fiOfi NEW XOHK STATE MUSEUM 



vegiciim [pl.l, fig.21, 22] are found, which however may be only some- 

 what abnormal portions of, in the whole, typical specimens. The majority of 

 the specimens are of the typical form. As the thecae usually number 15 and 

 frequently rise to 16 within 10 mm, they would be probably referred by 

 Matthew to his variety, acadicum. 



Dictyonema murrayi Hall 



Plate 3, figure 12 



Dicty on ema murrayi Hall. Canadian Organic Remains, decade 2. 1863. p.l38, 



pl.20, fig.6, 7 



Description. Rhabdosome very large, its form unknown. Branches 

 very stout, 1.5 mm wide, separated by slightly wider interspaces. Transverse 

 connecting filaments straight and rigid, about 3 mm apart. Thecae numbering 

 9 to 10 in the space of 10 mm; apparently with acute extensions of the 

 apertural margins. 



Position and localities. In greenish, drab weathezing sandy shales, 

 between Defreestville and West Saudlake, Rensselaer co. N. Y. 

 [Dale coll.] ; associated with Clonograptus cf. flexilis and T e t - 

 ragraptus quadribrachiatus and T . s e r r a . These shales 

 probably belong to the Clonograptus beds [p.496]. Hall's originals 

 came from hard shales of the Quebec group at Point Levis, where 

 the species is associated with other similarly robust forms of 

 Dictyonema. 



Remarks. The material of this species obtained at the locality 

 mentioned, is but very fragmentary and not able to add any new data to the 

 already meager description which Hall could furnish. 



Dictyonema furciferum sp. nov. 



Plates, figure 11 



Dictyonema sp. nov. Ruedemann. N. Y. State Paleontol. An. Eep't. 1902. 

 p.570 



Description. Portion of rhabdosome seen, flabellate ; 21 mm in length by 

 9 mm in width; consisting of rigidly straight and parallel branches which 



