304 Dr. P. M. Duncan on some Fossil Corals Jrom Sinde. 



and open in most cases. The outer part of the calice is more or 

 less separated from the inner, and the septa are wide apart, very 

 distinct, and more or less dentate. The costse on the pHcated 

 external wall of the corallum are distinct, large and irregular in 

 size. The synapticulse are wide apart and distinct. Peduncle 

 not wide. Height of coral J-| inch. Width of a calice -fi inch. 



Locality, Sinde Tertiaries. Coll, Brit. Mus. 



This species is readily distinguishable by its calices and large 

 irregular costse; and its calices resemble those of Trochoseris 

 aperta in many respects. When worn and deprived of its 

 " collines,'' this species presents the appearance of a series of 

 cup-shaped depressions with wide interspaces. See specimen in 

 Coll. Geol. Soc. 



21. Cyathoseris magnifica, n. sp. PI. XIX. fig. 7. 



The corallum is large, convex, and irregularly rounded above, 

 and trochoid, with a small attachment below ; the wall is ranged 

 in rounded folds which do not much afi'ect the calicular surface, 

 and it is very faintly costulated. The calicular surface is very 

 Astrsean in its appearance ; the synapticulse between the septa 

 determine the family, however. Calices unequal and irregular 

 in shape, simple, not in series, varying in depth, and all more 

 or less infundibuliform ; they are separated by a coenenchyma, 

 which is more or less marked by the costse, and they are im- 

 bedded and are not exsert. The septa are numerous above, but 

 are grouped in paliform masses in contact with the broad flat 

 columella. The wall is thick. Height of corallum 2-rV inches, 

 breadth 3^^ inches. Breadth of a calice t^-- r_ inch. 



Locality, Sinde Tertiaries, Kurrachee. Coll. Brit. Mus. 



The convex upper surface, with its crowd of deep calices, 

 distinguishes this species, which is widely separated in its septal 

 arrangement from all the others. 



22. Mrjcedium costatum, n. sp. PI. XIX. fig. 8. 

 The corallum is in rather thick frondiform expansions, whose 

 •under surface is marked by long, parallel, straight, equal, and 

 slightly prominent smooth costse, and whose upper surface pre- 

 sents calices more or less inclined, a little raised on one side, 

 often deep, separate generally, or occasionallyjplaced on mammil- 

 lated elevations. The septa are thick at the calicular margin, 

 delicate within, and are continuous with long, parallel, distant, 

 subequal costse, which are regularly dentate. The columella is 

 very small, and there are two or three cycles of septa. The 

 blunt teeth of the costse are not restricted to the neighbourhood 

 of the calices. Thickness of corallum tV-tV i"ch. Costse eight 

 in -Ar inch. 



