264 Annals of tJifl South African 



GEN. CYMATOCERAS, Hyatt. 

 25. CTMATOCERAS ? sp. juv. cf. VALUDAYURENSE, Blanford sp. 



1861. Nautilus valudayurensis, Blanford. Cret. Fauiia S. India (Pal. 



Indica), vol. i, " Cephalop.," p. 23, pi. xii, figs. 2-3. 

 1866. Nautilus valudayurensis, Stoliczka, ibid., p. 206. 



A small and fragmentary specimen (No. 5469), consisting of the 

 casts of four camerae in a very good state of preservation, agrees with 

 Blanford's figures, especially in the outline of the sectional view 

 (fig. 3), in position of the siphunele (centrodorsan), and the presence 

 of a small annular lobe. The decussate ornament figured in 2 b also 

 is well shown in the dorsal impression, but on the outer whorl only 

 striae of growth are visible, not the coarse folds typical of Cymatoceras. 

 On the other hand, the presence of the linguiform annular lobe shows 

 the specimen to be distinct from Eutr&pJinceras,* some examples of 

 which (e. g. E. dekayi (Morton), var. montanaense, Meekf) agree with 

 it in whorl-section Of the various forms included by Speugler^ in 

 Nautilus [Cymatoceras'] aft', atlas, Whiteaves, the small ammonite 

 figured by Blauford somewhat resembles the fragment here de- 

 scribed, but the siphunele is ventrocentrau in the Indian specimen, not 

 centrodorsan. 



The small Nautilus sp. described by Crick jj has a similar septal 

 surface, with annular lobe, but a more depressed section, and probably 

 is of Albian age, as also is Cymatoceras manuanense, Crick sp.^f The 

 large examples of this species .have no annular lobe, but agree iu 

 section and position of siphuucle. 



Locality. Umkwelane Hill, Umfolozi, Zululaud. Coll. Dr. A. L. 

 du Toit. 



OBSERVATIONS ON THE UMKWELANE HILL FAUNA. 

 To the Cephalopoda from Umkwelane Hill, described iu the fore- 

 going pages, must be added three Ammonoids recorded by Etheridge, 

 namely : 



Placenticeras Tcaffrariwm, Etheridge. 



umkwelanense, Etheridge. 



Diplomoceras ? cf. large-sulcatum, Forbes sp. 



* Hyatt, "Phylogeny of an Aeqxiired Characteristic," ' Proc. Am. Philos. 

 Soc.,' xxxii, No. 143, 1894, appendix, p. 555. 

 f Loc. cit. (1876), p. 498, pi. xxvii, figs. 2-2 f. 

 J Loc. cit. (1910), p. 135. 

 Loc. cit. (1861), pi. viii, fig. 4. 

 || Loc. cit. (1907), p. 248, B.M., No. C18310. 

 H Ibid., p. 243, pi. xv, fig. 6, B.M., Nos, C18282-5. 



