118 



a small number (about 6) of uniporous rosette-plates, and the distal half of each 

 side-wall is furnished with a single one. 



No avicularia. 



The ooecia are large, strongly prominent, flatly arched, roughly radiately 

 striated on the frontal surface, with a varying number of large, cylindrical, club- 

 shaped, knotformed or pointed processes. Hi neks' statement on the oa-cia: 

 ^surface smooth, divided into distinct areas by raised partitions<, must refer to 

 these projections, which reach right out to the covering membrane of the ooecium. 

 The ooecia are borne by zooecia, which are furnished with a large operculum and 

 with two proximal spinous processes facing inwards, but they lack the denticles, which 

 otherwise occur on the frontal membrane. They are covered by kenozooccia, which 

 have no denticles, but are furnished with a narrow calcareous border just like the 

 ordinary zooecia, although this here does not reach right back proximally (fig. 

 10 b). The boundary between the kenozooecium and the ooecium-bearing zooecium, 

 is formed by a distal wall, strongly bent at an angle, which has a transverse belt 

 of scattered uniporous rosette-plates (10 d dw.), and which is furnished with a 

 thickened, strongly calcified distal margin. If we cut away the frontal wall of an 

 ooecium (fig. 10 e) we find outermost the narrow cavity of the kenozooecium, 

 within this the ooecium, and proximally to this the thickened margin of the 

 distal wall, behind which we can detect a number of rosette-plates. The keno- 

 zooecium is separated from the higher zooecium by a distal wall of the ordinary 

 structure (fig. 10 d). 



The colonies form dense, very often bifurcated tufts, the branches of which 

 have four rows of zowcia. 



Some colonies of this species from Port Phillip Heads, Victoria have been 

 kindly sent me by Miss Jelly. 



F. aculeata Busk. 



Catalogue of Marine Polyzoa, Cheilostomata, 



pag. 33, PI. 44, figs. 4, 5, PI. 45 (bis.) fig. 6. 



The zooecia hexagonally rectangular, a little within each lateral edge furnished 

 with a longitudinal row of 4 — 5, very often bifurcated, upwards bent, chitinous 

 denticles, and the distal margin of the zooecium is as a rule furnished with 

 2 — 4 similar, but smaller spine-like processes. The separating wails are as in the 

 prece^ding species. 



No avicularia. 



The ocecia have a similar shape and structure as in F. nnciiuitd, but lack 

 the numerous and strong processes, found in that species. On the other hand, 



