Davis — On the Fossil Fish of the Cretaceous Formations of Scandinavia. 401 



This species, instituted for the reception of teeth from the Cretaceo-Tertiarv 

 strata of New Zealand, is now found to occur in the Cretaceous system of Sweden. 

 The teeth from the latter locaHty are, however, smaller than the type specimens 

 from New Zealand. In addition to the examples sent from the museums in New 

 Zealand, several specimens are recorded by Mr. A. Smith Woodward which are 

 in the collections at the British (Natural History) Museum, all from localities in 

 New Zealand. 



A small number of teeth have been obtained from the Faxe limestone at 

 Annetorp, and are included in the Lund collections. From Oppmanna the 

 number of examples is much larger ; and it is from this locality that the types 

 have been selected which are represented on Plate xl. There is no appreciable 

 difference, however, iw the teeth from the two formations. 



Numerous specimens are comprised in the Danish Collections, principally 

 derived from the Saltholmkalk. 



Formation and Localities. — Etage Danien : Faxe Limestone : Annetorp ; Salt- 

 holm ; Luneberg ; Limhamn, Skane ; Faxe. Etage S^nonien II. : Oppmanna ; 

 Sisseback. Etage S^nonien I. : Kjuge. 



Ex coll. — Geological Museum, Lund University ; Riksmuseum, Stockholm (Sisse- 

 bach) ; and Limhamn Mineralogical and Greological Museums of the University 

 of Copenhagen. 



Genus. Otodus. Agassiz, 1843. " Rech. sur les Poissons Fossiles," vol. iii., 



p. 266. 



This genus is defined by Agassiz as occupying an intermediate position 

 between Carcharodon and Lamna or Oxyrhina. It may be distinguished from 

 Oxyrhina by the presence of a well-defined lateral denticle on each side the 

 median cone, more frequently rounded than compressed or pointed. The median 

 cone is broad and compressed ; similar in form to that of Oxyrhina. In Lamna 

 and Odontaspis the lateral denticles are smaller, more cylindi-ical and pointed, 

 and the teeth generally more elongated. Tlie absence of marginal serrations 

 serve to distinguish this genus from Carcharodon. The root is largely de- 

 veloped and thick, but is devoid of the deep lateral projection which distinguishes 

 Lamna. 



This genus is found abundantly in the Cretaceous and Tertiary formations, 

 but, so far as known, has since ceased to exist. 



