718 R. F. TOMES ON THE OOLITIC 
Dimorphophyllia jurensis of Becker, from the Corallian of Nattheim, 
it is unquestionably specifically identical. 
Genus Latrmmanpra, M.-Edw. & Haime. 
LATIMHANDRA SEQUANA, E. de From. Bull. Soc. Géol. de France, 
2me série, t. xiil. p. 862; Monogr. Polyp. Jurass. Sup. pt. 1. 
p- 23, pl. ii. fig. 3. 
M. de Fromentel has described a species of Latimeandra under 
the above name which, he observes, cannot, from the peculiar 
arrangement of the calices, be confounded with any other species. 
There are three specimens of a Latimeandra in the collection for- 
warded by M. Rigaux, all from the upper part of the Corallian, 
which in the number and conformation of the septa, correspond 
with the description and figure of the above species, as given by the 
original describer. 
The arrangement of the calices in lines or in groups between 
distinct and well-developed ridges, much as in the genus Comoseris, 
observable in this species, is not, however, a character on which too 
much reliance can be placed; for not only are the ridges, as mentioned . 
by M. de Fromentel, irregular on different parts of the corallum, but 
in two of the three specimens here mentioned they are wholly wanting. 
The peculiar though inconstant ridges in this species render my 
already expressed opinion that more than one generic form is included 
in the genus Latimeandra, all the more probable. Although given 
by M. de Fromentel as appertaining to the Portland Oolite only, 
it must now be added to the list of species of the Corallian, though 
so far as is known up to the present time, it is confined to the 
upper beds of that formation. 
Genus Isastpma, MM. M.-Edw. & Haime. 
IsaAsTRHA EXPLANATA, Goldf. sp. 
Astrea explanata, Goldf., Petref. Germ. t. i. p. 112, pl. 38, fig. 14. 
Isastreea eaplanata, M.-EKdw. & Haime, Pol. Foss. Terr. Paléoz. 
p. 103. 
Of this well-known species M. Rigaux forwards me a single 
example, which differs from Steeple-Ashton specimens only in 
haying the calicular surface nearly flat instead of convex, and the 
underside almost peduncular, and furnished with a more fully deve- 
loped epitheca. It was obtained from Hourecq. 
IsAsTRHA HELIANTHOIDES, Goldf. sp. 
Astrea helianthoides, Goldf. Petref. Germ. p. 65, pl. 22, fig. 4a. 
Isastrea helianthoides, Milne-Edwards and Haime, Hist. Nat. Cor. 
{. Usp. ooo. 
I have compared specimens received from M. Rigaux with others 
from the Coral Rag of Nattheim, and find that they do not differ in 
