J. W. Dawson—Mobius on Fozoon Canadense. 197 
ganisms, are little acquainted with the appearance of these 
when mineralized with silicates, traversed with minute mineral 
veins, faulted, crushed and partly defaced, as is the case with 
even in public museums, specimens labelled “Hozoon Cana- 
dense” which have as little claim to that designation as a chip 
of limestone has to be called a coral or a crinoid. 
he memoir of Professor Mobius affords illustrations of some 
of these difficulties in the study of Hozoon. Professor Mobius 
18 a Zoologist, a good microscopist, fairly acquainted with m 
ern foraminifera, and a conscientious observer; but he has had 
no means of knowing the geological relations and mode o 
occurrence of Hozoon, and he has had access merely to a limi- 
’ - 
ted number of spasinens mineralized with serpentine. These 
adverse to the organic character of , this p 
expected, in the opinion of many not fully acquainted with 
the evidence, to be regarded as a final decision against its ani- 
mal nature. Yet, however commendable the researches of 
. number of errors 
study of the fossil in situ, and from want of acquaintance with 
