306 Dr. P. M. Duncan on some Fossil Corals from Sinde. 



cyathus sinuosus and Astroccenia Caillaudi are the most remark- 

 able : the first is subject to some variation in its form, like all 

 simple Corals, but the specimen from Sinde is, even in its mi- 

 neralization, undistinguishable from others found in the Mari- 

 time Alps of Europe ; and the last is a gigantic specimen, with 

 very remarkable, thick inner terminations to its principal septa. 

 The specimen of Cyathoseris Valmondoisiaca is very like the 

 drawing of the French form by Michelin. 



It must suffice to assert the strong probability of the new 

 species being of more than one Tertiary age, until careful col- 

 lectors transmit specimens with their localities marked on the 

 geological maps. The new Eocene species would appear to be : — 

 Phylloccenia conferta, Montlivaltia brevis, Hydnophora rudis, H. 

 Dana, H. plana, H. hemispharica, Trochoseris aperta, Cyathoseris 

 irregularis, and C. magnifica. The Miocene species are probably 

 Dasyphyllia gemmans, Antillia dentata, A. plana, A. ponderosa, 

 Mycedium costatum, Agaricia agaricites, and Porites incrustans ; 

 and the Oculina Halensis, Cladocora Haimei, Pachyseris rugosa, 

 and Corallium pallidum are either of a late Miocene age or of a 

 still later geological epoch. 



EXPLANATION OF THE PLATES. 

 Plate XVIIL 



Fig. I. Oculina Halensis : a, terminal portion of a branch, natural size; 

 b, side of calice, magnified 6 diameters. 



Fig. 2. Phylloccenia conferta : a, corallum, natural size ; b, calices, magni- 

 fied 6 diameters. 



Fig. 3. Dasyphyllia gemmans : a, corallum, one-half the natural size ; 

 b, part of corallum, natural size, showing the aborted branches 

 and the worn costaj ; c, calice, natural size. 



Fi^r. 4. Montlivaltia brevis: a, corallum, natural size; 6, side views of 

 portion of the corallum, showing the epitheca and costse, magni- 

 fied 2 diameters. 



Fig. 5. Antillia plana : corallum, showing the columella, natural size. 



Fig. 6. Cladocora Haimei : a, portions of a corallum, natural size ; b, ca- 

 lice, magnified 6 diameters. 



Plate XIX. 



Fig. 1 . Hydnophora rudis : a, part of calicular surface, natural size ; 



b, monticules, magnified 2 diameters. 

 Fig. 2. Hydnophora Dante : side view of corallum, one-third the natural 



size ; a, monticule, magnified 4 diameters. 

 Fig. 3. Hydnophora plana : a, part of calicular surface, natural size ; 



b, monticules, magnified 4 diameters. 

 Fig. 4. Hydnophora hemisphcerica : monticules magnified 4 diameters. 

 Fig. 6. Trochoseris aperta : a, calicular surface ; b, side view of corallum ; 



both natural size. 

 Fig. 6. Cyathoseris irregularis : corallum, natural size. 



