188 E. F. TOMES OS THE GEEAT-OOLITE MADEEPORAEIA. 



Asteoccenia phillipsi, n. sp. Plate YII. figs. 6, 7. 



The corallum is not very large ; it is in crusting, but becomes 

 elevated and somewhat gibbous by subsequent growth. 



The calices are irregular in size and form, but are generally 

 hexagonal. They are moderately deep, and the walls dividing them 

 are thick and prominent. There are from eighteen to thirty-one 

 septa ; of the latter number nine are principal ; they are smaller 

 about the middle and are joined to the columella ; nine others are 

 about two thirds of the length of the first ; and the remainder are 

 short. They appear to represent nine systems, and have three 

 cycles, of which the third is incomplete. All the septa are thick 

 and mount onto the top of the wall, where they have a prominence 

 corresponding to the cycle to which they belong. When unworn, 

 their margins are regularly tuberculated ; but the tubercles are 

 elongated across the septa, and hence have more the appearance of 

 transverse ribs than tubercles. The columella is not very prominent, 

 but is well defined. 



The corallum is from 6 to 18 lines in height ; and the calices 

 have a diameter of from 1 to 2 lines. 



I have met with four examples of this coral, three of which were 

 found attached to oysters in the Stonesfield railway-cutting, and 

 the other taken from the surface of the adjoining field. 



Compared with the Astrocoenia decaphyUa from the Cretaceous 

 formation of Gosau, it has much the same subgibbous shape, but 

 has larger calices, septa which are divided into a different number of 

 systems, and the edges of which have transverse papillas or tubercles. 

 With the so-called Astrocoenia of the Glamorganshire Lias it has 

 little affinity. 



-&^ 



ZOANTHAKIA PE1IPOEATA. 



Family PORITIDJE. 



Genus Thamnaste^ea, Le Sauvage. 



Thamnaste^ia Ltelli, M.-Edw. and Haime, Brit. Poss. Cor. pt. ii. 

 p. 118, tab. xxi. fig. 4. 



This species is very abundant at Stonesfield, from which place the 

 specimens were obtained which were described and figured by MIT. 

 Milne-Edwards and Haime. But it is rarely met with except in 

 fragments ; and this renders it difficult to make an approximate esti- 

 mate of the height to which it attains. Prom the great difference, 

 however, which exists in the diameter of the fragments, as well as 

 their nearly cylindrical form, it may be assumed that they tapered 

 upwards very slowly, and that it was a tall species. 



It occurs also at Pairford, Eollright, and Epwell, and appears to 

 be common at all those places. 



Thamnastb^a hiceophylla, n. sp. 



The general form of the corallum is that of a tall bush, perhaps 

 about a foot in height, sections of the branches of which show that 



