16 



PROCEEDINaS OF THE GEOLOGICAL SOCIETY. [NoV. 21, 



The following is a list of the species of Madreporaria from the 

 Sutton stone not hitherto described : — 



MontHvaltia pedunculata, sp. nor. 



parasitica, sp. no v. 



Thecosmilia Suttonensis, sp. nov. 



mirabilis, sp. nov. 



serialis, sp. nov. 



Cyathoc^nia incrustans, sp. nov. 



Astrocsenia gibbosa, sp. nov. 



plana, sp. nov. 



parasitica, sp. nov. 



reptans, sp. nov. 



Elysastrgea Moorei, sp. nov. 



The following species have been previously described from other 

 strata : — 



Monthvaltia polymorpha, Tcim. et 



Fiette. 

 Thecosmilia rugosa, Laube. 



EhabdophyUia recondita, Laube. 

 Elysastrsea Fischer I, Laube. 



The species MontHvaltia pedunculata, M. polymorpha, Astroccenia 

 gibhosa, A. plana, and A. rejytans are common to the Sutton stone 

 and to the Brocastle beds. The small Thecosmilice have the same 

 facies, but are specifically distinct from those of Brocastle ; and the 

 Astroccenice are all very closely allied. The species named by Laube 

 are Triassic ; and all the rest differ from those found in the Lias 

 with A. BucMandi, but clearly belong to the same general horizon as 

 those of Brocastle, and must be referred to the continental strata 

 which will be noticed as being its equivalents. 



An analysis of the species of Mollusca described by Mr. Tawney, 

 and an examination of some fossils he had not the opportunity of 

 seeing, enable me to give the following list of species which had 

 been already described from other strata: — 



SOUTHERNDOWN SeRIES. 



Ammonites angulatus, Schl. \ Littorina clatlirata, Desk. 



Sutton Series. 



Lima exaltata, Tqm. 



dentata, Tqm. 



Cardinia regularis, Tq7n. 



crassissima. Sow., sp. 



Plicatula intusstriata, Emm. 

 Pecten Yaloniensis, Desk. 



Ostrea irregularis "1 i^f.. . 



Liassica, Strick. / ^^^^«^- 



Lima tuberculata, Tqm. 

 Myophoria postera, Quenst. 

 Monotis decussata, Munst. 

 Neritopsis exigua, Tqm. 



This small list has been introduced to demonstrate that the 

 Mollusca and the Madreporaria belong to the same horizon elsewhere. 

 There are in the Sutton and Brocastle beds several species of Mol- 

 lusca which are known to exist in the Lias containing Ammonites 

 BucMandi in England or elsewhere. They will be considered 

 shortly. 



4. The differences hetiveen the beds with Ammonites Bucklandi and 

 Gryphsea incurva and those of Brocastle, Eiuenny, Sfc. — The Lower 

 Lias with Ammonites BucMandi, Pholadomy a glabra, Lima gigantea, 

 and GryphcBa incurva rests conformably on the Southerndown beds, 

 and no unconformity has been traced between it and any lower beds 

 of presumed Liassic age in this district. Nothing, however, can be 



