PLATE 28 



Palaeosolen cf. simplex Maurer 



(See plate 17) 

 Page in 



i A right valve with the crescence ridge developed by compression, x 2 

 2-4 Other valves of this species ; figure 4. x 2 

 Locality. Presque Isle stream 



Cypricardella sp. 



Page in 



5 Sculpture cast of a left valve 

 Locality. Presque Isle stream 



Leptodomus corrugatus Clarke 



Page 109 



6 A right valve 



Locality. Presque Isle stream 



Allerisma sp. 



7 Locality. Moose River sandstone, Misery stream 



Leptodomus communis Clarke 



Page io(3 



8 A left valve provisionally regarded as of this species 

 9, 10 Characteristic left valves 



Locality. Presque Isle stream 



Nuculites cf. oblongatus Conrad and ellipticus Maurer 



Page in 



1 1 The single valve observed 

 Locality. Edmunds Hill 



Palaeoneilo circulus Clarke 



Page no 



12-14 Left valves 



Locality. Presque Isle stream 



Palaeoneilo sp. ? 



Page in 



15, 1 6 Left and right valves of a species not satisfactorily identified, with 



gently sinuate posterior slope 

 Locality. Presque Isle stream 



222 



