24 ART. 2. H. YABE : CRETACEOUS 



G. denmanense Whiteaves^^ sliows phases of growth similar 

 to those of G. tenuiliratum. Its adult stage is provided with a 

 single kind of ribs which are somewhat thicker and separated by 

 wider intervals than in Japanese species. 



G. glanegense Redtenbacher^^ from the Gossan formation of 

 the Alps also more or less closely resembles the Japanese species, 

 showing surface marking intermediate between it and G. dense- 

 plicatum Jimbö sp. 



Localities : — Abundant wherever the Pachydiscus-and the 

 Scaphites-heds occur, but especially frequent in the Fachy discus 

 beds. Found in Sorachigori and Yübarigöri in the Province of 

 Ishikari ; Yûfutsugun in the Province of Iburi ; along the 

 Opiraushibets, and the Abeshinai, a tributary of the Teshiogawa, 

 in the Province Teshio ; Urakawa, in the Province of Hidaka ; 

 Sôyagori, in the Province of Kitami. Outside of the Hokkaido, 

 this species has been also found in the Cretaceous of Amakusa.^^ 



I. Variety with a Wider Umbilicus. 

 Var. ORNATA m. 



PI. IIP, figs. 2 a, b. 



Compare : — 



1865. Ammonites Kayei Stoliczka: 1. c. p. 15, PI. LXXVII. 



fig. 1. 

 1871. Ammonites Kayei Griesbach : Geology of Natal. 



Quart. Journ. Geol. Soc. London. Vol. XXVII. p. 63. 



1) Whiteaves: On Some Fossils from the Nanaimo Group of the Vancouver Creta- 

 ceous, p. 129, PI. II. figs. 1-2. 



2) Redtenbacher : 1. c. p. 119, PI. XXVIL figs. 3 a, b. 



3) H. Yabe: Note on Three Upper Cretaceous Ammonites from Japan. P. 10, 



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