E. F. TOMES OF THE GEEAT-OOLITE MADEEPOEAEIA. 193 



The calices are as far apart in the rows as the rows are distant 

 from each other. They are round ; and twelve septa enter into their 

 composition. These are equal in length, and approach near to the 

 centre of the calice ; but there is a small round and well-marked 

 fossula. They, as well as the septal cost®, are strongly moniliform ; 

 and the beaded prominences on their edges are very distinct. The 

 septal costoe are distinct, of equal size throughout, straight and 

 cristiform where they pass over the prominent but rounded ridges, 

 and none of them anastomose. 



The diameter of the corallum is 4 inches, the height of the same 

 3 inches, breadth of the ridges between the furrows 2 lines, distance 

 of the calices apart in the furrows 2 lines. 



Anabacia complanata, M.-Edw. and Haime, Hist. Nat. Corall. t. iii. 

 p. 31 (1860). 



Fungia complanata, Defr. Diet. Sc. Nat. t. xvii. p. 217 (1820). 



Anabacia orbulites, M.-Edw. and Haime, Brit. Eoss. Cor. p. 120, 

 tab. xxix. fig. 2 (1851). 



It is extremely doubtful whether this genus embraces more than 

 one species. Every intermediate form may be met with, between 

 the ordinary lenticular specimens of A. complanata and the globular 

 one designated by MM. Milne-Edwards and Haime A. hemisjphcerica 

 so that it becomes impossible to separate the two. Again, some of 

 the examples from the Trigonia-grit of the Inferior Oolite have a 

 very symmetrical form, and agree so exactly in this respect, and in 

 the delicacy of their septa, with the A. Bouchardi from the French 

 Oolite that they cannot be distinguished. 



Leaving them for the present as merely varieties of one species, I 

 may mention a well-marked variety from the Stonesfield railway- 

 cutting. It is of large size, having a diameter as well as height 

 of more than three quarters of an inch. In form, as well as in size, 

 it corresponds very closely with Genabacia stellulata, being pj^ramidal 

 rather than globular superiorly, and having a deep circular depression 

 beneath, which only occupies the centre of the base. The septa 

 and septal costaa are relatively thick, and they anastomose much less 

 than do those of the ordinary examples. This species occurs so 

 abundantly in so many localities in the Great Oolite as to render 

 any mention of them needless ; but it is worthy of remark that up 

 to this time only a single example has been taken from the very rich 

 coralline deposit at Eairford. 



ZOANTHAEIA TABULATA. 



Family THECOSTEGITID^ de From. 



Genus Cyathophoea, Michelin. 



After great pains and the examination of a great many specimens 

 of one species of Cyatliophora, obviously referable to the same genus 

 as the one figured by Michelin, I still adhere to the recognition 



