60 THE FOSSIL COEALS AND 



costse are well seen; they are sharply granular laterally, and not very unequal in size. 

 The smaller turn over the upper edge of the margin, and correspond with small septa 

 which do not reach far inwards. 



The calice, widely open, is crowded with septa and pali very closely placed^ The septa 

 are thin, moniliform from ornamentation at the edge, and unequal in length. There are 

 five cycles, and all the orders except the highest have pali. Th'e principal cycles are 

 equal, but the primaries and secondaries have not the largest pali, and do not correspond 

 with the largest costse. The largest pali are long, stout, low, arched, and are higher than 

 the septa, and they reach far towards the margin ; the others are elongate ovals in shape. 



The sides of the septa are granular. The axial space is circular in outline, 

 moderately deep, and there is no columella. 



The height of the coral is ^o inch, and the breadth of the calice is rather more 

 than -^Q inch. 



In some of the corals the epitheca is dense, and the basal surface is concave, and 

 the whole is not so bulky as in the type. 



Locality. Gagar hill, east of Surjana, Khirthar group. Survey-number G fxf • 



Illustrations of the Species in Plate IV. 

 Fig. 1. The base of the coral : natural size. 



2. The base : magnified. 



3. The calice : magnified. 



Genus LEPTOCYATHUS, M. Ed. & J. H. 



Leptocyathus, M. Ed. Sf J. H., op. cit. vol. ii. p. 80. 



1. Leptocyathus epithecata, Duncan. Plate IV, Figs. 4-7. 



The corallum is discoid, flat beneath, swollen at the margin, and with a sunken 

 central fossa. Frequently attached to a Nummulite, the base is marked with linear 

 costse, and usually three small ones are placed between a pair of long ones, all being 

 more or less masked by a pellicular epitheca which reaches to the edge of the calice ; 

 there the costse project rather unequally, the primaries and secondaries being the most 

 prominent. As they form the flank of the coral they become arched, distinct, granular, 

 and preserve their arrangement in size. The septa correspond with the costse, and the 

 larger are exsert, arched above, very granular laterally, and long; they pass down- 

 wards, diminishing in size, to the axial space, where small broken-granular-looking pali 

 terminate them and merge into a central columella. The middle septum of the three 

 smaller between the pair of larger septa reaches far towards the centre, and the others 

 less so, and the larger only have pali. The smaller series are not so high or arched ; but 

 all are granular laterally, and in some places the granules unite, simulating synapticulse. 



Height of the coral ys inch. Breadth of calice yo inch and less. 



Locality. Gagar hill, Khirthar series. Survey-number G ff f . 



Illustrations of the Species in Plate IV. 

 Fig. 4. The base : natural size. 

 5. Ditto: magnified. 



