ALCYONAEIA OF SIND. 97 



rudimentary. The septa, alternately large and small, are long, and the larger reach 

 furthest to the columellary line. The base is marked by fine costal striations, and the 

 synaptieulse are rare everywhere. 



The breadth of a coUine at its base is considerable, and from -^g to -^ inch. About 

 from 7 to 10 septa in xo inch. 



Locality. Maki Nai, in the Gaj series. Survey-number G -^. 



Illustrations of the Species in Plate XXIV. 



Fig. 7. A part of the corallum : natural size. 

 8. A part : magnified. 



2. Pachyseeis exaeata, Duncan. Plate XXIV, Figs. 5, 6. 



The corallum is very large, flat above and below, and the series are excessively long, 

 nearly straight, and rarely bifurcate. The valleys are wide, shallow, and unequal ; and 

 the collines are low, slightly oblique, broad at the base, and rounded where free. The 

 septa are close, crowded, narrow, and subequal on the collines, which they cross ; but 

 near the columella they become unequal and alternately large and small. The larger 

 septa reach the columella, expand parallel with it, and join it by means of delicate 

 trabeculse. The smaller septa become slender near the columella, and may or may not 

 reach it. In some parts smaller septa reach from the collines a little way into the 

 valley, and are placed between those already noticed. The columella is distinct, has a 

 lamellar tip which is not continuous, and in some places it is out of the axial line. The 

 synaptieulse are rare. 



The length of some series is considerably more than 6 inches ; some restricted 

 series are from J inch to 1 inch in length, and the majority are nearly parallel, slightly 

 wavy, and very long. The width of the valleys from the top of one coUine to that of 

 the other is from j inch to nearly ^ inch. The bases of the collines are from ^^ to 

 1% inch across. 



Locality. South of the Gaj river, in the Khirthar range, in the Gaj series. Survey- 

 number G ^-P. 



Illustrations of the Species in Plate XXIV. 



Fig. 5. The corallum : natural size. 



6. A portion : magnified. 



Genus CYCLOSERIS, M. Ed. & J. Haime. 



1. Ctcloseeis magnieica, Duncan, Ann. & Mag. Nat. Hist. 1864, xiii. p. 304. Plate 

 XXVI, Fig. 13. 

 The corallum is large, convex, irregularly rounded above, and trochoid, with a 

 small attachment below ; the wall is in longitudinal folds, which do not interfere with 

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

 HeliastrEean in its appearance. The calices are irregular in shape, and unequal in size 

 and depth, all being more or less open at the surface, and infundibuliform ; they are 







