66 Scientific Intelligence. 
tree, and another asserts that it is a concretion, but professes to be 
unable to account for its form and its rings of. growth, surely his 
case becomes very weak after I have made a slice of it, and have 
shown that it retains the structure of w 
Next, they appear to admit that if dpedtinon occur wholly com- 
with scepticism as probably “strings of segregated calcite. 
Since the account of that specimen was published, additional frag- 
ments have been collected, so that ‘new slices have been prepared. 
locality, and are, therefore, probably Upper Laurentian, or per ~ 
Hurorian, so that the eee specimens may appr roach in age t 
Giimbel’s Eozoon Bavaie 
Further, the authors of ore paper have no right to object to our 
regarding the laminated specimens as “typical” Eozoon, If the 
question were as to typical ophite, the case would be different ; but 
the question actually is as to certain well-defined forms which we 
regard as fossils, and allege to have organic structure on the small 
scale, as well as lamination on the nace cale. We profess to 
fragments of corals occur in Paleozoic marstores but we are 
under no obligation to accept irregular or disintegrated specimens 
as hiner and, nies it pet reason from these ok won we 
thie Birds-eye limestone seb the Lower Silurian of Ameri ca, as Crys- 
talline gens! bu : a comparison with the unbroken masses of 
he same coral sho 
Tre : 
a. I propose, shortly, to public por feats examples, showing 
fragments of various kinds of fossils preserved in these limestones, 
and recognizable only by the infiltration of their pores and other 
minute structures. I a l also be able to show that in many cases 
the crystallization of the carbonate of lime and the infiltration of 
*Dr. Hunt, in a recent communication to this Journal for July, 1870, p. 2 
is supposed to tees them as resepestiagh eg a great series of strata not hi eget 
clearly recognised, | ee ee age but distinct from 2’ 
newer than the Upper Laurentian and the Huro: 
