38 AET. 2. — H. Y ABE : CRETACEOUS 



Beudanti, giving the Characters which distinguish it from P. 

 Stoliczhai Kossmat of Southern India. However, he diifers from 

 KossMAT in one })oint ; viz. in referring his species not tO' 

 Desmoseras, but to Puzosia, in which respect the present writer 

 is more inclined to adopt the opinion of Kossmat. 



The reason why the present writer hesitates to bring this 

 species under Democeras is because its suture line is only im- 

 perfectly known. Kossmat who examined the Canadian specimen^ 

 thinks that it has a typical Desmoceras suture as he says " mit 

 ganz typischer zur Naht gehender Lo1)enlinie." A part of the 

 suture line seen on a Japanese specimen gives no clue to dis- 

 tinguish it from Desmoceras. On the other hand, the suture 

 line on pi. XXVI in the White ayes' monograph which does 

 not appear to be very satisfactorily drawn, shows in some respects 

 a resemblance to that of Cleoniceras,^' a genus proposed by Parona 

 and Bonarelli to include Amm. Qeo7i. d'ORB., formerly as- 

 signed to Sonneratia, Amm. Bevdanti and a few other allied 

 forms. Such being the case, it is quite impossil)le at present to 

 determine whether this species is Desmoceras or Gleoniceras. 



Desmoceras Dawsoni shows also a distant relation to Desmo- 

 ceras voyi Anderson"'^ from the Horsetown beds of California. The 

 latter possesses, however, a broader and somewhat inflated shell with 

 lateral sides gently converging to the ventral surface, and although 

 the periodic ribs are of the same nature as those of Desmoceras 

 Dawsoni, yet they are fewer in number. The suture line is described 

 as agreeing wâth that of Desmoceras lai'idorsatum Michelin."^' 



1) Parona e Bonarellt : Fossili albiani d'Escragnolles, p. 85 foS"». 189(). 



2) Anderson: Cret. J)ep. Pacific coast, p. 100, pi. III., figs. 89, •)(). 1902. 



o) D'Orbigny: I.e. p. 270, p1. LXXX.— Pictet : Foss. d. (h-es. Yerts. p. 44, pi. III., 

 figs. 4, 5.— SxoLiczkA : I.e. p. 14.s, pi. LXXIV., figs. 1-4.— Kossmat : I.e. p. 107 (172), pi. 

 XIX (XXY), figs. 2-5. 



