182 E. E. TOMES ON THE GEEAT-OOLITE MADEEPOEAEIA. 



of an elongated and somewhat crescentic form, which are placed 

 vertically just below the upper margin of the septum. Below this 

 row of tubereles no markings of any kind appear, the sides of the 

 septa being quite smooth. There are about 104 septa in a large 

 calice. When the upper edges of the septa of this coral have been 

 broken off, and the broken edges worn smooth, as is often the case, 

 the genus to which it should be referred becomes doubtful; it 

 then resembles an Epismilia rather than a Montlivaltia. A very 

 few specimens only have been obtained from the Eairford coral-bed 

 by Miss Slatter. 



Genus Calamophtllia. 



Calamophtllia eadiata, M.-Edw. and Haime. 



It occurs in the Great Oolite of the railway-cutting near Rollright, 

 and at Epwell, between Banbury and Brailes. At both these 

 localities it is common. 



Genus Cladophtllia, M.-Edw. and Haime. 



It is probable that the genus Thecosmilia will have to be sub- 

 mitted to division, the very different manner in which fissiparity 

 takes place in the bushy and capitate forms (operating in con- 

 formity with their variation in form) being of sufficient importance 

 for generic distinction. If this division were made, the bush-shaped 

 species, such as T. Martini and T. Slatteri, would approximate so 

 nearly to the Cladopliyllica that they would be removed to that genus, 

 and there would be no necessity for the creation of a new one for 

 their reception. 



Cladophtllia Babeana, M.-Edw. and Haime, Pol. Eoss. terr. Pal. 

 p. 81 (1851) ; Brit. Eoss. Cor. p. 113, tab. xxii. fig. 2 (1851). 



It occurs in the Great Oolite at Epwell, near Banbury, near 

 Burford, and at Aylworth on the Cheltenham and Bourton-on-the- 

 Water Railway. 



Genus Thecosmilia, M.-Edw. and Haime. 



Thecosmilia Slatteei, n. sp. 



This is a small and well-marked species, having much the aspect 

 of Cladojphyllia Babeana. 



The corallites are free and branching, but crowded and forming a 

 short and close bush. They increase by fissiparity quite rapidly, 

 sometimes dividing three or four times on nearly the same level ; and 

 as some, on the contrary, do so only occasionally, the corallum is 

 crowded in some parts, while in others it is quite open. Notwith- 

 standing the frequency of fissiparous division, the corallites main- 

 tain their cylindrical form, and none of the calices become much 

 elongated preparatory to division, as in such species as Thecosmilia 



