Geological Survey of Illinois volume 8

Cover Geological Survey of Illinois volume 8
Geological Survey of Illinois volume 8
Illinois State Geologist
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4 6. Several branches of a very perfect fragment, with the branches some- what more rigid than in fig. 4, xi.
4 c. End view of several branches showing their form and the elevations of the tubercles, x9.
Chester group, Sloan's Valley, Ky. E. O. Ulrich's collection.
Plate LI Continued.
PAGE.
Fig. 5. FENESTELLA CESTBIENSIS Ulr 547 5. Eeverse side of a frond showing narrowly rounded brandies and irregu- larly distributed nodes, x9.
Chester group, Sloan's Valley, Ky.
E. 0. Ulrieh's colle3tion.
5 a.
... Thin section, x!8, showing foim of zoopcia at diferent levels. 5 b. Obverse face, x9, showing the relative size of branches and fenestrules, the thin carina;, and the small nodes on same.
Chester group, Kaskaskia, 111.
Illinois State Museum.
. Ihlail- l. N* w"-niui oriJ unr/c-rt- . Fl-jo* ii'. Mh>-i 1J >dt Fig. 6. FENESTELLA FUNICULA Ulr -, (2 6. Obverse side of a specimen, x9, showing the lax growth, cord-like carina and the peculiar zooecia apertures. Keokuk group, Keokuk, Iowa. E. 0. Ulrkh's collection.


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