Plate VI. 



Gaudryceras Yol:oyamai m. Pp. 36-38. 



Fio-. ]. a and ]), side and front views of the type in the Sei. CdII. Mus. 



From njiper Aninionite-lieds of tho Yilharigawa, Prov. Tsliilcari. 



Xat. size. 

 Fig. 2. n, side view ; h, front view, of a younger specimen in tlie Rci. Coll. 



Mus. From upper Amnion ite-l)eds of the Yfibarigawa, Prov. Ishi- 



kari. Nat. size. 



Gaudryceras limatnm m. Pp. 34-3(). 



Fig. 3. a, side view, somewhat restored ; b, front view, of the tyi)e in tlie 

 Sei. Coll. ]Miis. From u]iper Ainmointe-beds of the Yoshiasliizawa, 

 a tributary of tlie Ikushumlx'ts, Prov. Ishilcari. Nat. size. 



