32 THE FOSSIL COEALS AND 



concentric rings of epitheca, and a vast number of subequal radiating costse, \yhose course 

 is often much broken by the circular layers of epitheca. The costal appearance is 

 produced by a broad rounded and often ornamented epithecate process, which covers 

 each small costa from the outside calices. 



The central projection on top of the corallum consists of a mass of calices and 

 columns. The septa of the calices are not arranged in definite cycles. 



The breadth of the base is 3| inches ; the height of the corallum to the base of 

 the projection is l^^j inch, and this eminence brings the height to i-^ inch. 



The calices are -j^ to -^ inch and slightly more in diameter : and the large columns 

 may reach ^ inch in height ; their usual height is about ^ inch. 



Locality. Jhirk, from the lowest fossiliferous bed, Eanikot group. Survey-number 

 n S.S.Q. 



'J 124- 



Illustrations of the Species in Plate XII. 

 Fig. 1. The upper part of the corallum : natural size. 



2. Part of the base : magnified. 



3. A large pillar : magnified, side view. 



4. A calice : magnified. 

 4ffl. Side view of a section. 



5. The top of a column : magnified. 



This remarkable coral is common, and always assumes the same shape. It is allied 

 to Stylocoenia macrostyla, Eeuss, from the strata near S. Giov. Ilarione, in the Bolca 

 and Montebello district of the Alps, and which is found with Cerithium giganteum and 

 Nummulites planulatus. The especial point of interest in the species is the gigantic 

 development of the small projections seen in some of the ordinary European Eocene 

 Styloccenioe. 



Stylocoestia maxima, Duncan. Plate XII, Fig. 6. 



A young specimen, with the same kind of base, calicular marginal lines, and septa 

 as the type, has only the usual upward enlargement of the calicular meeting-points. 

 Indications of a commencing central projection exist. It may be mistaken for Stylo- 

 coenia emarciata, Lamk. sp., of the European Eocene deposits. 



Illustration in Plate XII. 

 Fig. 6. The corallum : natural size. 



2. Styloccenia Vicaeyi, Haime. Plate XIII, Figs. 4-7. 



This Stylocoenian was described by DArchiac & Haime in their great work, 

 ' Les Animaux Fossiles du groupe Nummulitique de I'lnde,' and was figured by them 

 (plate xii, fig. 4, 4 h, p. 189). They notice the similarity of the species with those from 

 La Palarea in the European Nummulitic strata, and classify the form amongst the Sty- 

 locoenice with three cycles of septa, noticing that the primaries alone reach the columella, 

 which is rather large and cylindrical, that the secondaries do not reach the columella, 

 and that the tertiaries are rudimentary. They give the diameter of the calice as 

 1^ millim. They describe the corallum as thick and semiglobular ; and Haime and 

 Milne Edwards state it to be hemispherical. 



