CEPHALOPODA FROM THE HOKKAIDO. 29 



jDarallel to one another, while near the umbilical margin, tlii-ee 

 or more of them unite to form a bundle. Besides, there are five 

 constrictions on the hist volution which are iDroader and deeper 

 than other intervals and are bordered behind Ijy a rib somewhat 

 more prominent than the usual ribs to which they are arranged 

 quite parallel. 



The suture line which is only partly seen, shows three saddles. 

 The first lateral saddle is narrow, but high and bipartite ; the 

 lobes are also bipartite. 



Of Anmionites described from the Cretaceous deposits of the 

 Pacific border, Olcostephanus Logannianus Whiteaves^^ from tlie 

 ■Chorizon of the Queen Charlotte Islands in some respects appears 

 nearest to this species. The periodic ribs seen on the Japanese 

 specimen are not present in the American species, and moreover 

 the whorls of the former increase as the shell grows more rapidly 

 than the latter. 



Locality : — The specimen here figured is from the Kami- 

 takambe, a right branch of the Ikushumbets, between the Poronai 

 and the Ikushumbets coal mines. 



Horizon : — Unknown. 



HAUERICERAS Grossouvre. 



The genus Hauericeras was established by A. de Grossouvre,^ 

 in 1893, to include Ammonites which have smooth, strongly 

 compressed, discoidal shells, with a sharp, ventral keel and having 

 the suture line composed of two broad saddles followed by 3-7 



ft 



1) Whiteaves: Mes, Foss. Vol. I., pt. 1, p. 27, text fig. ?>; pi. VIII., fig. 2. Pt. 3, p. 

 211, pi. XXIII., figs. 1 and la. Pt 4. p. 276. 



2) Grossouvke : Recherches sur la Craie supérieure. 1893. P. 219. 



