



374 Geological Society. 



3. " On the Fossil Madreporaria of the Great Oolite of the 

 Counties of Gloucester and Oxford." By Robert F. Tomes, Esq., 



F.G.b. 



This paper is in continuation of the papers which the author 

 has already published in the 4 Quarterly Journal of the Geological 

 Society/ The author called attention to the fact that there has 

 been sometimes in the study of corals a confusion made between 

 growth by fissiparity and by gemmation. If the former process 

 result from the gradual conjunction of two opposite septa, so as to 

 form a new divisional wall in the calyx, there is no risk of any such 

 confusion ; but if the separation has been by the formation of a con- 

 striction in the central part of an elongated calyx, this may be, and 

 has been, confused with growth by gemmation. 



A large number of the forms here described by the author are in 

 the collection of Mr. T. S. Shatter, F.G.S., and were collected near 

 Fairford, Gloucestershire. They occur in a white marly clay, 

 occurring between the Forest Marble and the Cornbrash. A detailed 

 section was given, and the particulars of some other coralliferous beds. 

 These, the author showed, are not all upon the same horizon, though 

 there is a considerable relation between their coral faunas. The 

 author gave a description of twenty genera and thirty-four species. 

 Of these the following genera are new to the British Oolites : 

 Bathyccenia, a new group of the family Astraeidse {EusmilincB), con- 

 taining two species ; Favia, Astvoccenia, Enallolielia, and Trycydo- 

 seris are for the first time recorded as occurring in the British 

 Oolites ; and Confusastrcea and Oroseris, recorded by the author from 

 the Inferior Oolite, are now added to the coral-fauna of the Great 

 Oolite. The latter part of the paper consisted of an elaborate 

 description of the genera and species. 



February 21, 1883.— J. W. Hulke, Esq., F.R.S., 



President, in the Chair. 



The following communication was read : 



u Notes on the Corals and Bryozoans of the Wenlock Shales 

 (Mr. Maw's Washings)." By G. R. Vine, Esq. Communicated by 

 Prof. P. Martin Duncan, M.B., F.E.S., V.P.G.S. 



The author briefly discussed the views of different writers upon 

 the systematic position of the genera Ohcetetes, Montiadipora, and 

 their allies, and also of the forms referred to the Polyzoa, and gave 

 a list of 39 species and varieties of Corals and Polvzoa obtained by 

 him from Mr. Maw's washings of deposits belonging to the Wenlock 

 series in Shropshire. These forms were referred by him to the 

 genera Delayia, Monticulipora, Callopora, Ihliolites, Thecia, Favo- 

 rites, Syringopora, Holy sites, Ccenites, Cyathophyllum, Lindstrcemia, 

 Cladopora, Leioclerna, Ceriopora, and Ceramopora. New species 

 are Leiochma granatum and pulchellum. 



