On Cretaceous Cephalopoda from Znliiluxl. 257 



assemblage on the one hand, which connects directly with the loosely 

 coiled Bostrychoceras above described, and on the other the various 

 European " Ha mites" (" H." roemeri, Geinitz), " Tuxoceras " (T. 

 aquisgranensis, Schliiter), " Ancyloceras" (A. retrorsiuii, Schliiter) of 

 slightly earlier date and simple suture-line. Whether these Cam- 

 panian " Hamitids " are ancestral to the Maestrichtian Diplomoceras 

 and what their relationship is to the contemporaneous " Ptychoceras " 

 and Solenocera* it is for future investigation to determine. It may 

 be added that a form indistinguishable from the Maestrichtian 

 Diplomoceras cylintlricuiH, d'Orbigny sp., occurs in the Cambridge 

 Greeusaud (Uppermost Albian), but the writer is convinced that this 

 is only a case of convergence, and that even the Turouiau " Hamitids " 

 should lie separated generically from the Senonian forms. The last 

 true Haiitites are comparatively rare in the Ceuomanian. 

 Locality. Umkwelane Hill. Coll. Dr. A. L. du Toit. 



FAMILY: BACUL1TJD.-E. 

 GEN. BACULITES, Lamarck. 



17. BACULITES CAPENSIS, H. Woods. 



( PI. XXIV, tigs. (5 and 7.) 

 I>,ii-iiliti'x i-npt'ii*!.*, Woods. " Cret. Fauna of Pondoland, 1 ' Ann. 



S. Afr. Mus., vol. iv, part vii, No. 12, p. 342, pi. xliv, figs. 6 and 7. 

 ? 1907. Baculites vityinu, Forbes in Boule, Lemoine & Thcvenin. 

 " CV'ph. Civt. Diego-Suarez," Ann. de Pal., vol. ii, p. 65, pi. xv, 

 tig. 3. 



This is the commonest ivphalopod at Umkwelane Hill, sixteen 

 examples being referred to this species, in addition to a number of 

 fragments in the matrix of other fossils. The young is merely striate, 

 like B. baili/i, and the nodes first appear where the long diameter is 

 about 8 mm. 



Woods compares the species with B. asper as figured by Morton, 

 Rumer and Stauton, the last probably of Turouiau age. The less 

 coai'sely nodate form figured by Meek,* and a specimen of this in the 

 British Museum from " Mississippi " are very close to the South 

 African species in all characters but the suture-line. 



Some of the larger examples (No. 5479A, 5403) seem to develop 

 coarser striation on the siphoual side, much like the example here 

 compared with B. sulcatus, Baily. The suture-line differs rather 

 * Loc, cit. (1876), p. 40-4, pi. xxxix, fig. 10 a only. 



