On Cretaceous Cephalopoda from Zululainl . 229 



P. arrialoorensis, Stoliczka,* is very close to the Zululand example 

 in shape, umbilicus and number of costae but differs in the character 

 of the periphery, unless this difference, well seen on comparing 

 fig. 1 c of Grossouvre's pi. v with fig. 3 a of Stoliczka's pi. Ixiii, is due to 

 the presence of the shell in the Indian form, which seems doubtful 

 in view of its sandy matrix. However, the larger and somewhat 

 different example figured by Yokoyamat shows distinct and sinuous 

 costatiou on the ventral area both of the cast and of the shell. The 

 suture-line of the Indian species also is simpler than that of the example 

 here described. 



P. colligatus has been recorded from Tullear, on the West Coast of 

 Madagascar, and other species of " PacJiy discus," including Jacobites 

 from other parts of the island. Woods stated that Pacliy discus 

 was absent in Poudoland ; but there are four specimens from the 

 Umtamvuua River in the British Museum, || including two large 

 examples that may belong to forms of the colli gat us -group. The 

 presence of " Pacliy discus " both in Pondolaud and in Zululand thus 

 forms a further point of resemblance with the Indo-Malgascan fauna. 

 . Umkwelane Hill. Coll. Dr. A. L. du Toit. 



3. PARAPACHYDISCUS cf. WITTEKINDI, Schliiter, sp. 

 (PL XXIV, fig. 1.) 



1872. Am. robustus, Schliiter, "Ceph. d. Ob. Deutsch. Kreide,' 1 Palaeon- 



togr., vol. xxi, p. 67, pi. xxi, figs. 5 and 6, pi. xxii, figs. 1-3. 

 1876. Am. ivittekindi, Schliiter (ibid.), vol. xxiv, p. 40 (160). 



* In Blant'ord and Stoliczka, " Foss. Ceph., Cret. Rocks of S. India," ' Mem. 

 Greol. Surv., India, Pal. Indica ' (1865), p. 126, pi. Ixiii, fig. 3 only. 



t Loc. cit. (1890), i, p. 186, pi. xxi. 



J See Boiile and Thevenin, ' Bull. Soc. Geol. France,' ser. iv, vol. iii, 1903, 

 p. 436; Boiile, Lemoiiie and Thevenin, loc. cit. (1907), pp. 23-25; Kilian and 

 Eeboul : " Les Ceph. Neocret. d. lies Seymour et Snow-Hill," ' Wiss. Erg. 

 Schwed. S. Pol. Exp. 1901-03,' III, 6 (1909), p. 25. 



Loc. cit. (1906), p. 346. 



|| Two of these, named P. umtafunensis by Crick (MS.), Nos. C19434-5, and 

 compared with P. tweenianus, Stoliczka (loc. cit., 1865, p. 107, pi. Iv only), one 

 of the species found in Madagascar, are evolute, like P. conduciensis, Choffat, 

 and with comparatively simple suture-line, thus differing from the typical 

 Parapacliy discus. They are similar to certain South- American " Pachy discus " 

 (Paulcke "Die Ceph. d. Ob. Kreide Siidpatagoniens," 'Ber. Naturf. Ges. Freiburg 

 i. B.,' vol. xv (1907), e. y. pi. xix [x]). The other two gigantic specimens, not 

 described by Crick, may belong to Parapachy discus of the colligatus-supremus 

 type, but one has an umbilicus of 19 per cent, and a thickness of 45 per cent, of 

 the diameter, the other at a whorl-height of 260 mm. a thickness of 200 mm. ; 

 both are more compressed than the Zululand specimens here described, and 

 intermediate in sectional outline between figs. 30 (P. colligatus) and 31 (P. 

 oldhami) in Nowak (loc. cit., 1913, pi. xliii). 



