GRAPTOLITES OF NEW YORK, PART 1 779 



PLATE 16 



Genus diplograptus McCoy 



See pi. 17 



Diplograptus laxus sp. nov. 



Page 722 



1 Typical rhabdosome 



2, 3 Rhabdosomes with inflated nemacaulus 



Ashhill quarry, Mt Moreno, Columbia co. N. Y. 



4 Two specimens fi-om graptolite bed 7 of the Deep kill section 



5 Enlargement (x4^) to show the character of the thecae and the sicular 



end 

 6-8 Specimens which have a very lax or loose appearance. This is the pre- 

 vailing appearance of the species at the Deep kill. x2 

 Graptolite bed 7 of the Deep kill section 

 9, 10 Natural size drawing and enlargement (x2) of a relatively long rhabdo- 

 some of more compact appearance 

 Graptolite bed 7 of the Deep kill section 



Diplograptus longicaudatus sp. nov. 



Page 723 



11 Single specimen observed. x2 



Graptolite bed 7 of the Deep kill section 



Diplograptus inutilis Hall 



Page 721 



12 Nearly perfect rhabdosome 



1 3 Enlargement (x2) of a fragment to show the character of the thecae 



Graptolite bed 7 of the Deep kill section 



