REPORT OF THE STATE PALEONTOLOGIST 1902 117o 



shown more species in common to the two formations than has he, 

 but I do not agree with him that the Cobleskill is without 

 Niagaran elements. The evidence I have presented indicates that 

 the Cobleskill fauna is tke last return of Guelph and Niagara 

 species, and with the close of the Cobleskill the last Niagaran 

 species disappears. The presence of these important Niagaran 

 elements justifies one in keeping the Cobleskill formation distinct 

 from the Manlius limestone. 



The use of the term Manlius in the broad sense proposed by Mr 

 Schuchert involves the duplication of terms 1 , a feature which 

 should be reluctantly accepted even if the stratigraphic and 

 paleontologic interpretations could be considered correct. 



Additional note 



The fauna of the Cobleskill limestone of New Jersey, together 

 with that of the underlying shales and limestones which are 

 considered of Salina age has recently been described and illus- 

 trated by Weller. 2 The formations studied lie between the 

 Rondout formation and the Bossardville limestone and are de- 

 scribed under the name Decker Ferry formation, which Weller 

 believes is the southern extension of what is now recognized as 

 the Cobleskill limestone of Ulster county. This formation is 

 best exposed in the Nearpass quarry near Port Jervis. 



The number of species identified from this formation is 48. 

 Six of the species previously known were described from the 

 " Coralline " of Schoharie county by Hall, one Chonetes 

 jerseyensis is found in the Cobleskill in Schoharie, Herki- 

 mer, Onondaga counties and at Cayuga lake. The species now 

 recognized as Proetus pachydermatus Barrett has 

 been obtained from the Cobleskill in Schoharie and Ulster 

 counties. Eight of the species, Favosites pyriformis 

 Hall, Halysites catenulatus Linn., Atrypa retic- 

 ularis Linn., Leptaena rhomboidalis Wilck., 

 Orthis flabellites Foerste, Reticularia bicostata 

 Van., Pterinea emacerata Con. and Pterinea sub- 

 pi a n a Hall, are known from the Niagara of the interior but 



1 Science, Dec. 15 ; 1899. p. 975. 



1 Geol. Sur. N. J. Report on Paleontology. 1903. 3:62-75. 



