102 



COELENTERATA— ANTHOZOA 



PHYLUM II 



Phjfogyra d'Orb. Jurassic and Cretaceous ; Europe. 



Ehipidogyra E. and H. (Fig. 157). Corallum fan-shaped, often corrugated, 

 and with but a single calicular furrow. Columella himellar. Jurassic and 

 Cretaceous. 



Fig. 157. 

 Rhipidogyra crussa From. Coral-Rag ; Gray, Haute-Saone. 1/2 natural size. 



Suborder 2. FUNGIDA Duncan. 



Solitary or colonial corals. Syna'pticulae in the interseptal and intercostal loculi. 

 Dissepiments present or absent. Septa lamellate and solid or slightly perforate, or 

 composed of a trahecular lattice-work with numerous perforations. Basal structures 

 perforate or imperforate. 



Family 1. Fungiidae Dana. 



Embryo after becoming attached forms a trophozooid, which gives rise to buds 

 (anthoblasts) ; these become detached, forming free individuals (anthocyathi). Adult 

 corallum, simple or colonial, depressed or mitroid in form. Septa of higher cycles 

 perforate, those of the lower perforate or solid. Synapticula, but no dissepiments 

 present. Wall usually perforate in young, free individuals, subsequently more or less 

 compact. No epitheca. 



Fungia Lamarck ; Halomitra Dana ; Polyphyllia Quoy and Gaimard ; 

 Zoopilus Dana ; Cryptabacia E. and H. ; Lithactinia Lesson ; Herpetolitha 

 Escholtz. Recent. Fungia oc- 

 curs also in the post-Pliocene. 



JRi 





Family 2. Agariciidae Verrill. 



Simple or colonial Fungids 

 with lamellar, usually imper- 

 forate, septa. Wall solid in 

 simple genera, basal wall solid 

 in colonies, walls between coral- 

 lites solid when developed. Dis- 

 sepiments present or absent. 



Microseris From. (Fig. 

 158). Corallum simple, dis- 

 coidal, circular ; upper side 

 vaulted, lower flat and granu- 

 lated. Cretaceous. 



Trochoseris'E. and H. Simple species, trochoid and fixed. Tertiary and Recent. 



Cyathoseris Y.. and H. (Fig. 159). Corallum turbinate, attached. Young 



Fig. 158. 



Microseris liemisphaerica From. Greensand (Cenomanian) ; Le 

 Mans, Prance, a and 6, Upper and lower surfaces, enlarged ; c, 

 Profile, natural size. 



