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 costz distinguish the fossil form. 
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. Soe. 
24. Agaricia 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 
strize are very well developed. The species is hardly separable 
from Corallium rubrum. 
Locality, Sinde Tertiaries. In Europe, in the Turin Miocene. 
Coll. Geol. Soe. 
General 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- 
