[lambb] on AMYZON BREVIPINNE 135 



Amyzon commune. Cope : scale agreeing in size and ornamentation 

 with scales of largest specimen of this species from Horsefly 

 river. 



IS-'ear Traxquille, Kamloops lake: obtained by Dr. G. M. Dawson 

 in 1890. 

 Amyzon commune?, Cope: three fragments showing portions of 

 the skeleton. 



Horsefly river: obtained by J. B. Hobson, Esq., in 1895. 



Amyzon Irevipinne, Cope : a specimen more perfect than the type 

 and described and figured in this paper. 



Amyzon commune, Cope: three specimens; the largest with the 

 scales well preserved, showing all the fins, but with the head 

 missing (figured in this paper) ; a second with the pectoral 

 and dorsal fins and the supports of the ventral and anal fins 

 preserved, but without the caudal fin and the anterior part 

 of the head ; the third lacking the head, but with the pectoral, 

 ventral, anal and dorsal fins, and the base of the caudal fin, 

 preserved. The second and third specimens show the scales 

 and have the ribs, fin supports, intermuscular bones, etc., well 

 defined. 



The finding of remains of A. commune in association with those 

 of A. hrevipinne in the Similkameen beds is a confirmation of the 

 correctness of Cope's correlation of the Similkameen beds with th^ 

 Amyzon beds of Colorado and Nevada, and the discovery of a fish fauna 

 common to the Similkameen and Horsefly beds points to the probable 

 synchronism of the fish-bearing beds of these two localities. 

 The rocks near Tranquille, from which the other Amyzon remains were 

 obtained, should also, with little doubt, be referred to the age of the 

 Amyzon beds. 



