PLATE 26 



Rensselaeria ovoides Eaton van gaspensis nov. 



{Sc'e plate 25) 

 Pages 164, 234 



1 Cast of small elonoate dorsal valve 



2 Cast of \'entral valve 



3 Ventral valve so broken as to show the spondj^ium 

 Gaspe sandstone. Gaspe Basin 



4 Profile of conjoined valves 



5 An extremely elongate and narrow shell 

 Grande Grcve limestone. Perce Rock 



Rensselaeria sp. ? 



Page 166 



6, 7 Dorsal and ventral valves with coarse plications 



Grande Greve limestone ; division i. Grande Greve 



Megalanteris thunei nov. 



^Sce plate 27) 

 Page 168 



8 Ventral valve preserving only a portion of the shell 



9 A rather coarsely plicated dorsal valve regarded as questionably per- 



taining to this species 

 10, II Interior of the hinge portion of dorsal valves showing the character 

 of the hinge plate 



Grande Greve limestone ; divisions i and 2. Grande Greve 

 12, 13 Opposite sides of a characteristic example 

 Grande Greve limestone. Perce Rock 



Beachia amplexa nov. 



Page 166 



14-16 Three views of a typical example 



I 7 Cast of ventral valve 



Grande Greve limestone. Perce Rock 



304 



