C. R. Eastman — Upper Devonian Fish Remains. 257 



species are closer to the European B. major than to any other 

 member of the genus. 



Needle Mountains Quadrangle. 



The principal fossilif erons localities of the Elbert formation, 

 and at the same time historically the most interesting, *are those 

 occurring along the eastern edge of 

 the Endlich mesa, Devon Point being 4 



the name given by Dr. Cross to the 

 most productive. Here the fish r 

 remains are distributed throughout 

 beds near the base, and also near the 

 top of the section, being in fact so 

 abundant as almost to justify the 

 name of "fish-bed." And yet the 

 variety of forms represented is sur- 

 prisingly meagre. Portions of Both- 

 riolepis armour are plentiful, prob- 

 ably not more than two species being 

 represented, however. In addition 

 there occur scales belonging to two 

 species of Holoptychius. but this is 

 all. No Dipnoan remains, and no 

 Arthrodires, which invariably accom- 

 pany Bothriolepis and Holoptychius 

 in the Tipper Devonian, are at present 

 known from this locality. IV fig. 4 

 is shown a weathered fragment of a 

 pectoral limb of Bothriolepis, the 

 external layer having been removed, 

 and the bone substance appearing in 

 longitudinal section. No characters 

 remain for determining the species, 

 yet its large size appears to indicate 

 an identity with B. color adensis. 

 Some of the smaller fragments dis- 

 play an ornament of vermiculating 



ridges similar in all respects to that i 



observed in B. leidyi, from the Cats- 

 kill of Pennsylvania ; and in the •■ 



absence of more decisive evidence, they may be provisionally 

 referred to that species. 



The scales of Holoptychius shown in figs. 5 and 6 are pre- 

 served in the form of impressions, but the characteristic tuber- 

 cles and ridges of the exposed surface are clearly indicated. 

 Both of these scales fall within the limits of II giganteus, 

 according to the original definition of that species as given by 



