THIRD REPORT OF THE DIRECTOR I906 169 



PLECTOCERAS Hyatt 

 Plectoceras jason Billings (sp.) 



6435 i^f-^-^ HYPOTYPE Nautilus jason Billings. Cana- 



dian naturalist and geologist. 1859. 4: 464. 



Plectoceras jason Ruedemann. New 

 York state museum bulletin 90. 1906. p. 485, 



fig. 44- 



Lower Chazy limestone 



Valcour, Clinton co. N. Y. 

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



6436 i^f-S-^ HYPOTYPE Ruedemann. New York state museum 



bulletin 90. 1906. p. 484, fig. 43; pi. 24, fig. i. 

 Lower Chazy limestone Valcour, N. Y. 



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



6437 i^-|-^^ HYPOTYPE Ruedemann. New York state museum 



bulletin 90. 1906. pi. 30. 



Lower Chazy limestone Valcour, N. Y. 



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



6438 i^|-^-§- HYPOTYPE Ruedemann. New York state museum 



bulletin 90. 1906. p. 484, fig. 42; pi. 29, 31. 

 Lower Chazy limestone Valcour, N. Y. 



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



PROTOCYCLOCERAS Hvatt 



Protocycloceras ? cf. furtivum Billings (sp.) 



6439 i^^^^ HYPOTYPE: HYPOPLASTOTYPE Orthoceras furti- 



vum Billings. Geology of Canada; Paleozoic 

 fossils. 1865. 1 : 337. 



Protocycloceras ? cf. furtivum 

 Ruedemann. New York state museum bulletin 90. 

 1906. pi. 16, fig. 3. 

 Beekmantown beds 



^ Beekmantown, Clinton co. N. Y. 



R. Ruedemann coll. 1903 



Protocycloceras lamarcki Billings (sp.) 



6440 -i-^f-S-^ HYPOTYPE Orthoceras lamarcki Billings. 



Canadian naturalist and geologist. 1859. 4:362. 



Protocycloceras lamarcki Ruede- 

 mann. New York state museum bulletin 90. 1906. 

 p. 442, fig. 15. 



