PLATE 26 



Myalina pterinaeoides Clarke 



(See plate 25) 

 Page 106 



i, 2 Internal casts of left and right valves 

 3 A right valve retaining a portion of its thick shell 

 Locality. Presque Isle stream 



Modiomorpha protea Clarke 



(Sff plate 27) 

 Page 107 



4-8 A series of illustrations showing the aspect of this species and its 



variation in form 

 Localities. Edmunds Hill and Presque Isle stream 



Modiomorpha vulcanalis Clarke 



Page 106 



9, 1 1 Characteristic right valves, showing the very heavy shell 

 10 Sculpture cast of a left valve of greater obliquity and less angularity 

 than the others 



Locality. Edmunds Hill 



218 



