THIRD REPORT OF THE DIRECTOR 1906 15^ 



Rio de Janeiro. 1899. v. 10. Author's Eng. ed. 

 1900. p. 20, pi. 2, fig. 23, 25. 



Siluric Rio Trombetas, Para, Brazil 



O. A. Derby & J M. Clarke, donors 



6381 -^ifii- TYPE Clarke. Arch, do Mus. Nac. do Rio de 



Janeiro. 1899. v. 10. Author's Eng. ed. 1900. 

 pL 2, fig. 24. 



Siluric Rio Trombetas, Para, Brazil 



O. A. Derby & J. M. Clarke, donors 



CEPHALOPODA 



BALTOCERAS Holm 



Baltoceras (?) pusillum Ruedemann 



6382 1^^^^ TYPE Baltoceras (?) pusillum Ruede- 



mann. New York state museum bulletin 90. 



. 1906. p. 431, pi. 9, fig. 4, 5. 



Beekmantown (Fort Cassin beds) 



Valcour, Clinton co. N. Y. 

 G. van Ingen & R. Ruedemann, coll. 1899 



BARRANDEOCERAS Hyatt 



Barrandeoceras natator Billings (sp.) 



^383--!--- HYPOTYPE Nautilus natator Billings. 



Canadian naturalist. 1859. v. 4, no. 6, p. 466. 

 Barrandeoceras natator Ruede- 

 mann. New York state museum bulletin 90. 1906. 



Pl- 32, 33- 



Upper Chazy limestone Valcour island, N. Y. 



R. Ruedemann, coll. 1904 



CAMEROCERAS Conrad 

 Cameroceras (Proterocameroceras) brainerdi Whitfield (sp.) 



6384 -Vy— HYPOTYPE Ruedemann. New York state museum 



buhetin 90. 1906. pi. i, fig. 5, 6. 

 Beekmantown (Fort Cassin beds) 



Valcour, Clinton co. N. Y. 

 G. van Ingen & R. Ruedemann, coll. 1899 



6385 ^^yY— HYPOTYPE Ruedemann. New York state museum 



bulletin 90. 1906. pi. 2, fig. i. 



