263 



reception of two species from Aldinga. His diagnosis of the 

 genus is very brief, and reads thus : — "Simple pedicellate corals 

 with endotheca and pali. No columella/'^ Woods is, how- 

 ever, mistaken in regard to the last statement, as there is a 

 decided columella in his type species, ('. laticostata. I col- 

 lected many examples of this some years ago at the Aldinga 

 section, and, though in some of them the columella is incon- 

 spicuous, being (probably worn away by fossilization, it can in 

 most jalices be plainly discerned as a styliform process. The 

 second species described by Woods, ('. tenuico^tata, belongs 

 doubtfully to the genus. The diagnosis of the genus is cor- 

 rected and amplified as follows: 



Genus Cyathosmilia, 1\ Woods [emend.). 



Corallum curved or almost straight, and usually long, cylin- 

 drical or slightly compressed, and pedicellate. Calice circu- 

 lar or elliptical. Septa in six systems with three cycles. Pali 

 in one crown. Columella essential and styliform. Costae 

 •covered by a complete epitheca. Endotheca fairly developed. 



Cyathosmilia velata, spec nov. 



PI. vi., figs. 4(7, h. 



Corallum tall, horn-sharped, and usually slightly tapering to 

 its pedicellate base, where the scar of former attachment is fre- 

 quently preserved. The specimens are fairly uniform in shape, 

 but a few are elliptical in transverse sections, while the majo- 

 rity are circular or nearly so. Occasionally the corallum bears 

 just a perceptible crest at the outer edge of the curve. Calice 

 of moderate depth and either circular (as in type) or slightly 

 elli,ptical. The primary septa are rather longer than the 

 secondaries, but otherwise equal ; tertiaries much smaller. At 

 the surface all are slender, especially the tertiaries, but the first 

 two orders increase in thickness downwards. Pali six in num- 

 ber, elongate, and before the secondary septa. The columella 

 is superiorly sometimes a single, sometimes a double style. It 

 is generally connected with the pali by endotheca, which is 

 fairly abundant in the central fossa. There is also, more or 

 less endotheca at the margin of the calice and between the septa. 

 In the above description of the calicular structure the type and 

 a younger specimen are especially indicated. My collection 

 contains numerous individuals, but mth the exception of these 

 two, the upper fragile portion of the calice has been worn away. 



*0n some Fossil Corals from Aldinga. Phil. Soc, Sth. Austr., vol. I., 

 p. 113. 



