2 ART. 2. H. YABE : CRETACEOUS 



YoKOYAMA,'^ who described and figured Cretaceous fossils, not only 

 of the Hokkaido, but also of other parts of Japan. This work was 

 indeed the first which treated systematically of the Cretaceous fauna 

 of the Hokkaido, but the nature and extent of the Cretaceous forma- 

 tion on that island was not known until the appearance of the publica- 

 tions of Prof. KoTORA JiMBO and his assistants who, for several years, 

 were occupied in the geological survey of the whole island. Jimbö^^ 



1) M. YoKOYÄMA: Versteinerungen aus der Japanischen Kreide. Palaeontograpliica. 

 Bd. XXXVI. 1890. The following species of Ammonites are described in this work: — 



rhyJloeeras Vcll.erlœ Michelin. 

 „ ezocnse Yokoyama. 



Ijijioceras Sacya FOBBES. 

 „ sp. 



„ sp. 



Ptychoceras pseudogauUinum Yokoyama. 

 AniaocercK suhqua/lraiuni YoKOYAMA. 

 „ Haradanuni Yokoyama. 



„ subundulaluin YoKOYAiMA. 



Anisoceras cfr. rugaium I'oRBES. 



„ sp. 



Desmoceras surjata Forbes. 



„ sp. 



„ Gardeni Baily. 



,, gaudama FoREES. 



Pachydiscu'^ ariyalurensis StoliczkA. 



„ Sutneri Yokoy'AMA. 



„ Naumanni Yokoyama. 



2) K. JiMBo ; Beiträge zur Keiintnii-s der Fauna der Kreideformation von Hokkaido. 

 Palœontologische Abhandlungen. Neue Folge, Bd. II. Heft 3. 1894. In this work, besides 

 Phylloceras Velledœ Mich., P. ezoënse Yok., H<tmi(es pi-eudogaidlinufi YoK., 77. Jlaradanus 

 YoK., IL cfr. rugatus Forbes, Pandiles sp., Scaphilcs cfr. aqvalia StAV., Pdchydisms ariyalnren^ia 

 Stol., p. Sutneri YoK. and P. Naumanni YoK., which are merely mentioned, the following 

 forms are described : — 



Lyfoceras Sacya FoRB. 



„ striatum JiMBÖ. 



„ crassicoslatun JiMBÖ. 



„ glahruin JiMBÖ. 



„ sphœronotum Jimbö. 



,, denffepUcatum Jimbö. 



,, erassuin JlMBÖ. 



Turrilites sp. 

 H'liiiiles ohstridua Jimbö. 



,, (juadrinodoKUs JiMBö. 



„ sp. 



„ sp. 



„ sp. 



» ^P- 

 sp. 



sp. 



„ sp. 



Placenticeras sid)lilistri(itum JiMBÖ. 



Acanthoceras rotomagense Defr. var. 



asiatica JlMBo. 

 ,, pseudodeverianvm Jimbö. 



0!coatephnniis sp. 

 Crioceras spinigerum JlMBô. 

 Scaph ten Yokoyamai JiMBÔ. 



„ ■pucrenhis Jimbö. 

 Holcodiscus Kotoi Jimbö. 

 Puchydiscus Haradai Jimbö. 



„ teshionensis Jimbö. 



„ subtilUoba.tus Jimbö. 



,, Yokoyamai Jimbö. 



„ Denisonianus Stol. 



Desmoceras Damesi JlBiEÖ. 



„ planulatiforme Jimbö. 



„ yïibarense Jimbö. 



„ Kaivanoi Jimbö. 



„ Jshikuivai Jimbö, 



