CEPHALOPODA FROM THE HOKKAIDO. 31 



the last volution which is marked by the characteristic sculpture 

 of the adult stage. When judged from the sculpture, the Japan- 

 ese form comes near to Gaudryceras glanegense Redtenbacher'^ 

 from the Gossan formation of the Alps which, with a somewhat 

 similar form and sculpture, shows a position intermediate between 

 this species and G. tcnuiliratum,. 



It is not yet possible to ascertain the exact relation between 

 the present form and G. striatum Jimbö sp. described below, 

 because the imperfect state of preservation of the former does not 

 allow the examination of its inner volutions which alone would 

 settle its relation to the latter. 



Localities : — The type specimen of Jimbö is from the Ekimo- 

 moanoro, a tributary of the Yûbarigawa, while the other is from a 

 cliflP of the Yûbarigawa, close to its junction with the Penkemo- 

 yübari. 



Horizon : — Pachydiscus-hQà^. 



GAUDRYCERAS STRIATUM Jimbö sp. 

 PL lY., fig. 5. 



1894. Lytoceras striatum Jimbö : 1. c. p. (181), PI. YI. 

 fig. 6 a, b. 



The type specimen, which has been described and figured in 

 the above paper, is a young individual of 4. 7 cm. in diameter 

 from the Abeshinai-rubeshibe, a tributary of the Teshiogaw'a. 

 Another less imperfect but somewhat larger specimen from the 

 same place has been lately found in the collection of Jjmbö 

 which necessitates the revision of the diagnosis given by him. 



1) Redtenbacher : I.e. p. 119, PI. XXVII. fig. 3. 



