SUB-CLASS IT HEXACORALLA—APOROSA—FUNGIDAE 91 
broad mass of costal coenenchyma. Columella lamellar. Jurassic and 
Cretaceous. 
Phytogyra, VOrb. Jurassic and Cretaceous. 
Rhipidogyra, E. and H. (Fig. 159). Corallum fan-shaped, often corrugated, 
and with but a single calicular furrow. Columella lamellar. Jurassic and 
Cretaceous. 
Family 6. Fungidae. Milne-Edwards and Haime. 
Simple coralla, or low, laterally expanding colonies. Septa numerous, upper edges 
serrated ; synapticula (rarely also dissepiments) between the septa. Wall between 
individual corallites absent, but ‘ 
developed on under side of Fi) 
colonies. Reproduction sexual 
or by gemmation. Jurassic to 
Recent. 
Fungia, Lam. p.p. emend. 
Dana. Corallum simple, de- 
pressed, discoidal. Septa very 
numerous, varying in length 
and thickness, united only by 
synapticula, and projecting on 
the lower side as dentated 

costae. Theca absent. Post- fs Pee: 
pliocene and Recent. Microseris hemisphaerica, From. Greensand (Cenomanian); Le 
AIR COTAAG 7 7 Mans, France. wu and b, Upper and lower surfaces, enlarged ; 
Microseris, From. (Fig. Bhs uuteatatees 
160). Corallum simple, dis- 
coidal, circular ; upper side vaulted, lower flat and granulated. Cretaceous. 
Trochoseris, EK. and H. Tertiary and Recent. 
Cyathoseris, EK. and H. (Fig. 161). Corallum turbinate, attached. Young 

Fic. 161. 
Cyathoseris subregularis, Reuss. Oligocene; Monte Carlotta, near Vicenza, Italy. 
a, Top view ; b, Side view, natural size. 
corallites arising from periphery by costal gemmation. Common outer wall 
naked, striated. Cretaceous and Tertiary. 
Lophoseris, E. and H.; Mycedium, Oken ; Agaricia, Lam., etc. Tertiary and 
Recent. 
