ALCYONAEIA OF SIND. 45 



In the Sindian specimen the upper surface of the corallum is flat and covered with 

 calices about yq inch broad. The septa are crowded ; many reach the papillary costse 

 or have a palus before them; some, in rare instances, enter neighbouring calices. 

 The fossa is shallow, and the calicular margins are rather flat. 



Locality . Three miles south-west of Jhirk, Eanikot series. Survey-number G |-|t- 



Illustrations of the Species in Plate VII. 



Fig. 15. The corallum : natural size. 

 16. Some calices : magnified. 



Genus PIRONASTR^A. 



Pironastrsea, D'Aehiardi, Coralli eocen. di Friuli (Pisa, 1875). 



1. PmoNASTEJEA IiSTDiCA, Duncan. Plate VII, Figs. 17-19. 



The corallum is thin, flat, discoid, and the calices are in concentric series, each series 

 being represented by a slight swelling or outline which usually is marked by costse. The 

 calices are distinct as a rule, but sometimes are slightly confused ; they are small, and 

 the septo-costse join frequently before reaching the empty axial space. The costse are 

 subequal, bifurcate, and trifurcate, or are straight for some little distance. The septa 

 are also subequal and small. Eight or nine septa reach the axial space, and twenty- 

 four or more costo-septa enter into the calicular system. There is no columella. The 

 base is ringed with depressions and elevations, and is marked with very fine circular 

 costal strise. The epitheca exists, and synapticulse are numerous between the costse 

 inferiorly. 



Breadth of corallum (originally) 2^ inches ; thickness xo to ^ inch. 



Locality. South-west of Jhirk, Eanikot group. Survey-number G ff |. 



Illustrations of the Species in Plate VII. 



Fig. 17. The corallum. 



18. Calices : magnified. 



19. The base of the corallum : nat. size. Outline restored. 



The genus is represented by a discoid form, closely allied to Pironastroea Indica, 

 in the middle series of the Eocene of Friuli, where other Sindian species have been 

 discovered by D'Aehiardi. 



Genus EEUSSASTEJEA, D'Aehiardi. 



Prof. Antonio DAchiardi founded the genus Beussastrcea in memory of the 

 late illustrious zoophytologist, A. E. Eeuss. It includes Thamnastrceidce with a 

 lamellar columella. (' Coralli eocenici del Friuli,' Pisa, 1875, p. 67.) 



1. Eeussaste^a geandis, Duncan. Plate X, Figs. 1-4. 



The corallum is very large, thin, very short, rather irregular on the surface, sharp 

 at the edges, and covered with calices and costse above, and presenting costse on the 

 base, with slight evidence of epitheca. 



