FROM THE OOLITIC STRATA. 17 



Height of corallum 1-^ inch. Length of calice ^ths inch. 

 Locality. Oolite-marl, Painswick. 

 In the Collection of Dr. Holl, F.G.S. 

 Calicular gemmation is frequent. 



2. Montlivaltia Painswicki, Duncan. J?l. I, fig. 12. 



The corallum is rather flabelliform, compressed, especially inferiorly, has a narrow but 

 elongated base, with the remains of former adhesion, and an elliptical and deep calice. 



The epitheca is very strong, transversely ribbed, and folded, moreover, inferiorly ; 

 there is a projection on either side of the base. 



The calicular margin is broad and rounded. 



The septa are numerous, unequal, not exsert, crowded, and some are attached to 

 others near the central space. 



There are six systems of septa and five cycles, with some orders of the sixth in each. 



Height of corallum y^ths inch. Length of calice ^ths inch. 



Locality. Oolite-marl, Painswick. 



In the Collection of Dr. Holl, F.G.S. 



3. Montlivaltia Morrisi, Duncan. PI. II, fig. 13. 



The corallum is turbinate, the base is slender and conical, and the calicular margin is 

 deformed, and more or less oval. The corallum expands above. 



The calice is deep ; its margin is rounded, rather sharp, and there is no columella. 



The septa are stout, numerous, unequal, long, and curved. The larger septa unite 

 deep in the fossa in a kind of whorl. 



There are six systems and five cycles, with part of the sixth. 



The corallum is often deformed by arising close to others. 



Height of corallum -nyths inch. Breadth of calice yfths inch. 



Locality. Inferior Oolite. 



In the Collection of the Royal School of Mines. 



Genus — Thecosmilia. 



1. ThecoSxMilia Wrigi-iti, Duncan. PL V, figs. 1 — 5. 



The corallum is large, massive, and irregular in shape. 



The corallites are cylindrical and increase very slightly in their calices during their 



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