J. W. Dawson—Miabius on Eozoon Canadense. 199 
this nummuline wall, and that it sometimes presents a ragged 
appearance or is altogether opaque. In point of fact it can 
appear distinctly, either in decalcified specimens or in slices, 
only when the minute tubes are filled with some substance 
ae here that, in examining the original specimens of 
i id not doubt 
é *I am indebted to Dr. Otto Hahn for specimens of these most interesting 
ossils. 
It may deserve mention here that the Carboniferous Fusulina very rarely 
shows its tubulated wall, and that Dr. Carpenter had maintained its Nummuline 
affinities before he obtained specimens showing this particu icture. c- 
tures so delicate as these are indeed only preserved exceptionally in fossil speci- 
ms. 
Am. Jour. Sc1.—Turep Serres, Vor. XVII, No. 99.—Makcu, 1879, 
14 
