408 Davis — On the Fossil Fish of the Cretaceous Formations of Scandinavia. 



from the base of the crown ; the under surface is deeply concave, the lateral 

 prongs extending and forming deep projections. 



This tooth is indistinguishable from the teeth of Otodus obliquus, Ag., of the Red 

 Crag of the Eastern Counties of England ; and although not previously recorded 

 from measures lower than the Tertiaries, there appears no alternative but to 

 place it with this species. Its nearest relation amongst the Scandinavian fishes is 

 with Otodus appendiculatus, Agass. ; but from that species it is distinguished by the 

 thickness and rounded form of the crown, and by the great inner extension of the 

 root. 



Formation and Locality. — Kridt formation : Rugaard, v. Grenaa, Jutland. 



Ex coll. — Zoological Museum, University of Copenhagen. 



VEETEBE^ OP OTODUS. 

 (PI. XL., figs. 25, 26, 27; pi. xlii., figs. 1, 2, 21.) 



Vertebrae of this genus occur with considerable frequency ; they vary in size, 

 and probably belonged to more than one species. The larger examples measure 

 0'055 m. in diameter, and the smaller ones O'OlSm. The internal structure 

 possesses the characteristics represented by Professor Carl Hasse * in the 

 Plagiostomi asterospondyli, the calcifications between the anterior and posterior 

 concave surfaces assuming a radiating or star-like arrangement in vertical section. 

 The vertebrse of Otodus are classed with Ginglymostoma and Crossorhinus in the 

 Scylliolamnidae. 



Formation and Locality. — Etage Danien : Faxe. Etage S^nonien : Kopinge, 

 Ignaberga. 



Ex coll. — Zoological Museum, University of Copenhagen ; Geological Museum, 

 University of Lund. 



SEEIES OF SMALL VEETEBE^E. 

 (PL XL., figs. 28-32.) 



A number of vertebrae occur in the collection from the Riksmuseum at Stock- 

 holm which have been found in the Chalk beds at Kopinge. Tliey are in some 

 instances beautifully preserved, and probably belong to some of the smaller 

 genera of Lamnidse. 



Formation and Locality. — Etage Sdnonien (zone with Bele7nnites mucronatus): 

 Kopinge, in the district of Ystad. 



Ex coll. — Riksmuseum, Stockholm. 



* " Das natiirlichc System der Elasmotrancliier auf Grundlage des Baues und der Entwicklung ihrer 

 Wiibclsaule," p. 209, pi. xxvn., figs. 26, 39, 40. 1 882. 



