I22 NEW YORK STATE MUSEUM 
For further observations on these Hexactinellid sponges, see 
Hall & Clarke. The Paleozoic Reticulate Sponges Constituting 
the Family Dictyospongidae. State Museum Memoir 2. 1895. 
Clarke. Devonian Glass Sponges. State Mus. Bul. N. Y. 196. 
1918. 
The Great Glass Sponge Colonies of the Devonian. 
Journal of Geology. 1920. ane 
Armstrongia. A New Genus of Devonian Glass 
Sponges. State Mus. Bul. N. Y. 219-220. 1920. 
