Section IV.,, 1906. [ 151 ] Tbans. R. S. C. 



XI. — On Amyzon hrevipinne. Cope, from the Amyzon beds of the 

 Southern Interior of British Columbia.^ 



By Lawrence M. Lambe, F.G.S., F.R.S.C. 



Vertebrate Palaeontologist to the Geological Survey of Canada. 

 (Read May 23rd, 1906.) 



In examining, recently, some fossil fishes, from Horsefly river, 

 B.C., presented to the Geological Survey by J. B. Hobson, Esq., C.E., 

 oJ" A^ancouver, in 1895, the writer recognized a specimen of Amyzon 

 hrevipinne. Cope that throws additional light on the structure of this 

 small species. The other specimens found by Mr. Hobson in associa- 

 tion with this s^econd laiown specimen of A. hrevipinne belong to 

 Cope's species C. commune, the characteristic fish of the Amyzon beds 

 of Colorado. 



The type of A. hrevipinne, is from the North fork of the Simil- 

 kameen river and was obtained, in 1888, by Dr. George M. Dawson, 

 who submitted it to Professor E. D. Cope for determination. The 

 original description appeared in 1894 in the Proceedings of the Aca- 

 demy of Natural Sciences of Philadelphia, vol. xlv, p. 401, without 

 illustrations, and the fossil is referred to by Dr. Dawson in his " Eeport 

 on the area of the Kamloops map-sheet, British Columbia," 1895 

 C Geological Survey of Cana,da, annual report, new series, vol. vii, p. 

 76 L, 1896). Prom the beds in which the type of A. hrevipinne. 

 was discovered Dr. Dawson also obtained in 1888 a scale that is appar- 

 ently referable to A. commune. Cope, and of which no mention has 

 hitherto been made. 



Other fossils from the IvTorth fork of the Similkameen obtained 

 by Dr. Dawson are plants and insects which have been described by 

 Sir J. William Dawson^ and Dr. S. H. Scudder^ respectively. Thes3 

 remains are from the shales in which the type of A. hrevipinne was 

 found. 



On the evidence of the plants and insects the age of the Simil- 

 kameen beds is not definitely determined ; the general conclusion points 

 tc the age as late Eocene or early Miocene. 



* Communicated by permission of the Director of the Geological Survey 

 of Canada. 



'Trans. Royal Society of Canada, vol. viii, section iv, 1S91, p. 75. 



' Geological Survey of Canada, Contr. to Can. Palseont, vol. li, part 5, 

 Canadian fossil insects, 1895. 



