'276 Annals of tJie South African Museum. 



These figures indicate that with increase in size, the umbilicus 

 becomes narrower, whereas the Indian examples appear to be more 

 involute in the young. The inner whorls of the present example are 

 smooth, as are Stoliczka's specimens ; but on the periphery of the 

 outer whorl costation appears, between the numerous sulci, as in 

 P. compressa, Kossmat.* A further point of difference is the slight 

 flattening of the sides in the Zululaud example, combined with a 

 wider venter, making the whorl-section more rectangular than that of 

 Stoliczka's larger example (fig. 3 rt), ;'. e. more like that of his fig. 2 a. 

 The umbilical slope, also, is inclined, not perpendicular, or even 

 overhanging, as in Stoliczka's species, and agrees with that of Crick's 

 specimen. 



The constrictions, however, are very similar to those of Kossmat's 

 species, and it may be recalled that Crick already had described his 

 example as being slightly more compressed than Stoliczka's fig. 3 a. 

 The False Bay example also has, at a diameter of 82 mm., practically 

 the same dimensions as the larger specimen here described. t 



Etheridge* figured a very large " Desinoceras sp." from the Albian 

 of the Umsinene River, in the neighbourhood of the Manuau Creek, 

 and thought it possibly allied to the " Ootatur form of D. beudanti 

 (Brongniart) " = P. stoliczkai, Kossmat, 1898. The presence of cos- 

 tation might suggest that it is a large example of the form here 

 described, in which ribbing appears near the end ; but the constrictions 

 appear to be quite different, and it is probable that Etheridge's form 

 is related to the forms of the planulata-gronp, with straight constric- 

 tions, found in Angola. 



Puzosia of the insculpta-bhima group, referred to above, have a 

 different course of the constrictions, and, the costate plamilata group 

 is too evolute. The reference of the present form to Ulilujella, after 

 Jacob, the author of the genus, appears somewhat doubtful. 



Locality. Middle Branch, Manuau Creek. Coll. W. J. Wybergh. 



= A. durga, Stoliczka, non Forbes, loc. cit., pi. Ixxi, fig. 7. 



f A specimen, not noticed by Crick in his paper, but labelled by him / Beudan- 

 ticeras beiidanti, Brongniart sp. (B.M., No. C18303). is identical with the form 

 here described, and Hauericeras sp. (recorded on p. 243), together with a second 

 Hauericeras ? sp., not mentioned in the paper (B.M., Nos. C18276-77)> 

 probably also belong here. 



t "Cret. Foss. Natal," II, 'Third Eeport Geol. Surv. Nat. and Zulul./ 

 1907, p. 88, pi. vi. 



