310 Annals of the South African Museum. 



as the Gargasian (Upper Aptiaii) were represented in the Delagoa Bay 

 fauna, and he considered tf Oppelia" vism (d'Orbigny) to be a typical 

 representative of the latter division. Hang* has a zone of "Oppelia" 

 iiixtis above the zone of " Parahoplifes " deshayesi and Ancyloceras 

 matheronianum, which includes the whole of the Bedoulian, but 

 v. Koeueuf records " Oppelia " nisoides, indistinguishable from the 

 example here described, from the zone of " Parahoplites " iveissi, which 

 constitutes his lowest Aptian, below the deshayesi zone. KilianJ con- 

 sidered that the occurrence of Aconeceras nisnm in the Upper Aptian 

 (Gargasian) of the South of France indicated a migration of this 

 genus from north to south, but it seems to the writer that the range 

 in the Aptiaii of this form and of its close allies, like A. nisoides, is 

 not yet known. 



It has to be noted in this connection that the suture-lines 

 of the two forms of Cheloniceras agree with that of Ch. cornue- 

 liuint.Di (d'Orbigny) much more than with those of the Acan- 

 thoplHes of the biyoureti group ; and Ch. cornuelianum is put into 

 the Lower Aptian both by Kiliaii|| and by R. Douville,T[ Avhereas, 

 according to Haug,*^ at la Bedoule. Ch. cornuelianttni occurs both 

 in the lower Aptian, i. e. in the true Bedouliau, and in the higher 

 division (G-argasiaii), and it is associated with " Oppelia " nisus also 

 at other localities. ft 



The relations of the Delagoa Bay fauna with those of other parts of 

 Africa, of Madagascar, India, etc., were ably discussed by Krenkel in 

 the paper quoted above, and in another memoir on the Lower Creta- 

 ceous of East Africa.}}: Zwietzycki later described a fauna, from 

 doubtful localities in East Africa, that included Acanthoplites (?) raiiffi, 

 Zwietzycki sp., and Diadochoceras nodosocostatum, d'Orbigny sp. The 

 former is compared with Cheloniceras cornuelianum, and only differs 

 from the example here described as Ch. gottschei in retaining bitubercu- 

 lation to a larger diameter ; but it probably is an Acanfhoplites of the 



* Traite, II, ii, p. 1170. 



t " Amm. d. Nordd. Neoc.," 'Abh. K.Pr. G-eol. L.A./ N.F., Heft. 24 (1902), p. 51. 



J In Lethaea Geogn. II, Mesoz. 3, Kreide, I, 3, 1913, p. 338. 



In his latest paper (' Trav. Lab. Geol. Univ. Grenoble/ vol. xii [1919], 

 p. 94), Kilian has A. nisoides as Gargasian. 



|| Loc. cit. (1910), p. 281. 



IT 'Pal. Univers./ 1911, No. 209. 



** Loc. cif., p. 1198. 



tt E.g. pp. 1183, 1191, loc. cit. (Haug). 



l\ ' Beitr. Pal. Ost.-Ung.,' vol. xxiii (1910), pp. 230-250. 



"D. Ceph. d. Tendaguru-Sch. i. Deutsch. O. Afr.," ' Wiss. Erg. d. Tendag. 

 Exp., 1909-12/ pt. iii, 'Arch. f. Biontol./ 1914, vol. iii, pt. 4. 



