ILLUSTRATIONS. 
Page. 
Plate XIX. Figs. 1, 2, Fenestella elegans Hall; 3-5, Fenestella cribrosa Hall; 
6, 7, Semicoscinium tenuiceps (Hall); 8-13, Polypora inccpta Hall; 
14—16, Pseudohornera niagarensis (Hall) 102 
XX. Figs. 1-4, Clathropora alcicornis Hall; 5-11, Clathropora frondosa 
Hall, and var. intermedia N. & H 104 
XXI. f?ig. 1, Loculipora ambigua (Hall); 2, Loculipora ulrichi n. sp.; 3-5, 
Acanthoclema asperum (Hall); 6, 7, Clathropora frondosa Hall; 
8-11, Nematopora minuta (Hall); 12, 13, Diamesopora dichotoma 
Hall; 14-16, Pachydictya crassa (Hall); 17-19, Phsenopora fimbri- 
ata canadensis n. var.; 20, Phsenopora fimbriata James . ... 106 
XXII. Figs. 1-6, Lichenalia concentrica Hall; 7-11, Stictotrypa punctipora 
(Hall) ; 12, 13, Kliinopora curvata Ringueberg 110 
XXIII. Figs. 1-3, Pseudohornera diffusa (Hall); 4-6, Diploclema sparsum 
(Hall); 7-9, Rhinopora verrucosa Hall; 10-13, Coeloclema caver- 
nosa n. sp.; 14, Fistulipora tuberculosa Hall; 15, Fistulipora crus- 
tula n. sp.; 16, 17, Trematopora whitiieldi Ulrich; 18, Lioclema 
multiporum n. sp.; 19-22, Lioclema peculiare n. sp 112 
XXIV. Figs. 1, 2, Nicholsonella florida (Hall); 3-6, Eridotrypa striata 
(Hall); 7-9, Acanthoclema asperum (Hall); 10, 11, Batostomella 
granulifera (Hall); 12, 13, Bythopora spinulosa (Hall); 14-16, Lio- 
clema asperum (Hall); 17-19, Idiotrypa punctata (Hall); 20-23, 
Eridotrypa solida (Hall); 24, 25, Ptiloporella nervata (Nicholson); 
26, 27, Stictotrypa punctipora (Hall); 28-30, Diamesopora dicho- 
toma Hall 116 
XXV. Figs. 1-3, Eridotrypa nodulosa n. sp.; 4, Diplotrypa walkeri n. sp.; 
5-7, Lioclemella maccombi n. sp.; 8, Trematopora tuberculosa Hall; 
9, 10, Lioclema ramulosum n. sp.; 11, 12, Batostomella granulifera 
(Hall); 13, Lioclema peculiare n. sp.; 14, Eridotrypa striata (Hall); 
15, Eridotrypa spinosa n. sp.; 16, Eridotrypa solida (Hall); 17-20, 
Acanthoclema asperum (Hall); 21, Rhombotrypa spinulifera n. sp.; 
22-24, Loculipora ulrichi n. sp 120 
XXVI. Figs. 1, 2, Eridotrypa similis n. sp.; 3, Callopora magnopora Foerste; 
4, Lioclema explanatum n. sp.; 5, 6, Ptiloporella nervata (Nichol- 
son); 7-10, Lichenalia concentrica Hall; 11, Monotrypa benjamini 
n. sp. ; 12, Callopora elegantula Hall. 124 
XXVII. Figs. 1-7, Thamniscus dichotomus (Hall); 8, 9, Phsenopora ensiformis 
Hall; 10-13, Taeniodictya schucherti n. sp.; 14, 15, Trematopora 
spiculata Hall; 16, 17, Trematopora whitiieldi Ulrich; 18, 19, 
Lioclema globulare n. sp. ; 20, Lioclema multiporum n. sp 126 
XXVIII. Slab showing abundance of Bryozoan remains 128 
XXIX. Portion of slab shown on PI. XXVIII, magnified 130 
XXX. View of fragment of a thin limestone layer, magnified two diameters. 132 
XXXI. Portion of surface of slab, magnified about two diameters, showing 
fenestellids 134 
