536 



NEW YORK STATE MUSEUM 



Cameroceras tenuiseptum Hall (sp.) 



Page 408 



See pi. 3, fig. 1, 2; pi. 5, fig. 5, 6; pi. 6, fig. 2 



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



Vaginoceras oppletum sp. nov. 



Page 413 



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



