22 ART. 2. H. YABE : CRETACEOUS 



some specimens of the Japanese species were also sent for com- 

 parison, the Californian form is said never to attain snch a lai'ge 

 size, and to be less involute. This is the more remarkable, as 

 the specimens sent to him were all of a young stage. Now, as 

 shown by the descriptions of the varieties of this species, the invo- 

 lution of whorls is also not always constant, therefore it seems 

 to the writer that the distinction based on this character is not 

 of much value. G. voragurense Kossmat^^ from the Trichinopoly 

 group of South India is also one of the nearest allies, but it 

 possesses a more compressed shell and higher whorls. 



The middle stage'': — Whorls rather rapidly growing in height 

 and breadth ; the height and breadth being at first nearly equal, 

 while later the height becomes greater than the breadth. Umbili- 

 cal wall very steeply inclined. 



Surface with striœ and ribs, the shortest strite disappearing 

 imperceptibly as the shell grows, while the remaining ones, on 

 the contrary, become thicker and more elevated and separated by 

 wider intervals than on the whorls of the yonng stage. Ribs very 

 numerous, with seven or eight striie between, somewhat elevated, 

 round, composed of two or three strite which are very close to- 

 gether and run into one on the lateral side. Involution also 

 somewhat deeper, aljout one half of the preceding volution being- 

 covered. 



Suture line as in the preceding stage with some slight compli- 

 cations. 



G. mite Hauer''^ and G. varagurense Kossmat in form 

 closely resemble this stage. The first species which is from the 



1) Kossmat: 1. c. p. 26 (122), PI. IV (XYJII), figs. 2a, b, c; PI. Ill (XVII), fig. 9. 



2) Yokoyama: 1. c. PI. XVIII. figs. 12 a, b. 



.".) Haueu: 1. c. p. 7 (o05), PL II. figs. 3-4. A. de Geos^ouvee: 1. c. p. 227, PI. XXVI. 

 fig. 4 ; PI. XXXIX. 



