214 



can still be seen. A transverse section of another example" 

 shows a large columella, almost solid, and fused with the prin- 

 cipal septa. 



The wall is stout, and is furnished with a shining epitheca, 

 delicate superiorly, but both thicker and rougher towards the 

 base. Apiparently it wears away easily, as only half of the 

 type corallum is now covered by epitheca, and the other twO' 

 specimens collected have none. The costae, which coiTespond 

 to the septa, are equal, closely set, and in the upper half 

 of the corallum faintly visible beneath the epitheca. Where- 

 this is wanting they can be traced almost or quite to the base, 

 and near the calice become comparatively prominent. 



The dimensions of the type are : — Height of corallum, 9 

 mm. ; length of calicei, 4.5 mm. ; breadth of calice, 3.5 mm. 



Loccdity, c£'c. — Rare in the Eocene of Brown's Creek. 



Genus Pleueopodia, nov. 



Corallum simple, cylindrical, ultimately free, with ju 

 rounded, costulate base. Gemmation occurs from the wall 

 and probably also from a strobila or nurse-stock. The calice 

 is circular and shallow. Seipta moderate in number, subequal, 

 dentate, and granulose. There are prominent pali and a 

 papillary or fascicular columella. Costae distinct, but int-er- 

 rupted by collarettes of epitheca. Endotheca scanty. 



This genus is formed to receive a single species of small 

 corals collected chiefly in the Cape Otway beds. By their 

 calices they are allied to Cladocora, but with a single excep- 

 tion, where a lateral bud is attached to the wall, the coralla 

 are free. In on© individual (pi. ii., fig. 4c), a central con- 

 striction of the corallum strongly suggests strobilation or 

 growth followed by separation from a strobila or nurse-stock, 

 as observed by various authors in Fungia.''" Moreover, several 

 of the young siibdiscoid forms in the collection resemble the 

 superior half of this corallum, and it is at least probable that 

 they are detached buds from a iparent stock. At the same 

 time there are also a few long cylindrical coralla, with a simi- 

 lar costulate base, but not showing signs of division. 



Pleupopodia Otway en sis, spec. nov. Pi. ii., figs. 4a, 6, c, d. 

 The corallum varies in height from almost discoid to tall, 

 the latter forms being sometimes slightly bent. The base is 

 generally tumid, and invariably costulate. The unique 

 exa.mple from the Adelaide bore has a minute fragment of 

 rock adhering to part of the base, but the usual costulations 

 are well marked on the free portion.. 



* Bourne terms the parent in Fungia a nurse-stock. Q.J. Micro, Sci. 

 vol. XXVII., n.s., p. 29i, 



