SOME NEW DEVON IC FOSSILS 



215 



region is of decided interest 



AYhile these Devonic species seem 

 to agree in hinge structure with those which have been referred 

 to the genus from the Lower Siluric yet it is possible that dif- 

 ferences may be found and Beushausens recognition of the 



Cyrtodonta beyrichi 



validity of Cyrtodonta which has commonly been regarded a 

 synonym of Conrad's term Cypricardites, has been indorsed by 

 Ulrich [Paleontology of Minnesota, 1897. v. 3, p. 534] who has 

 elaborately illustrated the Siluric species. Cyrtodonta* bey- 

 richi in Germany occurs in the Spiriferensandstein of the Hartz 

 mountains at the Kahleberg. 



Loiver Devonic. Moosehead lake, 7 miles north of Kineo, Me. 



Cyrtodonta muscula nov. 

 Much more elongate than the preceding, retaining the pterineoid 



Cvrtodont 



muscula 



front, 



widening 



backward and with a broad 



form, narrow i 



anterior sinus. Hinge as in the other species. 



Lower Devonic. Moosehead lake, 7 miles north of Kineo, Me. 



