On Cretaceous Cephalopoda from Zululand. 231 



and the costae of the secondary ornament (if the large and thin 

 examples belong to the same species) are too pronounced on the 

 venter. P. seppenradensis, Landois,* which was compared with P. 

 wittekindi (and Pachydiscus /r/r/x/V//s/x) by Zittel, retains its costation 

 to a very large diameter, but apparently belongs to the true Pachydiscus 

 of the peramplus group, with comparatively simple suture-line. 



P. lei-yi, Grossouvre sp.,t probably is a close ally of the Zululand 

 form, but has pronounced umbilical tubercles instead of mere swellings 

 of the primary ribs, as indicated in Schliiter's fig. 5 of pi. xxi. 



The large forms of Pardpachydiscus from Pondoland, referred to 

 under P. sp. nov. cf. colligatns, are more compressed than the present 

 example. 



The suture-line of P. witteJcindi is less complex than that of the 

 Zululand form, which resembles in this respect the suture-line of 

 P. iiniriijultiae (Philippi), Steimnann sp., especially in the straight 

 line formed by the main stem of the principal lobe. The distance of 

 this line from the parallel siphonal line is 95 mm. There is a slight 

 groove on the periphery, marking the position of the siphuncle, as in 

 P. colliyatus. 



The comparison of this species with P. wittekindi cannot be taken to 

 indicate affinity with the European fauna, for they certainly are not 

 specifically identical, and the present form is attached to Schliiter's 

 species only because of Indo-Pacific species, that may be more nearly 

 related, corresponding large stages are unknown, so that comparison 

 is difficult. 



Locality. Umfolozi River, East of Railway. Coll. Mr. Illiugworth. 



4. PARAPACHYDISCUS, sp. iud. 



Portions of a gigantic specimen (4985), at least half as large again 

 as the example last described, and therefore probably of a diameter 

 of about 600 mm., differ slightly from this other large specimen 

 (No. 3969) in the suture-line. Only the peripheral portions of two 

 camerae, including the greater part of the external saddles, are preserved ; 

 the median saddle in the ventral lobe alone is 46 mm. wide. The 

 details of the ventral lobe differ somewhat from those shown in the 

 peripheral aspect of P. colligatus, Binkhorst in Grossouvre (with 

 which the small example (No. 5489) shows good agreement). 



* " Die Eiesen-Amrn. v. Seppenrade," 23. Jahresb., ' Westfal. Prov.-Ver. f. 

 Wiss. and Kunst.,' 1895, p. 104, pis. i and ii. 

 t Loc. cit. (1894), p. 178, pi. xxi. 

 I Loc. cit. (1895), text-fig. 5, p. 77. 

 Loc. cit. (1908), pi. vi, fig. la. 



