1866.] DriTCAK INFEA-LIAS COEALS OP SOUTH WALES. 25 



8. Distvibution of tlie Madreporaria /rom the Kcuper to tlie Ammo- 

 nites-Bucklandi heds. — Before the discovery of the Madreporaria of 

 the Infra-lias of Wales, it might have been very correctly asserted that 

 the coral-fanna of the strata between the Kenper and the zone of A. 

 BucJclancli was poor in the extreme, and that it bore no relation, as 

 regards the number of its species, to the associated moUuscan fauna. 



The 2Q new species found at Brocastle added to the 7 new species 

 of the Sutton series form a large fauna special to the British Infra- 

 lias. To these must be added the 5 species common to the Brocastle 

 beds and the zone of Ammonites Moreanus in the Cote d'Or and its 

 equivalent beds, and the interesting species, 3 in number, which 

 give such a Triassic facies to part of the Sutton-Stone Madreporaria. 

 Taken as a whole, the 40 species from these limited British beds are 

 numerically more important than the Madreporaria of the British 

 Upper Oolite ; and no other Liassic strata yield forms sufficient for 

 an approximative comparison. Although there are many species 

 which are not common to the Brocastle and Sutton beds, still the 

 facies of both collections are much alike, and the small Montlivaltim 

 and Thecosmilice are closely allied. There is not a greater dif- 

 ference between the two collections of species than might be ex- 

 pected between those occupying the base and those of the higher 

 parts of a very considerable and highly fossiliferous limestone. The 

 AstroccmicB are aU. closely allied ; and the Triassic species, alone, form 

 a ground for asserting a difference. 



MM. d'Orbigny, Terquem, Piette, and de Promentel have named 

 species from the strata between the Trias and the zone of Grypliaa 

 incwva in France ; and, as has been noticed, five of the species found 

 in the upper part of the Infra-lias have been discovered in the Bro- 

 castle conglomerate. 



The following are the species of the French Infra-lias : — 



10. Septastraea excavata, de From.\ 



11. Isastrsea basaltiformis, de From. 



12. Condeana, Ch. et Dew. 



13. • Sinemuriensis, de From, t ' 



14. StylastraeaSinemiiriensis, de From. 



15. Martini, de From. 



16. Astrocsenia Sinemuriensis, d' Orh.^ 



sp. J 



17. clavellata, Tq^n. et Tiette. 



1. Montlivaltia Sinemuriensis, d'' Orb. 



2. Martini, de From. 



3. discoidea, Tqon. et Piette. 



4. Haimei, Ch. et Dew. ^ 



5. polvniorpha, Tqm. et Fi. f 



6. Thecosmilia Martini, de From, t 



7. Michelini, Tqm. et Fi. t 



8. coronata, Tqm. et Fi. 



9. Septastr£ea Fromenteh, Tqm. etFi.'^ 



AU these French species are rare. 



Yery probably Isastrcea hasaltiformis of the zone A. Burgundice in 

 the Cote d'Or, the equivalent of the zone of A. planorhis, is closely 



ristiques " of the zone of A. angidatus are very numerous. The zone of A. bisul- 

 catus contained 57 special forms and 177 species found in the beds below, 

 addition to 140 which pass upwards. 



* In the A.-angulatus zone of England, but not in Grlamorganshire. 



t These species are also found in the South Wales (Grlamorganshire) beds. 



\ This species is hardly sufficiently diagnosed to distinguish it from the 

 numerous Astrocaenians of the Glamorganshire beds ; like A. Op^peli, Laube, it is 

 too generic in its determination. I have therefore been obliged to remove these 

 two species from the British 1 ist ; but nevertheless A. reptans, nobis, may turn 

 out to be A. Sinemuriensis, d'Orb., sp. ; and A. gibbosa, nobis, has much in com- 

 mon with, but some structural distinctions of importance from, A. Oppeli, Laube. 



