36 PERMIAN FOSSILS. 



GoBGONiA iNFUNuiBULiroRMis, Goldf. Op. cit., Germ. Trans., p. 459, 1832 ; and 3d 



English Edition, p. 5/2, 1833. 



— ANTiauA, Goldf. Op. cit.. Germ. Trans., p. 459, 1832 ; and 3d English 



Edition, p. 572, 1833. 

 Retepora flustracea, Phillips. Encyc. Metr., vol. vi, p. 615, pi. iii, fig. 8, 1834. 

 GoRGONiA iNEUNDiBULiroRMis, Goldf. Phillips, Op. cit. 



— ANTiauA, Goldf. Phillips, Op. cit. 



— iNFUNDiBULiFORMis, Goldf. Bronn, Lethsea Geogn. p. 47, pi. v, fig. 



13 a, h, 1835. 



— BETiFOBMis, Schl. Quenstedt, "Wiegmann's Archiv, p. 89, 1835. 

 Retepora flustracea, Phillips. Thomson, Min. GeoL, vol. ii, p. 294, 1836. 



— — ,, Phillips, Lardner's Cycl. Geology, vol. i, p. 190, 1837. 

 GoRGONiA eetiformis, ScM. Morris, Catalogue, p. 38, 1843. 



— — „ Geinitz, Gaea von Sachsen, p. 98, 1843. 



— ANTIGUA „ Op. cit. 



Fenestella antiqua, „ Bull. Soc. Geol. Fr., 2'°' serie, vol. i, p. 24, 1844. 



— flustracea, Phillips. Idem. 



— INFUNDIBULIFORMIS, Goldf. Idem. 



— RETiFORMis, Schl. Idem. 



Last four Synonyms. Geol. Russ., vol. i, p. 221, 1845. 

 Fenestella flustracea, Phillips. Tennant, Strat. List, p. 88, 1847. 



— RETIFORMIS, ScM. King, Catalogue, p. 6, 1848. 



— FLUSTRACEA, Phillips. Howse, T. N. F. C, vol. i, p. 261, 1848. 



— ANTiauA, Goldf. Idem. 



— RETIFORMIS, Schl. Idem. 



— — „ Geinitz, Versteiner., p. 17, pi. vii, figs. 11-13, 1848. 



— ANTIQUA „ Geinitz, Op. cit. 



Diagnosis. — Fronds or foliations variously folded, more or less convoluted, and 

 generally funnel-shaped. Stems or rids slender, more or less bifurcating. Cellules 

 small, bi-serially arranged ; the series separated from each other by a narrow tu- 

 berculated ridge. Connecting processes slender, and generally short. Meshes more or 

 less oval. Non-celhliferous surface marked with fine straight longitudinal strise. Both 

 surfaces of the stems minutely foraminated.^ 



Fenestella retiformis is a variable Coral ; and, in consequence, some have been led 

 to divide it into two or more species ; but I feel satisfied, from examining a large suite 

 of specimens, that the observed differences are not sufficiently persistent to be 

 considered as specific, being due merely to difference of age or incidental causes. 



The stems or ribs, in the young state, show the dividing ridge slightly prominent ; 

 when more advanced, it is strongly raised and tuberculated. These and another 

 modification, all of which are occasionally displayed on one specimen, are represented 

 in Plate II, figs. 9, 10, and 12. In dwarfed specimens the stems are oftener divided 



1 The following is the diagnosis given by Goldfuss : " Gorgonia undulata, infundibuliformis, subtilissime 

 reticulata, ramuUs teretibus, cortice crassiuscula osculis creberrimis tuberculata." (Petrefacta Germanise, 

 vol. i, p. 99.) 



