1898-1902. No. 33.] UPPER DEVONIAN FISH REMAINS. 45 



Cat,skill and Chemung, New York and Pensylvania, first described by 

 Leidy, is also nearly related; Smith Woodward regards it is almost 

 identical with the precedmgi- 



The form described differs from both of the above by the orna- 

 mentation of the exposed part of the scale. The ribs are, in fact, 

 divergent towards the posterior part, instead of being sub- para 11 el 

 or even convergent, as in the case oi H. nob Hiss imiis {Americanus). 

 In front the regular ribs are replaced as a rule by irregular elevations 

 (tubercles). 



I must therefore consider it a new form, and I have named it 

 after Per Schei, the geologist of the 2nd Fram Expedition. 



Horizon. The fish horizon of Skrap Valley. 



Holoptychius cf. tuberculatus Newb, 



A fragmentary scale (S. 1. 27), which as is clearly shown by some 

 of the exposed part, differs considerably from the scales described as 

 H. Scheii. The ribs are almost completely replaced by tubercles. The 

 specimen reminds one to some extent of the scales which Newberry 

 depicted and described as Holopt. tuberculatus "■ It might however be 

 regarded as a portion of a shell belonging to H. giganteus Ag , in 

 which the iibs may be markedly replaced by tubercles. This form, too, 

 has been found before in America in Upper Devonian strata. 



The determination is thus doubtful. 



Horizon. One fragment from the fish horizon in Skrap Valley. 



Glyptolepis cf. paucidens Ac. 

 (PI. VIII, figs 1—2). 



Besides remains of Holoptychius, my material contains scales of a 

 Glyptolepis form. We see partly the back (S. I. 25 b) witli fine, concen- 

 tric lines of growth (fig. 2), and partly the front with characteristic 

 ornament, as a rule badly preserved. I pi'opose to describe the best 

 preserved specimen somewhat more closely. 



1 A. Smith WoodviArd, Notes on Some Upper Devonian Fish Remains in East 

 Greenland. (Bill. K. Sv. Vet. Akad. Handi. 26, IV, No. 10. 1900, pags 4-5). 



2 J. S. Newberry, Ttie Palaeoz. Fishes of N. America, 1889, p. 101, PI. XIX, fig. 14. 



