38 THE FOSSIL CORALS AND 



beneath. The costse, distinct near the calice, either merge into a broken mosaic-like 

 epitheca or pass straight downwards with gentle undulations, so as to reach the lower 

 end, but not the curved base. The costse are in sets at the margin, three small being 

 between two large ; they are well developed, slightly projecting, granular, united by 

 exotheca, and the largest order is not invariably taller than the others. The calice 

 is elliptical, contracted, shallow, and the septa corresponding with the larger costae 

 pass in towards the small axis. The transverse section below the calice indicates that 

 the septa are not very granular, that they have few false sympliculse, and that there 

 is a false columella, produced by trabeculse from the septal ends. There are five cycles 

 of septa, a few orders of the sixth. 



Height of corallum 2 inches. 



Length of calice l^g inch ; breadth of calice -^ inch. 



Locality. Three miles west of Lynyan, Eanikot group. Survey-number G jj%*. 



Illustrations of the Species in Plate IV. 



Fig. 8. Side view of the coral. 

 9. The costse: magnified. 

 10. A transverse section of the coral : magnified. 



Genus PLOCOPHYLLIA, Beuss. 



1. Plocophtllia Sindiana, Duncan. Plate XIII, Figs. 1-3. 



This species is founded on a small massive corallum, with a few extremely large 

 corallites, separate above, short, and presenting some Heliastrsean peculiarities. There are 

 no Nummulites about the specimen ; and I have doubts, from its mineralization, whether 

 it really came from Jhirk : it looks more recent than the others from that spot. 



The corallum is broad above, small below, short, and massive. All the calices are 

 large, deep centrally, but shallow and expanded at the margins, which are oval or irregular 

 in outline. The costse are distinct above, project slightly, are unequal, and those of 

 one calice do not pass over to others. Possibly there are 144 or more subequal septa 

 in the calices ; they are thin, crowded, faintly dentate at the free edge, and a consider- 

 able number reach the large papillose columella, which is situated deeply. There 

 does not appear to have been any epitheca. 



The diameter of a calice is l-j^ inch. Depth of fossula -^ inch. 



Locality. Jhirk C?), Eanikot group. Survey-number G xf fa- 



Illustrations of the Species in Plate XIII. 



Fig. 1. The corallum : natural size. 



2. The costae : magnified. 



3. A septal edge : magnified. 



This species has the appearance of a short Plocophyllia, of the Plocophyllia- 

 gregaria, Eeuss, type from S. Giov. Ilarione. 



