110 A MONOGRAPH OF THE TERTIARY POLYZOA OE VICTORIA. 



erect in the central parts, smooth ; thyrostome snbcircular, with a conspicuous 

 rounded sinus in the lower lip ; the margins thick and tumid. 



M.C. 



I have great doubt whether this may not be really identical with C. costazei. 

 The specimens are all small. In some of the zooecia the peristome is a little more 

 prominent on each side ; there is, however, no appearance of avicularia in any of 

 the specimens. 



3. S. costazei, Audouin. 



Cellepora hassallii (Johnston), Busk, B.M.C., Pt. II., p. 86 ; C. costazei, 

 Hincks, B.M.P., 411; McG., P.Z.V., 148. 



Of this I have only two or three specimens too imperfect for description or 

 illustration, but still sufficient to leave no doubt of: the identification. 



B. ; M. A living Australian and European species. 



4. S. granum, Hincks. PI. XIV., fig. 14. 



Cellepora granum, Hincks, A.M.N.H., Aug., 1881 ; Busk, C.P., 205 ; Waters, 

 Q.J.G.S., 1883, p. 440 ; A.M.N.H., Sept., 1887. 



Zoarium small. Zooecia ovate, distinct at the margins, confused and erect in 

 the central parts ; thyrostome rounded, with a distinct narrow sinus in the lower 

 lip ; peristome produced above to form a lofty mucro having a small ovate avicu- 

 larium on the inner aspect at the apex, and rising on each side into a point. 

 Ocecium situated below the thyrostome, projecting, rounded, with a semicircular 

 space in front, bounded by a distinct border and traversed by converging grooves. 



M.C. (W.) ; B. Living. Australia. 



5. S. incus, n.sp. PI. XIV., fig. 15. 



Zoarium massive, lobed, in the specimen figured anvil-shaped. Zooecia con- 

 fused, indistinct, immersed, surface finely granular ; thyrostome opening straight 

 forwards, arched above, lower lip with a wide sinus, a sharp internal denticle on 

 each side ; scattered rounded avicularia, on elevations, intersjiersed among the 

 zooecia. 



S.P. 



There are specimens of several other species of Cellepora and Schisrnopora, but 

 in too imperfect a condition for certain identification or description in so difficult a 

 genus. Among them are, I believe, C. intermedia (McG.) and C. coronopus 

 (S. Wood). 



