76 COELENTERATA—CNIDARIA SUB-BRANCH II 
dissepiments sparingly developed in outer zone of corallum. 50-60 species 
known, ranging from Silurian to Carboniferous. Maximum development. in 
Carboniferous. 
Amplerus, Sow. Simple, sub-cylindrical, or elongated turbinate.  Calice 
shallow, usually with septal fossulae. Septa moderately numerous, short, never 
produced to centre. Tabulae highly developed, horizontal. Ordovician to 
Carboniferous limestone, 
Aulacophyllum, E. and H. ‘Turbinate. Septa numerous, extending to 
centre. Cardinal septum in deep fossula ; adjacent septa pinnately developed. 
Ordovician to Devonian. 
Menophyllum, E. and H. (Fig. 104). Turbinate. Cardinal septum in 
largest of three fossula. Carboniferous limestone. 
Lophophyllum, EF. and H. Carboniferous limestone. Anisophyllum, E. and 
H. Ordovician to Devonian. Pycnophyllum, Lindstr. Ordovician and Silurian. 
Apasmophyllum, Roem. Metriophyllum, KE. and H. Thamnophyllum, Penecke. 
Devonian. Pentaphyllum, de Koninck. Carboniferous. 
Family 4. Cyathophyllidae. Milne-Edwards and Haime. 
Simple or composite coralla. Septa numerous, radially arranged ; the four prim- 
cipal septa rarely distinguished by greater or smaller size. Tabulae and vesicular 
tissue (dissepiments) abundant. 
Cyathophyllum, Goldf. (Figs. 115-117). Extremely variable in form, 
sometimes simple, turbinate, or sub-cylindrical; sometimes giving rise to 

Fic. 116. 
Cyathophyllum caespitosum, Goldf. 
Devonian ; Gerolstein, Eifel. Natural Cyathophyllum heaagonum, Goldf. Devonian; Gerol- 
size. stein, Eifel. Natural size. 
bushy, fasciculate, or astraeiform colonies, where reproduction takes place by 
calicinal or lateral gemmation. Septa very numerous, strictly radial in arrange- 
ment, and often alternately long and short; the longer septa extending to the 
centre. Visceral chamber filled with numerous imperfectly developed tabulae ; 
vesicular dissepiments highly developed in peripheral portion. Nearly 100 
species known, ranging from Ordovician to Carboniferous limestone Maxi- 
mum development in Devonian. 
