GRAPTOLITES OF NEW YORK, PART 2 54 







Glossograptus quadrimucronatus (Mall) var. approximatus nov. 



See plate 27, figures 6, 7 

 Page , 



io Most perfect synrhabdosome observed (holotype) 



Utica shale, Dolgeville, N. Y. 

 i 1 Rhalxlosome with distinct apertural spines (paratype) 



12 Large rhabdosome, parti)' preserved as impression and showing- the 



typical characters of the species (paratype) 

 Utica shale, Oxtungo creek, N. Y. 



13 Synrhabdosome, showing two generations of rhabclosomes 



14 Synrhabdosome with central organs 



Utica shale, Dolgeville, N. Y. 

 1 5 Well preserved rhabdosome 



Utica shale, clam at Mechanicville, N. Y. 



Glossograptus quadrimucronatus mut. postremus nov. 



Page 394 



16 Typical specimen (holotype) 



Lorraine (Frankfort) shale, Waterford, N. Y. 



Glossograptus whitfieldi (^Hall) 



Page 394 



i 7 Typical rhabdosome 



Normanskill shale, Glenmont, N. Y. 



Glossograptus (?) eucharis (Hall) 



See plate 27, figure:; n-13 

 Page 397 



18 Rhabdosome with long nemacaulus, preserved in relief 



Utica shale, dam at Mechanicville, N. Y. 

 ra Synrhabdosome showing primary disk 

 Utica shale, Dolgeville, N. Y. 



All figures are drawn in natural size ; the originals of figures 8 and 

 9 are in the National Museum, the others in the New York 

 State Museum. 



