Urasterella Stella nov. 



Page 49 



(See pi. 13, fig. 1) 



1 Type specimen (holotype). Abactinal view, x 2. 



2 Paratype. Abactinal view of specimen, retaining the rods of the 



ambital plates, x 2. 

 Devonian: Portage group (Middle Grimes sandstone) 3^2 miles 

 northeast of Naples, N. Y. 



Urasterella ruthveni (Forbes) mut. arisaigensis nov. 



Page 46 



(See pi. 13, fig. 1) 



3 Specimen (holotype) showing the actinal (ventral) side, x 2. 

 Silurian: Arisaig series. Mouth of Stonehouse brook, Nova 



Scotia. 



Urasterella schucherti nov. 



Page 50 



(See pi. 2, figs. 3 and 4) 



4 Type specimen (holotype). Abactinal view. From gutta- 



percha squeeze, x 2. 



5 Paratype. Actinal view, x 2. 



Devonian : Chemung beds, Kirkwood, Broome Co., N. Y. 

 The photographs are made from gutta-percha squeezes, the molds 

 of which are in the New York State Museum. 



