EXPLANATION OF PLATE 16 



Figs. 1-4 Clcistopora typa (Winchell) emend. Easton ; X 1; original figured cotypes of Lep- 



topora gorbyi Miller ; University of Cincinnati No. 3273 p. 59 



1, Lower surface. 2, Upper surface of same specimen. 3, Upper surface. 4, Lower surface. 



Fig. 5 Clcistopora sp.; X 1; plastocotype of L. h'/'a Winchell p. 60 



Upper surface, showing small corallites. 

 Figs. 6-8 Cyathaxonia hians Easton, n. sp. ; X 1 • • . p. 33 



6, Side view. 



7, Calyx ; holotype ; University of Cincinnati No. 24303. 



8, Calyx; paratype ; University of Cincinnati No. 24304. 



Figs. 9, 10 Microcyclus blairi Miller ; X 1 p. 29 



9, Holotype ; University of Cincinnati No. 3998. 



10, Paratype ; University of Cincinnati No. 4000. 



Figs. 11-15 Hapsiphyllum (Homalophyllites) ^fnnafwj- Easton, n. sp p. 44 



11, Side view. 



12, Calyx of same specimen ; holotype ; University of Cincinnati No. 24314. 



13, Calyx ; X 2; plesiotype ; University of Cincinnati No. 24311. 

 14, 15, Calyces ; paratypes ; University of Cincinnati No. 24310. 



Figs. 16, 17 Cyathaxonia tantilla (Miller) emend. Easton ; x2 p. 30 



16, Side view ; holotype ; University of Cincinnati No. 3940. 



17 , Calyx ; paratype ; University of Cincinnati No. 24404. 



Fig. 18 Microcyathus enormis (Meek and Worthen) ; X 1; holotype; side view . . . . p. 60 



Fig. 19 Palaeacis conica Easton, n. sp. ; holotype ; X 2 p. 56 



Side view ; University of Cincinnati No. 24319. 

 Figs. 20-22 Meniscophyllum minutum Simpson ; X 1 p. 46 



20, Longitudinal section ; paratype; New York State Museum No. 3540/1, 



21, Transverse section ; holotype ; New York State Museum No. 3540/2. 



22, Transverse section ; paratype ; New York State Museum No. 3540/3. 

 Photographs by New York State Museum. 



Figs. 23-25 Hapsiphyllum (Homalophyllites) calccolus (White and Whitfield) ; Xl • • . p. 43 



23, Side view. 



24, 25, Calical views ; plesiotypes ; American Museum of Natural History No. 6365/3. 



Figs. 26-30 Neozaphrcntis tenella (Miller) emend. Easton ; xl p. 45 



26, Side view, 



27, Calyx of same specimen ; holotype ; University of Cincinnati No. 3360. 

 28-30, Calyces ; paratypes ; University of Cincinnati No, 3360a. 



Fig. 31 Pseudocryptophyllum cavum Easton, n. gen. and n. sp. ; X 1 p. 34 



Holotype ; side view ; University of Missouri not numbered. 



Figs. 32, 33 Rotiphyllum calyculum (Miller) emend. Easton; X 1; holotype; University of 



Cincinnati No. 3359 p. 32 



32, Side view, 33, Calyx. 

 Figs. 34-38 Clinophylhim chouteauense (Miller); X 1 • . • p. 47 



34, Side view showing oblique calyx. 



35, Side view ; holotype ; University of Cincinnati No. 3916. 



36, Side view showing oblique calyx of very clean specimen ; paratype ; University of 

 Cincinnati No, 3917, 



37, 38, Side views of ideotype ; United States National Museum not numbered. 



Fig. 39 Clinophyllum excavatum, Easton, n, sp, ; X 1 • p. 47 



Paratype ; University of Cincinnati No, 24319 ; side view. 

 Figs, 40-42 Caninia corniculum (Miller) emend. Easton; X 1 • • P- 49 



40, Side view, 



41, Calyx of same specimen ; holotype ; University of Cincinnati No, 2238, 



42, Side view ; original figured specimen of A. blairi; University of Cincinnati No. 3918, 



[90 1 



