Natic. 



442 



Km- 



13^83 



Naticopsis wheeleri, {Littorina wheeleri^ Swallow, Trans. 



S^t. Louis Acad. Sci. Vol. 1, 1860). 

 Meek & Worthen, Illinois Report of 

 1873, Vol. 5, page 955.— Collett's 

 Indiana Report of 1883, page 162, 

 hlate 32, figs. 13, 14, natural size^ 

 large specimen. Well marked species. 

 Upper Coal Measures from Indiana to New Mexico. XV, 



Nautilus avonensis, Dawson, Acad. Geol. 1868, p. 310, f. 



x(((. ^^^^^^^^^^^^ •^-^Vv ^"^^^ ■^^^' ^' shell of small 



size; &, cross section; 

 sometimes the outer 

 chamber is more than 

 2 in. in diameter; 

 septa convex, ^ in. 

 apart ; belongs to 

 genus Cryptoceras 

 D'Orb. Abundant at 



Daw. --==^==^ Windsor, N. S., in 



Carboniferous limestone^ XIII? 

 Nautilus buccinum, Hall. (See Oyroceras expansum). 



Ti.ioe 



iyare 7. 

 %/. V.partZ. 



