BUB-CLASS II 



II KX A< 'OKA LLA A 1>< >K< )SA ASTRA Kl I >A K 



Bfi 



costae granulated. Colnmella absent, dissepiments nuincn.u-. ( 'ivtarrous and 

 Tertiary. 



Coelosmilia, E. and H. (Fig. 153). Like the preceding, but with dis.-rpi 

 ments sparsely developed. Cretaceous and Recent. 



Placoxiuiliit, K. and H. (Fig. 154). Cuneiform, I wise acutely pointed or 

 slightly pedunculate. Calice laterally compressed, elongated. Septa numerous ; 

 dissepiments abundant; columella foliaceous. Epitheca absent; costae granu- 

 lated. Cretaceous. 



J>ijilni-fi-iiiiini, Goldf. Calice laterally compressed, greatly elongated in 

 transverse direction, and bent downwards at the ends so as to become crescent- 

 shaped. Columella and epitheca absent. Costae dichotomously or trieho- 

 tomously furcate. Upper Cretaceous. 



Axosmilia, E. and H. Jurassic. Phyllosmilia, From. Cretaceous. LH/>!">- 

 Hin. K. and H. Cretaceous and Recent. 



/?. Coralla multiplying by lateral gemmation. 



Placophyllia, d'Orb. (Fig. 155). Buds originating on calicinal margin or 

 sides, and giving rise to bushy or massive colonies. Columella styliform. 

 Jurassic. 



Gahixea, Oken. Bushy colonies with cylindrical corallites united by layers 

 of finely vesicular epitheca (peritheca). Recent. 



Stijlina, Lam. (Fig. 156). Massive colonies, with corallites united by co- 

 alescent costae. Septa well developed, disposed in six, eight, or ten cycles. 



GoMf. sp. 



Nattliciin. a, Coialluni, 

 natural sixc ; b, (.'alice ei 



Still! 



Ashtoii, England. 

 enlarged. 



Fit;. 150. 



, E. and H. Coral-Ilag ; Steeple 

 c, Natural six.- ; /-, C'alices 



Dissepiments numerous ; columella styliform. Multiplication by costal gemma- 

 tion. Profuse in Trias, Jurassic, and Cretaceous. 



Placocoenia, d'Orb ; On/ptocoenia, E. and H. Jurassic and Cretaceous. 



<'t/'ifltojt/tt>i-a, Mich. Massive colonies, with corallites united by costae. 

 Septa short, not reaching the centre ; columella absent. Visceral chamber 

 partitioned off by horizontal tabulae. Jurassic and Cretaceous. 



Coccophyttum, Reuss. Massive colonies, with corallites united directly by 

 their walls. Calices polygonal, septa numerous. Columella absent; visceral 

 chamber tabulated. Alpine Trias. 



Pinacopkyllum, Freeh. Triassic. 



Hoiocystis, Lonsd. Massive colonies, Avith corallites united by costae. Four 

 of the septa larger or stouter than the rest. Tabulae in visceral chamber. 

 Cretaceous. 



