PLATE 15 



Cyrtodonta muscula Clarke 



Page 74 



1-3 Internal casts of both valves with enlargement of hinge 

 Locality. Seven miles north of Kineo, Mooseheacl lake 



Cyrtodonta beyrichi Beushausen 



Page 73 



4 Internal cast of right valve 



5, 6 A left valve with cast of hinge exposed and enlarged 

 Locality. Seven miles from Kineo, Moosehead lake 



Cardiomorpha (Goniophora ?) simplex Clarke 



Page 77 



7, 9 Left valves showing outline and proportions, muscle and pallial 



scars 



8 Internal cast of expanded valves showing muscle scars and the filling 

 of the prodissoconch 



10 Enlargement of part of a similar cast showing details of the striated 



ligament surface and entire absence of denticulations. x \ l / 2 



1 1 Enlargement of anterior portion of another cast showing the details of 



the anterior adductor and foot scars, of the ligament area and the 

 filling of the prodissoconchs. The transverse striated band in front 

 is a portion of the matrix. 

 Localities. Tomhegan and Soccatean points, Moosehead lake 



Cypricardinia magna Clarke or cf. crenistriata Sandberger 



Page 76 



12,13 Two right valves 



Locality. Baker Brook point, Moosehead lake 



Modiomorpha odiata Clarke 



(Sec plate 16) 

 Page 74 



14 Right valve 



15 Left valve 



Locality. Tomhegan point, Moosehead lake 



196 



