Dr. p. M. Duncan on some Fossil Corals from Sinde, 305 



From the Sinde Tertiaries. Coll. Geol. Soc. and Brit. Mus. 



This is the first instance of a fossil Mycedium ; and the species 

 is more closely allied to the Mycedium Okeni (recent, habitat 

 unknown) than to any other. The parallel, nearly equal, and 

 dentate costse^distinguish the fossil form.j 



23. Pachyseris rugosa, Edwards & Haime. 

 Hist. Nat. des Corall. vol. iii. p. 85. 



A fossil, tolerably well preserved, must be referred to this 

 species, which Michelotti is said to have found fossil on the 

 shore of Cuba, and which inhabits the South Seas. 



Locality, Sinde Tertiaries. Coll. Geol. Soc. 



24. Agarida agaricites, Edwards & Haime. 



The specimen in the British Museum cannot be distinguished 

 from one in the Coll. Geol. Soc, from the San Domingan Mio- 

 cene. 



Locality, Sinde Tertiaries. West Indies, recent. San Do- 

 mingo, Miocene. 



25. Porites incrustans, Edwards & Haime. 



Porites Collegniana, Michelin ; Reuss. 



A well-marked specimen of this species, which is found in the 

 European Miocene of Turin, Bordeaux, Dax, Carry, Vienna, 

 Hungary, and in the San Domingan shales, is amongst the 

 fossils from Kurrachee, Sinde. A worn specimen is in the Coll. 

 Geol. Soc. 



26. Corallium pallidum, Michelotti. 



The specimen of this species is of a pale rose-colour, and the 

 striae are very well developed. The species is hardly separable 

 from Corallium rubrum. 



Locality, Sinde Tertiaries. In Europe, in the Turin Miocene. 

 Coll. Geol. Soc. 



Genei'al Remarks. 



The specimens in the Geological Society^s Museum and in the 

 national Collection are tolerably perfect, and present two forms 

 of mineralization, one of which is distinguished by its dark -red 

 colour, and the other by its paler tint. As a rule, the darker- 

 coloured corals are the oldest ; but, as there are several excep- 

 tions to the rule, colour cannot be employed in distinguishing 

 the Eocene from the Miocene forms. 



Amongst the species common to the Sindian and European 

 Eocene, and which were not noticed by M. J. Haime^^ Trocho- 



