Protospira minuta nov. 



Page 72 



1, 2 Two views of holotype. x 3. 



Upper Cambrian (Ozarkian) : Hoyt limestone, Hoy t^ quarry, 

 town of Greenfield, Saratoga county, N. Y. 



Hormotoma gregaria nov. 

 Page 73 



' 3 Type specimen, x 3. 



4 Group of specimens. Natural size. 



Silurian : Lower Bertie waterlime, Marcellus,, N. Y. 



Pterinea poststriata nov. 

 Page 74 



5 Left valve preserving surface sculpture. Syntype. Natural 



size. 

 6, 7 Interior casts of two right valves (syntypes), showing hinge 

 and muscle-scars. Drawn too convex. Natural size. 

 Sulurian: Pittsford sh'ale, Pittsford, Monroe county, N. Y. 



Ctenodonta salinensis nov. 



Page 75 



8 Right valve. Syntype. x 2. 



9 Left valve. Syntype. x 2. 



Silurian: Salina beds, Bull's quarry, town of Lenox, Madison 

 county, N. Y. 



Orthoceras vicinus nov. 



Page 76 



ro Holotype. Natural size. 



Silurian : Bertie waterlime, Marcellus, N. Y. 



The originals of the figures are in the New York State Museum. 



