714 R. F. TOMES ON THE OOLITIC 
of the calice. It differs, however, in having larger and deeper 
calices, very few of which are arranged in series, the series in 
all cases being short, and not containing more than two calices. 
The state of preservation of the specimen is unsatisfactory, and 
I prefer for the present to abstain from giving it a specific 
name. 
It was obtained from the Great Oolite at Werry. 
LATIMMANDRA LOTHARINGA, HE. de From. Cat. Polyp. de ’Yonne 
(1856). | 
The species which I have already, in my paper on Great-Oolite 
corals, referred, though not without some hesitation, to the Latime- 
andra lotharinga of M. de Fromentel, occurs also in the Cornbrash 
of Le Wast. Compared with English examples from Burford, Roll- 
right, and Stonesfield in Oxfordshire, and Fairford in Gloucestershire, 
the French specimens present no points of difference. 
Genus THAMNASTRAA. 
In my paper on the Corals of the Coral Rag * I made some’ 
remarks on the non-perforate nature of the septa of the well-known 
Thamnastrea arachnoides, and hinted at the desirability of removing 
it from the genus Thamnastrea. This had, however, practically 
been done by Milaschewitsch, who, while placing it in that genus, 
did so with an expression of doubt ; this I wholly overlooked. 
The species on which the genus Thamnastrwa was founded is a 
dendroid form from the Middle Oolite of Caen: this I have not as yet 
had the opportunity of examining; its near ally, Thamnastrea 
 Lyelli, from Stonesfield, is, ike most of the Great-Oolite corals, 
wholly without internal structure, and whether the tissues were 
perforate or not cannot be ascertained. In the absence therefore 
of direct evidence respecting the structure of both the type and the 
allied species, it is difficult to say whether Thamnastrea is a perfo- 
rate or imperforate genus, but it may with the greatest confidence 
be asserted that, as at present accepted, it is made up of a mixed 
assemblage of forms which have little more in common than the one 
character of confluent septal coste. 
On this subject I shall have occasion further to remark when 
speaking of the Coral-Rag Thamnastree. 
THAMNASTRaA MAMMOSA, M.-Edw. & Haime, Brit. Foss. Cor. p. 119, 
pl. xxiii. fig. 3. 
Specimens from the Cornbrash of Le Wast differ from others from 
the lower part of the Great Oolite of Hydrequent in having the coral- 
lum smaller and more globular; otherwise they are alike, and both 
have the calices rather smaller, and the septa more delicate than in 
the English specimens. 
* Quart. Journ. Geol. Soc. vol. xxxix. p. 558. 
