532 



NEW YORK STATE MUSEUM 



Cameroceras (Proterocameroceras) brainerdi Whitf. (sp.) 



Page 405 

 See pi. 1, fig. 5, 6 



1 Fragment showing the broad lateral saddle of the suture 



The original is from the Fort Cassin beds (A 3 of section on page 

 397) at Yalcour N. Y. and now in the New York State Museum. 



Cyrtendoceras (?) priscum sp. nov. 



Page 4 *o 



2 Specimen showing the septa as empty spaces between the fillings 



of the chambers and the siphuncle on the inside of the curved 

 conch 



3 Specimen which retains an earlier volution than the preceding 



type. The chambers are represented as too large 



4 Cast from a mold of a fragment of a volution, showing its circu- 



lar section 



5 Specimen retaining the chambers and siphuncle space in a later 



volution. The apparent evolute form of the conch is due to 



imperfect preservation of the inner volutions 

 The originals come from the Beekmantown beds D of the Spelman 

 ledge at Beekmantown N. Y. and are in the Xew York State 

 Museum. 



Cameroceras curvatum sp. nov. 



Page a 1 1 



6 Exterior of the type of the species 



7 Section of the same, showing the closely arranged cameras, large 



siphuncle. endosipholining. endosiphocone. endosiphosheaths 

 and endosiphotube 

 The type is from the dove-colored Chazy limestone of Isle La Motte 

 and now in the museum of Burlington University. 



