536 NEW YORK STATE MUSEUM 



Cameroceras tenuiseptum Hall (sp.) 



Page 408 

 Sfe pi. 3, fig. I, 2 ; pi. 5, fig. 5, 6 ; pi. 6, fig. 2 



1 Section of the specimen represented in plate 3, figure i. 



Vaginoceras oppletum sp. nov. 



Page 413 



See pi. 5, fig. 1-4; pi. 6, fig. i; pi. 9, fig. 1-3 



2 Section of fragment, showing the apical end of the endosiphocone, 



and the endosiphosheaths 



3 Enlargement of part of the siphuncular wall of the last specimen 



to show its structure, x 5 

 The original is from the dove-colored Chazy limestone near Little 

 Monty bay, south of Chazy N. Y., and now in the New York 

 State Museum. 



