NOTE ON CRIOCERAS A US TR ALE, MOORE 1 A LOWER 

 CRETACEOUS FOSS£L FROM QUEENSLAND. (1) 



By Felix Ratte, Ing. Arts et Manuf., Paris. 



(Plates I. and II.) 



This fossil, one of the largest of the Cephalopods, seems to 1 >e 

 identical with the species described in the above paper, by Mr. 

 Chas. Moore, in the Quarterly Journal of the Geological Society, 

 under the title, " On Australian Mesozoic Geology and Paleon- 

 tology, etc." 



A part only of the fossil is represented by a reduced figure and 

 the shape of the septa has not been recorded, in Moore's paper. 



The present paper is accompanied by a drawing of the septa 

 (PI. 1), on a scale of about f , from a large specimen in the Austra- 

 lian Museum. 



The difficulty of drawing the septa in ammonites and allied 

 fossils, arises from the fact that, although the testa only may have 

 been removed in some places showing its intersection with the septa, 

 in other places the abrasion has removed a deeper layer, and also 

 the ultimate sub-divisions of the septa, leaving a broader and more 

 simple intersection. Moreover, the ramifications of one septum come 

 so close to the next, and apparently intermix so much with it, 

 that it is temporarily lost. This explains why slight additions of 

 an approximative character have been necessary to complete the 

 figure. 



(1) Quarterly Jour. Geol. Soc, May 1879, pi. XV., fig. 3. 



