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



Seapanorhynchus latus, Davis. 

 (PI. XXXVIII., figs. 14-17.) 



Teetli broad in proportion to the height ; outer coronal surface smooth, 

 slightly convex, with a v^ide median sulcus at the base ; the lower fourth of 

 the height of the crown expands rapidly in breadth. Inner surface smooth and 

 convex. A jjair of lateral denticles attached to the broad base of the crown. 

 Root thinner, antero-posteriorly, and the lateral bifurcations longer and deeper 

 than in Seapanorhynchus tenuis from the same horizon. It also differs from the 

 latter in the absence of grooves on the inner coronal surface ; by its less rounded 

 and attenuated form ; and in the larger size and greater prominence of the 

 lateral denticles. 



This species is represented by examples from Annetorp in Sweden, in the 

 Mineralogical Museum of the University of Copenhagen, kindly placed at my 

 disposal by Prof. Johnstrup. 



Formation and Locality — Etage Danien : Oretorp ; Annetorp. 



Ex coll. — Riksmuseum, Stockholm; Mineralogical Museum, Copenhagen. 



Seapanorhynchus gracilis, Davis. 

 (PI. XXXVIII., figs. 18-20.) 



Teeth, median cone elevated, compressed, acuminate, smooth, expanding 

 widely at the base, and having on each side a well developed lateral denticle 

 erect and acutely pointed. Anterior teeth curved s3'gmoidally ; the curvature 

 of the posterior teeth is less decided, but they are inclined obliquely towards one 

 or other side. Height of crown 0'012 m. in an anterior example ; a latero- 

 posterior tooth is O'OIO m., and the breadth of the base is equal to the height; 

 the lateral denticles average one-fifth the height of the crown. Root short, 

 prolonged laterally beyond the crown, inner surface prominent, outer one con- 

 cave, inferior surface broad and concave. The teeth exhibit considerable variety 

 in form, but are all characterized by the lateral denticles occui^ying a position 

 allowing a perceptible interval between them and the median cone. 



This species approaches Seapanorhynchus ? subidatus, Ag. ; it is distinguished 

 by the lateral denticles standing erect from the base ; those in S. subulatus are 

 inclined at an oblique angle outwards. The teeth situated in the several parts 

 of the jaws are generally similar in form to those figured of the type specimen 



