28 ART. 2. H. YABE : CRETACEOUS 



one third of the inner volution being visible ; the aperture is 

 nearly round ; the strite on the surface are coarser. 



The suture line iô the same in both. 



This variety differs from G. madras'patanimib^ Blanford sp. 

 from the lower Utatur group of South India in its coarser striie ; 

 but in form they are remarkably alike. 



Lytoceras sp. (Yokoyama : 1. c. p. 80, PI. XIX. fig. 3 a, b.) 

 may probably be referred to this variety, as it agrees quite well 

 in form and sculpture ; periodic ribs are very indistinct in this 

 and the next variety, being almost invisible in some specimens, 

 although more distinct in exceptionally well preserved ones. 



A specimen from the Hokkaido in the Imperial Museum of 

 Natural History in Berlin was considered by Jimbö, to be a 

 variety of G. denseplicaium. But the examination of a plaster- 

 cast kindly sent to the writer by O. Jjeckel, the director, shows 

 that it really belongs to lliis variety of G. tenuiliratum. 



Localities : — The YCibarigawa, above the mouth of the 

 Panke-moyübari ; the Ikushumbets ; the Sanushibe, a tributary 

 of the Popets. Five specimens were examined. 



Horizon : — Upper Ammonite-beds. Exclusively in the 

 Fachydiscus-hed^ ? 



Var. INFREQÜENS m. 

 PI. IV., fig. 3 a, b. 



1894. Lytoceras Saeya Jimbö (par.) : 1. c. p. 34 (180). 



Dimensions : — 



Diameter. 4.30 cm. 100.' 



Height of the last whorl. 1.7Ö „ 40. 



1) SïOLiczKA: I.e. p. 151, PI. LXXV. fig. 2.— Kossmat : I.e. p. 32 (128). 



