42 
Plate 
Calapoecia canadensis Bill,, 0. canadensis var. anticostiensis Bill., and Lyopora favosa 
Figure 1. Calapoecia canadensis Bill. A small colony from Paquette rapids, near 
Ottawa, G.S.C. 113t6b, x §. The neotype here selected. 
Figure 2. Lyopora favosa (M’Ooy). Weathered longitudinial surface of a syntype. 
S.M. A5527, X 
Figure 3. Calapoecia canadensis Bill. A small colony from Salt river, Kentucky. B.M. 
R30147, X §. 
Figure 4)a. Lyopora favosa (M’Coy). Upper siurface of a syntype. Stinchar limestone, 
Craighead. S.M. A5i526a, x §. 
Figure 4b. Part of the same specimen enlarged x li. 
Figure 5a. Calapoecia canadensis Bill. Tuberose specimen from cape Smyth, lake Huron. 
Syntype of “C. huronensis” Billings. G.S.C. 1985, x I. 
Figure 5b. Part of the same specimen enlarged x IJ. 
Figure 6. C. canadensis var. anticostiensis Bill. Part of the upper surface of Billings’ 
holotype of "(7. anticostiensis". G.S.C. 2667a, x §. 
1 The following abbreviations are used in describing the catalogue numbers of specimens figured ; 
S.M Sedgwick Museum, Cambridge. 
B.M British Museum (Natural History). 
P.M-iQ Paleontological Museum, Oslo. 
M.M.K Mincralogical Museum of the University of 
Copenhagen., 
G.S.C Geological Survey, Canada. 
The enlargements or reductions indicated are approximate. 
