SUB-CLASS II HEXACORALLA—PERFORATA 93 
Eupsammia, E. and H. (Fig. 162). Conical or turbinate, acutely pointed, 
free. Septa very numerous, arranged in five cycles, those of the last cycle 
stouter than the rest. Columella present or absent. 
Eocene to Recent. 
Balanophyllia, Wood (Fig. 163). Simple, sub- 
cylindrical, with broad encrusting base. Columella 
spongy ; septa closely crowded, partly fused together. 
Eocene to Recent. 
Stephanophyllia, Mich. (Fig. 
164). Simple, discoidal; base 
horizontal, calice circular. Septa 
numerous ; the six principal septa 
extending to the centre, the re- 
mainder with fused inner edges. 
Cretaceous and Tertiary. 
Dendrophyllia, Bly. (Fig. 165). 
Corallum branching, increasing oe 
by lateral gemmation. Calices Dendrophyllia elegans, Duncan. Oligocene ; Brockenhurst, 
oval ; septa numerous and slender, chen gs coe natural size; b, Transverse section 
‘ of calice, enlarged. 
those of the last cycle extending 
to the spongy columella, and fused with the converging ends of shorter septa 
of preceding eycle. Tertiary and Recent. 
Lobopsammia, Stereopsammia, E. and H.; Eocene. Astroides, E. and H. ; 
Recent. 

Family 3. ‘Thamnastraeidae. Reuss. 
(Pseudoastraeulae and Pseudoagaricinae, Pratz.) 
Simple coralla, or composite, basally expanded or massive colonies.. Septa numer- 
ous, more or less perforate, and composed of calcareous bodies (trabeculae) arranged in 

Fic, 166, 
Cyclolites undulata, Lam. Upper Cretaceous ; Gosau Valley, Salzkammergut. «, Side view ; 
b, Lower surface; c, Lateral aspect of septum, natural size. 
vertical or fan-shaped rows. Theca between individual corallites absent, but present on 
under side of corallites or on lower side of the common stock.  Interseptal loculi with 
synapticulae and dissepiments. Abundant from Trias to Cretaceous ; rarer in 
Tertiary and Recent. 
Anabacia, E. and H. Simple, free, discoidal, or lenticular coralla, with flat 
base. Upper side vaulted, calice slit-like. Septa very numerous, thin, and 
united by synapticulae. Theca absent. Jurassic. 
