BULL. GEOL. SOC. AM. 



VOL. 28, 191G, PL. 26 



.^m'r '-m^^^^^^"^^^ r^y:^- 



MOTTLED LIMESTONE FROM WHSTNTPEG 



'IMio (liirk-slained iuons are nearly i)r,re iloldiuile. with a fe^v partially doloniilized casts. They are 

 traversed by worm horin.iis, the cri Icr-like ])ils. Tlie ealcitic portion is very fossil il'erons 



XXXII— I'.ii.i.. Ckoi.. Sor. A\i.. \'<M 



