Davis — On the Fossil Fish of the Cretaceous Formations of Scandinavia. 395 



tooth, from the anterior extremity of the base of the root to the tip of the crown, 

 is 0"05 mm. The root has apparently an open and porous structure. 



These teeth present a considerable divergence from the usual characteristics 

 of the genus Oxyrhina in the long erect crown, and more especially in the wide 

 separation of the lateral extensions and the peculiar flat under-surface of the 

 root. It may at some time be found desirable to make it the type of a new 

 genus ; and it is not without hesitation that I have placed it as a distinct species 

 in the genus Oxyrhina. 



This species approaches in form to that of Oxyrhina grandis, Davis, from the 

 Cretaceo-Tertiary beds of New Zealand. It may be distinguished by its greater 

 length as compared with the width, its more erect and less triangular form, and 

 the presence of deep grooves extending vertically on the external, and, in most 

 cases, on the internal, surface. 



The teeth are abundant in the Faxekalk ; and numerous specimens from Faxe 

 are in both the Mineralogical and Zoological Museums of the University of 

 Copenhagen. Specimens from Saltholm also occur in each collection, and others 

 from Annetorp are in the former. 



Formation and Localities. — Etage Danien and Etage Sdnonien, in zones 1 and 2 : 

 Limhamn, in the District of Malm a ; Annetorp ; Faxe ; Kopinge, in the District 

 of Ystad ; Saltholm ; and Oppmanna, in the District of Kristianstad. 



Ex coll. — Riksmuseum, Stockholm ; Geological Museum, University of Lund ; 

 Mineralogical and Zoological Museums of the University of Copenhagen. 



Oxyrhina zippei, 

 Oxyrhina zippei, 

 Oxyrhina zippei, 

 Oxyrhina zippei, 

 Oxyrhina zippei, 



Oxyrhina zippei, Agassiz. 

 (PI. XL., figs. 1-7.). 



. Agassiz, L., 1843. " Poiss. Foss.," vol. iii. p. 284, 



pi. XXXVI., figs. 49—52 ; non fig. 48. 

 . PiCTET, F. J., 1845. " Paldontologie," vol. ii., 



p. 276. 

 . GiEBEL, C. G., 1848. "Fauna der Vorwelt," 



p. 357. 

 . Sauvage, H. E., 1872. " Bibl. Ecole Hautes 



Etudes," vol. v., No. 9, p. 23. 

 . Woodward, A. S., 1889. "Catalogue of the 



Fossil Fishes in the British Museum," pt. i., 



p. 392. 



Teeth acuminate, slender, compressed ; enamel smooth ; with or without 



TBANS. EOT. DDB. SOC, N.S. VOL. IV., PART VI. 3 L 



