PLATE 26 

 Myalina pterinaeoides Clarke 



(Stt plate ^5 I 

 Page ,... 



I, 2 Internal casts of left and right valves 

 3 A right valve retaining a portion of its thick shell 

 Locality. Presqne Isle stream 



Modiomorpha protea Clarke 



(.Set 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, i 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 



