CEPHALOrODA FJIOM TJIK HOKKAIIX». 



45 



is for tilt; timo being conipellcd to treat the two as specilically 

 di.stuict, UH has akeady been done l)y Jimbö. 



It is necessary to make a fe\v remarks on the inteiiial 

 suture luie of T. glahriis whieh was not figured by Jimbö. It 

 sliows two saddles and the corresponding kjbes. Tlie antisi[)honal 

 and the lateral lobes are narrow and deep ; the two saddles are 

 also slender and of equal height, the inner ending bifid and the 

 outer simple. 



The above characters of the internal IoIjcs and saddles, toge- 

 ther with those of the external part of the suture line, are exactly 

 what we lind in the type of T'elragoniics and especially in T. 

 epi(jonn8 which also shows two internal saddles. 



Localities : — The upper course of the Ikushumbets, and the 

 Yrd)arigawa, Ixjth in the Province of Ishikari; the 8aushi-sanushibe, 

 a tributary of the Popets in the Prov. Iburi ; the Opiraushibets and 

 the Ijranches of its u})per c(jurse, iu the Prov. Teshio. JNIany 

 specimens fiom all the localities meutioned. 



Horizon : — Upper xVmmonite-ljcds. 



TETRAGONITES SPHAERONOTUS Jjmüö sp. 

 PI. YIL, iigs. I a, 1). 



1894. Lytoccras sphaeronotuui J im no : 1. c. p. oo (181), PI. 



VI. (XXII.), ligs. 3, 3a. 

 Dimensions : — 



Dianit'ter. 



lloiglil of tlie lawl wliorl. 

 Breadtli of tlie last wliorl. 

 ^VillLll of iiiuliilieii--. 



loo. 



47. 



54. 

 'JO. 



