5i° 



NEW YORK STATE MUSEUM 



PLATE II 



Genus mastigograptus nov. 



See plates 9, 10, 12 



Mastigograptus tenuiramosus (Walcott) 



See plate 9, figures 2, 3; plate 10, figure 1; plate 12, figures 1, a 

 Page 216 



1 Enlargement (x 5) of group of fragments of branches to show the 



arrangement and character of the conical appendages 



2 Further enlargement (x 7) to show the jointed base (at a) and the 



paired smaller appendages 



3 Fragment showing connection of larger and smaller appendages (x 7) 



4 Fragment showing lateral notches for insertion of smaller appendages 



(x7) 



The originals are from the Eden shale of Covington, Ky. and in 



the Ulrich collection. 



Chaunograptus novellus Hall 



See plate 10, figure 10 

 Page 225 



5 Enlargements (x 5) of some of Hall's type specimens to show the shape 



and arrangement of the thecae 



Chaunograptus cf. gemmatus sp. nov. 



See plate 10, figure ix 

 Page 226 



6 Enlargement (x 5) of the fragments from the Eden shale at Covington, 



Ky. to show their structure 



7 Further enlargement (x 10) of portion of same to show shape and 



arrangement of thecae 



