SOME NEW DEVONIC FOSSILS 253 



considered ontogenetically, they are always distinguishable from 

 those, while on the whole most nearly allied to the later expressions 

 in the Oriskany sandstone. 



Lower Devanic. Grande Greve, P. Q. 



Athyris hera nov. 



The sandstones at Gaspe Basin afford casts of ventral valves, 

 one of them of noteworthy size, of subcircular outline, consider- 

 ably arched at the umbo but depressed on the slopes, and with a 

 narrow deep and evenly rounded median sinus ; the surface of the 

 valve bears only the concentric lines of growth and very fine 

 radial striae visible only in the sinus. The valve has a length and 

 width of 45 mm. 



The larger specimen suggests a Spirifer allied to the rare type 

 of S. 1 a e v i s of the Ithaca (Portage) fauna of New York, though 



Athyris hera 



more orbicular and with more pronounced sinus. That species 

 has been regarded as a fimbriated shell, but the fine radial lines 

 of this specimen have less the character of fimbriae than of the 

 lines on S. radiatus Sow. which, without plications, is the start- 

 ing point of a considerable series of radiate-plicate shells. The 

 general approach of both our specimens to species of Athyris, such 

 as A. spiriferoides of the Hamilton fauna indicates a more 

 probable relation therewith. 



Middle Devonic. Gaspe Basin, P. O. 



Spirifer perimele nov. 



This is a shell, abundant though poorly preserved in some of 

 the sandstone blocks, which I should identify with S. carinatus 

 Schnur were it not for the presence of fine and crowded lamellae 



