194 



ribs become gradually broader and less elevated; they are also 

 further apart than on the preceding whorls. 



It has to some extent been 

 J/^, r^flyx possible to develop out the 



S^ ^<^ и ^Zd. oSVh suture-lines on one of the 

 ^ ^ №. '^^ V specimens. These are deeply 



^ V ]r ^ divided, as is shown in the 



figure. The external saddle is 



Fig. 2. Suture-line of Cadoeeras high and narrow; the first su- 



crassum nov. sp. • i i i jji • u j 



^ perior lateral saddle is broader 



and somewhat lower than the external saddle. The inferior 



lateral saddle is situated at the angle formed by the side and 



the inner margin; it also is comparatively broad and lower 



than the superior lateral. The nature of the suture-line proves 



that this Ammonite belongs to the genus Cadoeeras. 



Of all the Ammonites that have been hitherto described, 

 these Greenland ones are related most nearly to Cadoeeras 

 sublœve, Desl. ^) and Cadoeeras Elatmœ, INikitin^). 



They difl'er from the first in that the whorls are propor- 

 tionately higher and narrower, the umbilicus is wider and the 

 ribs are smaller and closer together. 



The chief difference between the Greenland specimens and 

 Cadoeeras Elatmœ is seen in the wider umbilicus of the former ; 

 further, the umbilical border is much more rounded, the ribs 

 are finer and do not curve forward so much, also they remain 

 distinct further forward in the Greenland specimens than is the 

 case in the species Cadoeeras Elatmœ. 



Another large Ammonite-fragment was found also in Varde- 

 klöft, which differs from the six specimens mentioned above in 



') Eudes-Deslongchamps, E. 1889. Rapport sur les fossiles oxfordien de 

 la collection Jarrt. Bull. Soc. Linnéenne de Normandie, sér. 3, vol. X, 

 separat p. 26, tab. 1, fig. 1—4. 



^) NiKiTiN, S. 1881. Der Jura der Umgegend von Elatma. Lieferung I, 

 p. 34, tab. IV, fig. 20, 21, 23, 18? Lieferung 2, p. 14, tab. X, fig. 47. 



