Davis — On the Fossil Fish of the Cretaceous Formations of Scandinavia. 423 



support to the fin. Judging from a similar analogy, the anal fin occupied a 

 length much shorter than the dorsal, and was situated in close proximity to the 

 caudal fin. The caudal fin was probably large and powerful, the bases of strong 

 rays surrounding the extremity of the vertebral column affording evidence to that 

 extent, though the fin itself is absent. 



The front part of the body, with the head, is displaced, and this renders the 

 identification of this part of the fish obscure. The operculum on the left side has 

 been squeezed down, and with it the scapular bones supporting the pectoral fin. 

 The pectoral fin, originally occupying a lateral position, is represented on this 

 specimen depressed to a position on the ventral surface. It was large, and 

 apparently comj)osed of a large number of rays. A second fin is represented ; it 

 is of considerable size, and may be the ventral fin attached to the opposite side of 

 the body. 



The whole of the surface of the body is covered with scales ; they are thin, 

 closely overlapped, and of medium size ; a few scales on the ventral surface are 

 tolerably perfect ; the exposed part is 0-004 m. in height ; the posterior border is 

 circular, with a minute imbrication, determined with difficulty by a strong magni- 

 fier, along the margin ; the surface of the scale has a concentric arrangement of 

 striae, roughly parallel with the margin (fig. la). The anterior portion of the 

 scale is hidden beneath the posterior margins of the preceding scales. The 

 majority of the scales are crushed and imperfect. The vertebral column is 

 distinctly visible beneath the scales, especially the posterior part. It consisted of 

 about forty vertebrae, 0'05 m. in length; the height slightly exceeding the length 

 in the median part of the body ; nearer the tail the vertebrae are considerably 

 shorter. They are less constricted in the median part than are the vertebrae of 

 Hoplopteryx, and the articulating surfaces are supported by numerous buttresses, 

 extending from one to the other. To the vertebrae are attached strong haemal 

 and neural spines, which in turn afford support to inter-haemal and inter-neural 

 spines. These can be readily distinguished beneath the scales. The ribs are 

 comparatively long, reaching two-thirds the distance from the vertebrae to the 

 abdominal margin. 



This specimen is related to Berycopsis elegans, Dixon,* from the chalk of 

 Sussex. 



Formation and Locality. — Etage Danien (zone with Anancites sulcaius) : Saltholm 

 Limestone ; Linhamn, Scania. 



Fx coll. — Eiksmuseum, Stockholm. 



* "Geology and Fossils of Sussex," p. 372, pi. rxxv., fig. 8. 1850. 



