On Cretaceous Cephalopoda from Zululand. 



297 



P. westphalicum, Schliiter sp.,* and particularly the specimen figured 

 by Grossouvre.t are close to the present example in ornamentation 

 and general appearance, but the tubercles are coarser ; on the other 

 hand, in P. tridorsatuni, Schliiter sp., and P. monreii, Grossouvre, 

 costation is too fine and close. 



FIG. D. 1. Nortoniceras stangeri, Baily sp. jjUpper Senonian, Umtam- 

 vuna River, Natal. la. Specimen No. C19444, British Miiseum. 16. 

 No. C19443, comparable with Baily's co-type No. 11368A (Geol. Soc. Coll.). 

 Ic. No. C 19440 (penultimate septum of an example 340 mm. in diameter). 

 Figs. 1 a-c are after drawings by the late G. C. Crick. 2. Mortonu-eras 

 aff. wmkwelanense, Crick. Upper Senonian, Umkwelane Hill, Zululand. 

 (Specimen No. 5491.) (P. 234). All reduced to f. 



Since Mortoniceras stangeri, Baily sp., has tricarinate inner whorls, 

 and has, indeed, been included in Peroniceras by some writers; (e. g. 

 Kossmat), the external suture-lines of three examples, drawn by the 

 late Or. C. Crick, and the internal portion of another example, showing 



* Loc. cit. (1872), p. 45, pi. xiii, figs. 5 and 6. 



t Loc. cit. (1894), p. 98, pi. xii, figs. 1 and 4, a, b. 



t Loc. cit. (1876), pi. xli, figs. 3-5, ' Jiingst. Amm.' (1867), p. 26, pi. v, fig. 1. 



Loc. cit. (1894), p. 100, pi. xi, figs. 3 and 4. 



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