SOME NEW DEVONIC FOSSILS 



215 



region is of decided interest. While tliese Devonic species seem 

 to agree in hinge structure with tliose wliich have been referred 

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

 ferences may be found and Beushausen's 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. 



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



Cyrtodonta muscula nov. 

 Much more elongate than the preceding, retaining the pterineoid 



Cyrtodonta muscula 



form, narrow in front, widening backward and with a broad 

 anterior sinus. Hinge as in the other species. 



Lotver Devonic. ]\Ioosehead lake, 7 miles north of Kineo, Me. 



