B. F. Tomes — Sotne Cretaceous Madreporaria. 551 



an intimate internal examination as would be necessary to determine 

 their relationship on structural grounds, I found great difficulty in 

 admitting* as the representatives of distinct genera, forms which were 

 so absolutely similar in all their more obvious characters. And this 

 great general resemblance did not fail to strike other observers, fully 

 competent to give an opinion. 



Examples of Leptophyllia davata, Eeuss, from Gosau, and of 

 Turbinoseris cle Fromenteli, Duncan, from Atherfield, in my own 

 collection, being placed before my late and much lamented friend 

 Dr. Wright, brought forth the prompt affirmation of their generic 

 identity. Of the generic peculiarities of LeptophyUia, M. E. Pratz 

 has given so full an account, that it will be surperfluous for me to 

 enter into the details.^ 



Although I have long been aware of the similarity in all outward 

 details existing between Leptophyllia davata and Turbinoseris de 

 Fromenteli, I did not know that there were synapticulse in the former. 

 Now, however, that not only their presence but their precise confor- 

 mation has been clearly demonstrated by M. Pratz, this is confirmation 

 in my opinion of the unity of the genera Leptophyllia and Turbinoseris. 

 The two genera thus brought together are, I know, placed by Prof. 

 Duncan, the one, Turbinoseris, in the Fungidoe, and the other, Lepto- 

 phyllia, in the newly-proposed family Plesioporitidce ; the supposition 

 being that the former has imperforate, and the latter perforate septa. 

 But I cannot see that the two differ generically from each other, 

 and I therefore regard them as identical. 



The earliest appearance of the genus is in the Oolite (assuming 

 that the Oolitic Leptophyllioe structurally resemble those of the Chalk), 

 and several species are recorded by Etallon and M. de Fromentel. 



Of the upward range of the genus I can only decide from the 

 evidence afforded by Reuas of the occurrence of a species in the older 

 Tertiary strata of the Alps.^ Not having had the opportunity of 

 examining any of the West-Indian species of Turbinoseris described 

 by Prof. Duncan, I am unable to speak of them, except to observe 

 that I do not see anything in the description of either genus or 

 species which is irreconcileable with that of LeptophyUia. 



Leptophyllia Anglica, Tomes. 



Turbinoseris de Fromenteli, Dune, Supp. Brit. Foss. Cor. pt. ii. p. 42, pi. xv. 

 tig. 13—18, 1870. 



As the genus Turbinoseris must give way to Leptophyllia, and a 

 species has already been named after M. de Fromentel by M. Etallon, 

 a new specific name is needed for the present species. I therefore 

 propose that for the future the name Anglica be applied to it. 



There are specimens in the British Museum which have been 

 obtained from Pottou, as well as others from Atherfield. 



1 Palseontographica, vol. xxix. 1882. 



- Palaout. stud. u. die Alter. Tertiarsch. der Alpen, p. 10, pi xxxvii. fig. I. 

 and p. 36, pi. xliv. fig. 8. 



