48 NEW YORK STATE MUSEUM 



antarcticus, including therewith Sp. chuquisaca Ulrich (Bol- 

 ivia), S p . o r b i g n y i Morris and Sharpe (Falkland Islands) and S p. 

 capensis v. Bueh (South Africa). In view of the characters and 

 variability of 8 p. murchisoni in its typical localities it seems 

 probable to the writer that a knowledge of all these lower Devonic 

 shells (including S p . h a w k i n s i Morris and Sharpe, Falkland islands) 

 which is not so fully based on the characters of the internal cast, 

 will prove them to belong for the most part to Sp. murchisoni. 



Spirifer saffordi Hall 



Plate 6. fig. 23-25 



1859. Spirifer sqfordi Hall, Paleontology of New York. 3:203, pi. 28, fig. 

 2, a-b 



1892. Spirifer cf. fimbriatus Clarke, op. cit. p. 413 



This is less common than either of the other species of Spirifer. 

 Squeezes show that the low, sparse ribs are crossed by distant, con- 

 centric rows of greatly elongated, vertical spine-bases. These are produced 

 both above and below the actual attachment of the spinules, the open- 

 ings of the latter being seen at about the middle of each supporting 

 ridge. From the position and direction of these hollow bases, it would 

 seem that the spinules were either erect or inclined backward. 



Metaplasia pyxidata Hall 



1859. Spirifer pyxidatus Hall, Paleontology of New York. 3 : 428, pi. 100, 

 fig. 9-12 



1892. Spirifer pyxidatus Clarke, op. cit. p. 413 



For figures see Paleontology of New York. v. 8, pt 2, pi. 39, fig. 19-22 



This peculiar shell, which is common in the Oriskany at certain other 

 localities, specially at Cayuga Out., and is found also in the Onon- 

 daga limestone, is not of infrequent occurrence at Becraft mountain, 



