CLASS V 



CEPHALOPODA 



635 



Subfamily C. Carnitinae Arthaber. 



Form and sculptiu-e like that of the Sageceratinae, except that in the Carnitinae 

 there is a tendency towards the development of ribs and knots. The septa are no 



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j/ 



Fit,, iiyi. 



Pseudosageceras intermontanum H. and S. 

 Lower Trias ; Idaho, x '^U- 



Fig. 1192. 



Sageceras haidirujeri (Hauer). Upper Trias ; 

 Hallstadt, Austria. 



Fni. 1103. 



Septa of A rihaberites alexandrac Diener. Middle 

 Trias ; Alps (after von Arthaber). 



longer lanceolate, but ceratitic or even largely digitate. The adventitious series of 

 lol)es is short, but usually highly complex. This 

 group probably serves as a connecting link be- 

 tween the Sageceratinae and the Pinacoceratinae. 



Garnites Mojs. ; Procarnites Art. ; Arthaberites 

 Diener (Fig. 1193); Lanceolites Hyatt and Smith; 

 Hauerites and Bambanagites Mojs.; Bosnites Hauer; 

 Tibetites Mojs. Trias. 



Sul)faniily D. Pinacoceratinae Mojsisovics. 



Forms thin, compressed, with acute venters. 

 Lobes and saddles all finely digitate. Adventitious 

 and auxiliary lobes numerous. 



The Pinacoceratinae reach the highest degree 

 of complication of the septa found in any group 

 of Ammonites. The general plan of their septa 

 suggests a derivation from the Carnitinae, and 

 through them from either Hedenstroeminae or 



Sageceratinae. 



It is also possible that the sub- 



Fio. 1104. 



Plnacoceraf: layer!, (Hauer). Upper Trias ; 

 Rothelstein, near Aussee, Austria. 



