by L. F. Spath. 41 



Genus GAUDRYCERAS, Grossouvre. 



2. — Gaudryceras, sp. juv. 



An immature, completely septate specimen, of a diameter of 21 mm., 

 resembles the Antarctic example of G. politissimum, Kossmat, figured 

 by Kilian & Reboul 1 , but no definite specific determination of the 

 present specimen is attempted. It may, possibly, be the young of 

 G. amapondense, van Hoepen 2 , or of G. cinctum, Crick MS. 3 from the 

 same beds, though the latter has its striation drawn forward very 

 strongly on the periphery. In these forms, and in G. varagurense, 

 var. patagonicmn, Paulcke 4 , the striation, also, is somewhat coarser, 

 whereas the present example, in the fineness of its ornament, resembles 

 Japanese specimens of G. tenuiliratum, Yabe, in the British Museum. 

 This latter form, however, is more evolute, as also are G. pulchrum, 

 Crick, 5 and G. kayei (Forbes). The suture-line is of the type of those 

 of the Indian forms figured by Kossmat. 6 



The specimen shows considerable resembance to G. sacya (Forbes) 

 that, according to Kossmat, occurs in the Lower Utatur group (Albian) 

 but the holotype of which is associated with G. buddha, 7 Parapuzosia 

 gaudama and Hauericeras 1 sugata, all preserved in the same yellowish 

 gritty sandstone. Forbe's original of A. sacya has a less depressed 

 whorl-section than the specimen here described, the whorl-height and 

 thickness being 37%, at the diameter of 32 5 mm., whereas in the 

 present example the ratio of H. : Th. = 37 : 42. The inner whorls 

 of G. sacya also seem to be more loosely coiled ; on the other hand, 



1 Loc. cit. (1909), p. 14, pi. I, figs. 7 & 8. 



2 Loc. cit. (1920), p. 143, pi. XXIV, figs. 4 & 5. 



3 B. M. No. C 19415. Resembling G. mite (Hauer). 



4 Loc. cit. (1905), p. 6, pi. XVII (VIII), figs 1 & 2. 



5 " Ceph. Trib. Manuan Creek, Zululand," Cret. Foss. Natal, III, 2, Third 

 Eeport, Geol. Surv. Nat. & Zulul. 1907, p. 237, pi. XV, fig. 1. 



6 " Unters. Sudind. Kreidef .", I, Beitr. Pal. Ost.-Ung. Vol. IX, 1895, pi. XV, 

 e.g. figs. 6c, 7c. 



7 This is a compressed form, comparable with Stoliczka's fig. 7 of pi. lxxv, 

 not with the, more inflated varieties : fig. 6, pi. lxxv, or fig. 3, pi. lxxvi. 

 Forbes' s holotype (B.M. No. 10484, Geol. Soc. Coll.) has the inner whorls very 

 badly preserved, in crystalline calcite, so that exact comparison with G. sacya 

 is difficult; but Stoliczka's fig. 5, pi. lxxv, seems to be somewhat like these 

 slender inner whorls of G. buddha. If the various forms of this group are to be 

 included in one species, A. buddha has priority, as Whiteaves (Mesoz. Foss. I, 

 IV, 1900, p. 271) has pointed out. 



