532 NEW YORK STATE MUSEUM 



Cameroceras (Proterocameroceras) brainerdi Whitf. (sp.) 



Page 405 

 See pi. I, fig. 5, 6 



1 Fragment showing the broad lateral saddle of the suture 



The original is from the Fort Cassin beds (A3 of section on page 

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



Cyrtendoceras (?) priscum sp. nov. 



Page 4 -JO 



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 inne/ volutions 

 The originals come from the Beekmantown beds D of the Spelman 

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

 Museum. 



Cameroceras curvatum sp. nov. 



Page 411 



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. 



