29 



Cope, in describing this g-euiis, was doubtful as to its affinities, biit states " that the 

 form of the root recalls the Elasmobranchii, and that of the crown some of the rays. " 

 The types he recorded as from the Fort Union beds of Montana. 



AciPENSKR, LinuEEUs. 



ACIPENSEK, ALBEKTENSIS Sp. nov. 



Elate XXI, fig. 9. 



The strongly keeled and highly ornamented shield shown on plate XXI, apparently 

 represents an ancient sturgeon, for which the above name is proposed. The ornamenta- 

 tion consists of rounded, coalescent ridges and nodes in high relief, and quite smooth, not 

 very unlike the sculptured surface of the shell of some species of turtles. 



This genus has not hitherto been known from rocks lower than the Tertiary. 



Belly Eiver series, Eed Deer river, District of Alberta, 1901. 



Lepidotus, Agassiz. 

 Lepidotus occidentalis, Leidy. 

 Plate XIX, fig. 3. ' 



Lepidotus occidentalis, Leidy, 1860. Trans. Amer. Philos. Soc. Extinct Vertebraba from the Judith 

 River and Great Lignite formations of Nebraska, pi. 11, figs. 20-23. 



Numerous scales, from the " bad lands " of Eed Deer river, are apparently not 

 distinguishable from those described by Leidy under the name Lepidotus occidentalis. 



The scale figured is fairly representative of those in the collections, as regards form 

 and size. The lozenge-shaped, enamelled outer surface is smooth and shiny, with gener- 

 ally a few small, puncture or pit-like depressions scattered toward the centre ; a few 

 growth lines are generally observed parallel to its edge. Length of specimen figured 18-5 

 mm., greatest thickness 3*0 mm. 



Belly Eiver series, Eed Deer river, 1898 and 1901. 



Similar scales were collected by Dr. Gr. M. Dawson on Belly river, N.W.T. (Nos. 

 40 and 41), in 1881, and by Mr. T. C. Weston, at Eoss coulee, near Irvine on the line of 

 the C.P.E., in 1884. 



Ehineastes, Cope. 

 Ehineastes eruciferus. Cape, (sp.) 



Ceralodus eruciferus. Cope. 1876. Proc. Acad. Nat. 8ci. Philadel., p. 259. 



A number of fragments of cranial bones are referred to this species after comparison 

 with the type from the " Fort Union " beds of Montana. The sculpture consists of strong 



