ILLUSTRATIONS, 



Page. 

 Plate I. Figures illustrating the structure of coral skeletons 210 



II. Figures illustrating the structure of coral skeletons and Graphularia perplexa 



(de Gregorio) 212 



III. Flabellum conoideum Vaughan ; Flabellum conoideum var. matthewsense 



Vaughan; Flabellum johnsoni Vaughan; Flabellum lerchl Vaughan; Flabellum 

 cuneiforme Lonsdale; Flabellum cuueiforme var. pachyjihyllnm Gabb and Horn; 

 Flabellum cuneiforme var. acutiforme Vaughan; Flabellum cuneiforme var. 

 fragile Vaughan ; Flabellum cuneiforme var. wailesi Conrad 214 



IV. Flabellum cuneiforme var. wailesi Conrad; Flabellum cuneiforme var. niagno- 



costatnm Vaughan; Flabellum remondianuniGabb; Flabellum mortoui Vaughan; 

 Flabellum californicum Vaughan; Flabellum rhomboideum Vaughan ; Aldrichia 



elegans Vaughan ; Platytrochus stokesi (Lea) 216 



V. Platytrochus stokesi (Lea); Platytrochus goldfussi (Lea); Platytrochus claiborn- 

 ensis de Gregorio; Discotrochua orbignianus M.-Edw. and H. ; Sphenotrochus 

 nanus (Lea) _ 218 



VI. Sphenotrochus claibornensis Vaughau ; Turbinolia sulcata Lamarck ; Turbinolia 

 pharetra Lea; Turbinolia wautubbeensis Vaughan; Turbinolia acuticostata 

 Vaugh.an; Turbinolia claibornensis Vaughan; Turbinolia insignitica Vaughan; 



Trochocyathus hy atti Vaughan 220 



VII. Trochocyathus hyatti Vaughan; Trochocyathus lunulitiformis (Conrad); Trocho- 

 cyathus lunulitiformis var. montgomeriensis Vaughan; Trochocyathus califor- 

 nianus Vaughan ; Trochocyathus depressus Vaughan; Trochocyathus stantoni 

 Vaughan; Trochocyathus cingulatus Vaughan; Trochocyathus clarkeanus 



(Vaughan); Trochocyathus striatus (Gabb) 222 



VIII. Trochocyathus striatus (Gabb); Trochocyathus zitteli Merriam; Trochocyathus 

 eonoides (Gabb and Horn) ; Paracyathus alternatus Vaughan ; Paracyathus gran- 

 ulosus Vaughan ; Paracyathua bcllus Vaughau; Paracyathus rugosus Vaughan.. 224 



IX. Paracyathus cylindricus Vaughaji; Caryophyllia dalli Vaughan; Caryophyllia 

 texana Vaughan ; Steriijhonotrochus pulcher Vaughan ; Parasmilia ludoviciana 



Vaughan ; Astrohelia neglecta Vaughan 226 



X. Oculina singleyi Vaughan; Astrohelia burnsi Vaughan; Oculina vicksburgensis 



(Conrad) 228 



XI. Oculina mississippiensis (Conrad) 230 



XII. Oculina singleyi Vaughan; Oculina alabamensis Vaughan; Oculina aldrichi 

 Vaughan; Oculina harrisi Vaughan; Oculina (?) smith! Vaughan; Amphihelia 

 natchitochensis Vaughan; Cix-lohelia wagneriana Vaughan 232 



XIII. Madracis gauei Vaughan; Madracis johnsoni Vaughan; Madracis gregorioi 



Vaughan; Stylophora minutissima Vaughau; Sty lophora ponderosa Vaughan . .. 234 



XIV. Stylophora ponderosa Vaughau; Stylophora perdubia de Gregorio; Astrangia 



expansa Vaughan ; Astrangia ludoviciana Vaughan; Astrangia harrisi Vaughau ; 



Astrangia wilcoxensis A'aughan 236 



XV. Cladocora recrescens Lonsdale; Dichocoenia alabamensis Vaughan; Favia 



merriami Vaughan ; Haimesiastra;a conferta Vaiighan 238 



7 



