543 



Okthoc. 



Vl!',» 



Orthoceras asmodeus. Clarke, Bull. 16, U. S. G. S. 1885, 



^ p. 30, pi. 3, fig. 3, magnified SO ; 

 minute ; only -^-^ inch long ; beauti- 

 Qik B.,6. 3 f^lj diiferent from all other De- 



vonian orthocerata ; rings marked 

 by the finest lines lengthwise ; no septa visible. Genest e black 

 shale, Ontario Co., N. Y.— VIII e, 



Orthoceras baculum, Hall, 15th An. Rt. N. Y. 1862, p. 



h'i3f/ /SJ-h. An Rt. 



OL8 



74, plate 8, fig. 6. Siphuncle excentric ; surface unknown. 

 Shape wonderfully cylindrical, scarcely tapering at all; largest 

 specimen nearly an inch thick. Schoharie grit VII h, 



Orthoceras becki, Billings. Can. Nat. & Geol. Vol. 4, 



G-eoLCanadcL. ^K 1859. Geology of Canada, 



1863, page 121, fig. 35. 

 Calciferous sandstone^ 

 II a. 



Orthoceras bigsbyi, Stokes. Geology of Canada, 1863, 



loT. 



Orihocera^^Bigshyi (Stokes) 



page 149, figures 107 a^ h. — Trenton limestone^ 1 1 c. 



