260 Annals of the South African Museim). 



20. BACULITES cf. BREVICOSTA, Scliliiter. 



(PL XXIV, figs. 5, 5</.) 



1876. Buculites Irevicosta, Schliiter. "Cephal. d. Ob. Deutsch. 



Kreide," Palaeontogr., vol. xxiv, p. 141, pi. xxxix, figs. 9 and 10. 

 [Non 1885. Bacnlites brcvicustu, Schliiter, in Moberg, loe. cit., p. 37, 



pi. iv, figs. 5 and 6.] 



One example (No. 5461), showing nine nodes in a length of about 

 30 mm., apparently agrees with Schliiter's species, but it is not 

 definitely identified with the species of the Emscher marls, since it 

 probably only represents a variety of B. capensis ; that is to say, its 

 exact agreement with Schliiter's species* may be a case of hetero- 

 chronous homoeomorphy. The suture-line agrees with that of B. 

 capensis, and differs from that of B. anceys&s figured by cTOrbiguyt in 

 having the two lateral lobes much narrower, and in having the 

 siphonal portion of the ventral saddle smaller than the internal 

 branch, an arrangement also seen in a specimen of B. incitrvatus, 

 Dujardin, in the writer's collection. The suture-line of B. anceps? 

 figured in SchliiterJ al?o has a comparatively large second lateral 

 lobe. What Schliiter states to be observable in the type of B. brevi- 

 costa, namely, " saddles that are considerably broader than the lobes, 

 and inferior lateral lobes that lie almost completely on the anti- 

 si phonal side," agrees with the characters of the suture-line of the 

 Zululand form. B. fairbanksi, Anderson, though differing in orna- 

 ment, has the same type of suture-line as B. capensis and B. cf . brevi- 

 costa, but with a more minutely frilled edge. 



LoL-allhj. Umkwelane Hill. Coll. Dr. A. L. du Toit. 



21. BACULITES sp. cf. SULCATUS, Baily. 



1906. Buciilites siilcatus, Baily. Woods, " Cret. Fauna of Pondolaud," 

 Ann. S. Afr. Mus., vol. iv, part vii, No. 12, p. c'41, pi. xliv, fig. 4. 



One terminal fragment of a larger specimen (No. 5467), characterised 

 by the absence of nodes, is striated like Baily 's species, but the 



* Werner (in ' Die Granulat. Kreide. d. West/I. Miinsterland.," ' Zeit. Deutsch. 

 Geol. Ges.,' vol. Ivii (1905), pp. 207 and 228), who records this species from the 

 zone of Inoceramus cardissoides, states that the nodes (" ribs ") are crescent- 

 shaped, whereas in the present example they are rounded like those of H. 

 capensis. 



f ' Pal. Franc;. Ter. Cret.,' I (1840), p. 565, pi. cxxxix, fig. 7. 



X Loc. cit. (1870), pi. xl, fig. 6. 



Loc. cit., p. 92, pi. vii, figs. 152 and 153, and pi. x, fig. 194. 



