ALCYONAEIA OF SIND. 55 



is slightly convex and has been pedunculate ; it is feebly epithecate. The margin is 

 slightly crested ; the calice is circular, subflexuous ; and the fossa is circular. The septa 

 are very numerous, even in the young form. 



Locality. Jhirk, in the Eanikot group. Survey-number G rf-js- 



Illustration of the Species in Plate XVI. 

 Fig. 11. The corallum, natural size, side view. 



9. Ctclolites striata, Duncan. Plate XVII, Figs. 7, 8. 



The corallum is circular in outline, nearly flat inferiorly, where the epitheca is 

 ringed concentrically, and very slightly convex above. The fossa is very small and rather 

 oval, and not very deep. The septa are exceedingly crowded and close, so as to present 

 the resemblance to a series of radial striations ; they are very thin, equal, excepting 

 the higher orders, close to the margin, and plain, and are about 360 in number. 



Height of coral slightly over ^o inch ; breadth of the base 1 inch. 



Locality. Jhirk, in the Eanikot group. Survey-number G fi 45- 



Illustrations of the Species in Plate XVII. 

 Fig. 7. Corallum from above : natural size. 



8. Part of the upper surface, near the edge : magnified. 



The presence of nine species of the genus Cyclolites, including the European 

 Cyclolites alfina and Cyclolites Altavillensis, in the lowest Tertiaries of Sind, is very 

 interesting, for it stamps the coral-fauna with an Eocene facies ; and this is rendered 

 most decided by the presence of some other species common in the Nummulitic strata 

 of Europe. 



Genus THAMNASTE^A, Lesauvage, amended. 



1. Thamnaste^a Balli, Duncan. Plate XIX, Figs. 1-3. 



The corallum when full-grown is very large, massive, convex above, fungiform, with 

 a low, broad stalk having a broad base. In young forms the coral is very convex above 

 and incrusting or concave below, and is thin. 



The convex upper surface is covered with vast numbers of very small, shallow 

 calices, connected by long and very converging, narrow linear costse. The small size of 

 the costse is very striking in relation to the great dimensions of the corallum ; and the 

 restricted calicular areas and very superficial and extremely shallow fossae are equally 

 characteristic. Some six or seven septa really touch the small rudimentary columella, 

 and each is formed by several septo-costse ; but they are all nearly equal in thickness, 

 and are not close. There may be from sixteen to thirty-six of these joining septa, all 

 being of different lengths and entering into the composition of other calices also. 

 The synapticulse are very numerous. 



In some parts of this remarkable coral the calices become elongate in one direction, 

 and a long septo-costate columella, joined by many septa, results. 



