On Cretaceous Cephalopoda from Zululand. 239 



Kossmat, yaudaiua, Forbes, etc.)- When ornament appears in 

 Hauericeras (H. buszii, var. nodosa and var. costata, Wegner*), it does 

 so at a late stage ; and the periphery of the cast is barely sharpened 

 in H. yardeui at a diameter of 60 mm., which accounts for the fact that, 

 e. (j., Pervinquiere,t who, unlike Nowak, clearly recognised the hollow 

 keel, found the casts of his small examples perfectly rounded. 



The assemblage mentioned by JSTowak includes Albian, Cenomaniau, 

 Turoniau and Seuouiau forms and is most heterogeneous. Sharpe's 

 A. goupilianus (nun d'Orbiguy) is only a smooth variety of Scldoen- 

 bachia varians, Sowerby sp. Whiteaves' newly-created ScJiJ. propinqua 

 has as little to do with Stoliczka's earlier ^4. propinquus, as 

 Anderson's Sell. ^rnpiu^ua% (Stol.), possibly a Turoniau Prionotropid, 

 is related to the Indian species. Such Albian forms as A. acuto- 

 carinatus, Shumard, belonging to the group of A. roissyanus, 

 d'Orbigny, $ again, arc as little related to the true Ceuomaniaii 

 Schloeribachia or to " Prohauericeras," as the Neocomian Oosterella 

 cultrataeformis, Thlig sp., is to either. 



Since Prohauericeras has been proposed, it may be convenient to 

 retain it|| for A. youpilianus, d'Orbigny, which apparently was intended 

 to be the type, since Nowak mentions it first, and refers to it again in 

 connection with "Schloeribachia "fotirnieri, G-rossouvre, and "$.'' obesa, 

 Stolic/ka sp. In suture-line, as well as in other characters, this restricted 

 Prohauericeras differs both from the trueCeuomanian Schloeribachia and 

 from its own (Turonian) contemporaries among the Prionotropidae. On 

 the other hand, Pseudoschloeribachia is quite different again from any of 

 these developments. Its internal suture-line (Fig. B 5 and 6) is figured 

 for comparison with that of Schloenliackia varians (Fig. B 10) ; and 

 it will be seen that it differs very considerably, especially from that of 

 Hauericeras. As, however, more involute forms of Puzosia and other 

 Desmoceratids, including the keeled "P." stigata, Forbes sp., show, the 

 stretching out of the auxiliary elements may only be the result of 

 adaptation of a suture-line to wider sides, and the raising of the 

 umbilical portion is often found in younger developments. The suture- 

 line by itself thus is as unsatisfactory a character in many cases as, say, 

 the carination would be, if taken as the only basis for classification. 



* "Die Granulat. Kr. .1. AY. Miiusterland.," ' Zeit. D. Cleol. Ges.,' vol. Ivii 

 (1905), p. 20S, pi. viii, figs. 1 a and b. 



t Loc. cit. (1907), p. 165. 



J Loc. cit. (1902), p. 128, pi. ii, figs. .34 -38. Anderson (p. 63) also compared 

 AVhiteaves' " 8." propinqun with the Utatur form. 



See under Pseudophacoceras (p. 283). 



|| The name is no more unsuitable than is, e. g., Freeh's Paralytoceras for a 

 Devonian Clymenid. 



