GRAPTOLITES OF NEW YORK, PART 2 



I69 



Dr Whiteaves has sent me for inspection two specimens which are 

 clearly conspecific with the Leroy type. Both come from the Onondaga 

 (Corniferous) limestone of Ontario, Canada, one from Walpole, the other 

 from Oneida. 



Dictyonema fenestratum Hall 

 Dictyonema fenestrata Hall. Foster & Whitney's Geology Lake Superior Land 



Distr. pt 2. 1 85 1. p. 2 23-24; pi. 35, fig. 1 a, b 

 Dictyonema fenestrata Hall. Can. Org. Rem. Dec. 2. 1865. p. 58 

 Dictyonema fenestrata Hall. N. Y. State Cab. Nat. Hist. 20th Rep't. i868- 



p.224 

 Dictyonema fenestratum Pocta. Syst. Sil. Boheme. 1894. v. 8, t. 1, p.192 

 Dictyonema fenestratum Gurley. Jour. Geol. 1896. 4:308 



1897. 



576 



Dictyonema fenestratum Freeh. Leth. Pal. 



This Devonic species which is based upon 

 a fragment from the " argillaceous limestone 

 of Mackinac," ' though repeatedly cited as one 

 of the Devonic Dictyonemas, has not been 

 fio-ured or described again and I have been 

 unable to locate the type. Hall compares it 

 with D. gracile of the Niagara group. 

 Of the Devonic species described in this 

 volume, it resembles only D . perradiatum 

 in its habitus and if Hall's figure is correct, 

 there can be but little or no difference at all Hai'if copies Vf ongPnlifigures ' 

 between the two species, both showing the same dimensions. 



Dictyonema hamiltoniae Hall (Gurley emend.) 



Plate 4, figure 4 



Dictyonema hamiltoniae (nomen nudum) Hall. Can. Org. Rem. Dec. 2. 1865. 



P-53 

 Dictyonema actinotum Gurley. Jour. Geol. 1896. 4:82 

 Dictyonema hamiltoniae ? Grabau. Buff. Soc. Nat. Sci. Bui. 1899. 4:120, 



fig. I 



Freeh \loc. cit.\ has erroneously cited it as a form from the State of New York. 



