266 Annals of the South African Museum. 



At Umkwelane Hill, as in Pondoland, it is chiefly the resemblance 

 of the Mortoniceras to If. texanum, and of PseudoscJJoenbachia to 

 Grossouvre's Coniacian-Santonian forms that suggests the presence of 

 pre-Canipanian horizons. 



The additional evidence, however, is not very satisfactory so far as 

 exact dating of the beds within the Senonian is concerned ; and it is 

 hardly safe, from the evidence available, to assume the complete 

 absence of pre-Campauian horizons at Umkwelaue Hill. Placenticeras 

 subkaft'i-arium, nov., is close to PI. tamulicum, Kossmat, which occurs 

 in the Upper Trichinopoly group of India ; and at the Manuan Creek, 

 this new form, or a close ally, is associated with Kossmaticeras 

 (Madrasites) bhavani, Stoliczka sp., also common to the Upper 

 Trichinopoly and the Aryalur groups. Now the former group includes 

 Peroniceras dravidicum, Kossmat sp., which is here described from 

 the junction of the Mauuan and Umsinene Rivers, whereas two other 

 forms of Peroniceras (P. cf. czornigi, Redteubacher sp., and P. cf. 

 rousseauxi, Grossouvre) were included in the collection described by 

 the late G. C. Crick. The presence of the Coniacian in Zululaud is 

 thus established. 



Again, the new genus Diaziceras, the type-specimen of which is 

 associated in the same block with Bostrychoceras ? sp. ind., a form 

 that is comparable with certain Upper Senonian types of the Hokkaido 

 and of California, is here considered to be related to Pseudoscliloen- 

 bachia papillata from Pondoland, but in suture-line the new genus is 

 very close to Lenticeras andii, Gabb sp., or L. baUai, Lissou, whereas 

 "Barroisiceras" desmoulinsi, Grossouvre sp., resembles it very much 

 in external characters. Both these genera are of Lower Senouian 

 age ; Barroisiceras occurs associated with Peroniceras in Madagascar 

 and the Cameroous ; Lenticeras is associated with Mortoniceras 

 texanum in South America. 



It may also be pointed out that the new collection of Pondoland 

 fossils belonging to the Durban Museum, and referred to in the intro- 

 ductory part of this paper, contains " Puzosia " sugata, Forbes sp., and 

 an Ammonite resembling the Madagascar example of "B. haber- 

 fellneri (Hauer)," figured by Boule, Lemoine and Thc'venin.* This 

 new form may, perhaps, be more nearly related to certain Upper Chico 

 types, e.g. " SchJoenbachia " chicoensis (Trask), Anderson,! though 

 similar " Barroisiceras " also occur in the Lower Chico formation, but 

 are not satisfactorily separated from numerous forms that may be true 

 Prionocyclus. "Puzosia'' sugata, also, is recorded from the Lower Chico 



* Loc. cit. (1907), ii, p. 43, pi. xi, fig. 3 only, 

 t Loc. cit. (1902), p. 116, pi. ii, figs. 23-25. 



