert, belong to the same form. 



If a specific name for this shell is considered desirable, as it is 

 probably distinct from any described by other writers, I would 

 suggest the name rotunda, in reference to its shape. 



Locality. — Gouritz Kiver, north of the Langebergen. 



Ptychospira vaeiegata, sp. nov. (PI. XVI, Fig. 7.) 



In three fragments of the bluish-grey micaceous clay containing 

 Tentacidites crotalinus and Nucidites cf Smitlii, from an " unknown 

 locality," there are the imperfect internal casts and external 

 impressions of a small brachiopod, which, by its shape, plications, 

 and remarkable ornamentation, is closely allied to, though not 

 identical with, Ptychospira ferita (Von Buch) of the Middle Devonian 

 of the Eifel. The typical shape of this European species is rather more 

 elongate and less transverse ; and it has a few rounded, curved 

 plications, increasing in strength towards the margin, the central one of 

 which in the pedicle valve is straight and grooved down the middle. 

 But in our Cape form all the folds ai'e nearly straight, and there seem to 

 be 3-5 lateral ones on each side of the median one, instead of only 

 3, though those nearest the hinge-line are very faint and weak. The 

 whole surface of our shell is also covered with small, closely-set 

 pits, arranged mostly in irregular quincunx fashion, but forming 

 radiating rows gently curved upwards near the cardinal angles, and 

 towards the front there is a tendency for 2-3 adjacent pits to fuse 

 and form short broken lines more or less concentric to the margin. 

 A few concentric growth-ridges are also present. The more trans- 

 verse shape of the shell, the number of folds, their smaller curvature, 

 and the distribution and local fusion of the pits on the surface 

 distinguish this imperfectly known shell from Pt. ferita, of which 

 Sandberger- has well figured the external ornamentation. The 

 average length of our specimens is about 5 mm., and the transverse 

 width slightly greater. 



EXPLANATION OF PLATES XVI and XVII. 

 Plate XVI. 

 Fig. 



1. JBuchiola suhpalmata, sp. nov. x 5. Zwartberg Pass. 



1 a. Ditto. OutKue section of ribs to show shape and elevation, 



2. Ditto. View of another complete shell from above. 



3. Nyassa arguta, Hall (?). x 2. Zwartberg Pass. 

 3«. Ditto. Same specimen, x 2. Anterior view. 



4. Sanguinolites niger, sp. nov. x 1|-. Zwartberg Pass. 

 4«. Ditto. Same specimen viewed from above. 



5. Sanguinolites (?) acer, sp. nov. x 1 J. Zwartberg Pass. 

 5a. Ditto. Same specimen, x If. Anterior view. 



5b. Ditto. Same specimen, x If. Viewed from above. 



6. Rensselceria cf. eonfluentina, Fuchs. x \\. Pedicle valve. Gouritz Eiver. 

 6(7. Ditto. Same specimen, x 1^. Side view. 



7. Ftychospira variegata, sp. nov. x 6. Internal cast of pedicle valve. Locality 



unknown. 



' Reed: Ann. S. Afr. Mus., vol. iv, pt. 3 (1903), p. 178, pi. xxi, figs. 11, 12. __ 

 - Sandberger : Versteiu. Rhein. Syst. Nassau, 1855, p. 330, pi. xxxlii, 

 figs. 13c, d. Hall & Clarke : Palfeont. N.Y., vol. viii, Brach. ii (1894), p. 112. 



