Gaspesia aurelia (Billings) 



Page 198 



17, 19 Views of incomplete specimens of these shells which have an appa- 

 rently central beak, simple narrow elevated ribs with very broad 

 interspaces 

 18 The sculpture of the surface drawn from an impression of the exterior 

 in which the relief is reversed, x 5 

 Grande Greve limestone ; division 2. Grande Greve 



333 



