SOME NEW DEVON" IC FOSSILS 1 93 



the spire and forms a broad flat plate on the posterior region with 

 the callus about the spire extending into the aperture, making a 



Q > 



Phragmostoma diopetes 



structure altogether similar to that of P. natator (Portage 

 group), the type of the genus. 

 Lower Devonic. Matagamon lake, Me. 



Tropidodiscus obex nov. 



This is a species of unusual interest in that it represents the only 

 member of the genus known, save the type T. curvilineatus 

 (Conrad) from the Onondaga limestone of New York. The Maine 

 shell is smaller than that, very sharply keeled, narrowly umbilicated, 



I j 



Tropidodiscus obex 



with the outward slope of the whorls direct and without evidence 

 of revolving sulci, the inner slope being vertical. The surface is 

 crossed by fine concentric growth lines bending sharply back to 

 the keel. 



Lower Devonic. Edmunds Hill, Chapman Plantation, Me. 



Euphemus ? quebecensis nov. 



To this well known Carbonic genus I refer with doubt flat or 

 discoid, involute, horizontally coiled shells having a goniatitic 

 aspect, the final whorl deeply overlapping the preceding and closing 



