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POPULAR SCIENCE REVIEW. 
, EXPLANATION OF PLATE. 
Plate 15. Illustrating Eozoon Canadense and its structure. (Partly 
after Dawson and Carpenter.*) 
Fig. 1. Piece of Lower Laurentian Calcareo-serpentinous Marble, from 
Grenville, Canada ; partly decalciJ&ed, showing tiers of the 
sarcode of Eozoon in the lower part, and acervuline structure 
above. The polished portion, not decalcified, is marked a. 
„ 2. Portion of some tiers of Sarcode, decalcified. Magnified. 
,, 3. Portion of an “ Acervuline ” portion, where the segments of Sarcode 
are arranged irregularly, decalcified. Magnified. 
„ 4. Portion of Eozoon, seen by transmitted light, showing parts of 
chambers, the shell-walls, and (at a) some stolon-passages. 
„ 5. Portion of Eozoon, seen by transmitted light, showing parts of 
chambers, showing (at a, a) the very thin essential wall, and (at 6, h) 
traces of vertical stolons, passing from tier to tier. Magnified. 
„ 6. Portion of decalcified Shell-wall, showing minute pseudopodial 
passages as threads. Magnified. 
„ 7 and 8. Groups of branching threads, in the thick shell, decalcified. 
Magnified. 
„ 9 and 10. Surface and section of a portion of essential Shell-wall in 
Eozoon, delicate and tubuliferous, like that of Nummulina and 
other Foraminifera. 
* I beg to acknowledge, with thanks, Dr. Carpenter’s kind assistance in 
the arrangement and preparation of this plate, and in courteous communi- 
cation of information relative to Eozoon Canadense ; and to Sir W. Logan 
thanks are due for specimens. — T. E. J. 
