ORISKANY FAUNA OF BECKAFT MOUNTAIN 59 



Gaspe limestone no. 5, termed by Billings " Passage beds " from the 

 "Upper Silurian" (Lower Helderberg) to the "Lower Devonian" 

 (fauna mainly of Oriskany species). The shell is less common in the 

 Becraf t mountain fauna than C. pulchella. 



Pholidops terminalis Hall 



Plate 8, fig. 23-25 



1859. Pholidops terminalis Hall, Paleontology of New York. 3:490, 



pi. 103b, fig. 8a-d 



1867. Pholidops arenaria Hall. Idem., 4:413, pi. 3, fig. 24 

 1892. Pholidops terminalis Clarke, op. cit. p. 413 

 Sharply defined impressions of this species are very common. 

 The original of Ph. terminalis was from the Oriskany sand- 

 stone of Cumberland Md., and that of Ph. arenaria from the same 



formation at Knox N. Y. 



Pholidops sp.? 



Plate 8, flg. 21, 22 



1892. Pholidops sp. n., Clarke, op. cit. p. 413 



A few specimens have been seen of a very small Pholidops, 

 unlike Ph. terminalis and the group of species to which it belongs, 

 with terminal beaks, but representing the more common expression of 

 the genus with subcentral beaks, represented by species which range 

 through the Paleozoic rocks from the lower Siluric into the Carbonic. 



Lingula cf. rectilatera Hall 

 1859. Lingula rectilatera Hall, Paleontology of New YorTt. 3 : 156, pi. 9, tig. 



6, 8 

 1892. Lingula sp., Clarke, op. cit. p. 413 



A single incomplete example retains the parallel sides and trans- 

 verse anterior margin of this species described from the New Scotland 



limestone. 



BRYOZOA 



Rhombipora rhombifera Hall 



See Paleontology of New York. 6:18, pi. 11, fig. 15,17-20; pi. 23, fig. 11,12 

 A few twigs of a Rhombipora which agree in size and struc- 

 ture with this Helderbergian species have been observed. 



