ALCYONAEIA OF SIND. 53 



epitheca with bourrelets. The upper surface is slightly convex and has a small 

 circular fossa. The septa are unequal, close, about 280 in number, thicker near the 

 fossa than elsewhere, and the free surfaces of all are distinctly ornamented with a flat 

 crenulation, the lines of which are across the septa, making a great number of rectan- 

 gular, square, and irregular markings. The septa pass deeply down the sides of 

 the fossa. 



The height of the coral is under ys inch, and the breadth is yq inch. 



The locality whence this fossil was derived is the hills east of Lynyan, in the 

 Ranikot group. Survey-number G -f-ff- 



Illustrations of the Species in Plate XVII. 

 Fig. 3. The coral, side view: magnified. 



4. A portion of the calicular part : magnified. 



4. Cyclolites Vicarti, Haime. Plate XVII, Figs. 1, 2. 



This was the only Cyclolite described by D'Archiac and Haime (op. cit. p. 192) ; 

 and the following is the diagnosis : — 



The corallum is circular in outline and short ; the inferior face is concave and 

 covered with a well-developed epitheca, marked with slight concentric " bourrelets " and 

 having a slight median projection. The upper surface is slightly convex, with a shallow, 

 circular central fossa. There appear to be six cycles of septa complete ; all the septa 

 are very close, very thin, straight, and subequal. The height is less than J inch and the 

 diameter about f inch. 



In the magnified view of the calicular surface (plate xii, fig. 8 b) D'Archiac and 

 Haime indicate a moniliform condition of the free edges of the larger septa, and 

 that whilst the majority of the septa do not reach more than halfway to the central 

 fossa, a number of systems do, and that they consist of two larger septa with three 

 smaller between them, and of these three the central one alone passes to the fossa. 

 These are important additions to the diagnosis, especially when at least eight other forms 

 of closely allied Cyclolites are found in Sind. 



In the two specimens collected by the Indian Geological Survey from three miles 

 west of Lynyan, Ranikot group (Survey-number \ \ "«) , the breadth is greater than in the 

 type in one, and the height in relation to the proper breadth is less in the other. The 

 general septal arrangement is seen, and the faint crenulation and beading of the larger 

 septa also ; but the smaller septa have minute tubercles on them. The synapticulae are 

 well seen, and in one specimen some of the largest septa meet on the floor of the fossa. 



Specimen 1. Breadth f inch, height rather less than J inch. 



Specimen 2. Breadth I^-q inch, height ^ inch. 



Illustrations of tJie Species in Plate XVII. 

 Fig. 1. Side view of the corallum: magnified. 

 2. The septa: magnified. 



