254 C. R. Eastman — Upper Devonian Fish Re 



mains. 



later communication lie remarks that " the greater part of the 

 quartzite above the talus heap is supposed" to belong to the 

 Cambrian member of the series, and the Elbert formation is 

 known on the little bench just at the head of the talus pile. 

 For some time past I have regarded it as almost certain that 

 the slab came from the Elbert formation." 



The recognizable specimens on this slab are three in num- 

 ber, and all belong to a large species of Bothriolepis which 

 cannot be identified with any previously described. Exceed- 



FiG. 1. — Bothriolepis coloraclensis, sp. no v. x -£. 



ing the average of B. canadensis in size, it is slightly inferior 

 to B. major', but from both of these the new species is dis- 

 tinguished by its different style of superficial ornamentation, 

 general proportions of the body and appendages, and by pecu- 

 liarities in the outline and structure of the ventral plates. It 

 is difficult to frame a satisfactory diagnosis of the new form, 

 all three individuals presenting only the ventral aspect, and 

 none of them exhibiting the head, though the pectoral mem- 

 bers are attached. At the same time it is possible to form a 

 fairly accurate concept of the relations between this and other 

 species, and for sake of comparison with the well known B. 

 major, figures are given showing the topography of the ven- 

 tral surface in each (figs. 1, 2). In B. canadensis the rhom-- 



