Rev. T. Ilincks on Marine Polyzoa. 193 





* 



XX VIII. — Contributions towards a General History of the 

 Marine Polyzoa. By the Rev. THOMAS HlNCKS, B.A., 



F.R.S. 



[Continued from vol. x, p. 170.] 



[Plates VI. & VII. 1 



XL FOREIGN CHEILOSTOMATA (Australia and 



New Zealand) . 



Family Cellular iidae. 

 Scrtjpocellaria, Van Beneden. 



Scrupocellaria obtecta, Haswell. (PI. VI. fig. 1.) 



Zoarium of very stout habit, irregularly branched ; inter- 

 nodes of moderate length, containing 7-9 cells. Zocecia in 

 two lines, alternate, rather short, broad above, narrowing 

 downward ; area oval, occupying about two thirds of the 

 front ; margin well raised, thin, a stout spine on eacli side a 

 little below the top (one close to the avicularium y the other a 

 little above the peduncle of the operculum) ; a large oblong 

 shield-like operculum completely covering the area, surface 

 smooth and glossy, with a bilobate hand-like pattern upon it, 

 formed by a system of branching canals ; peduncle broad ; 

 lateral avicularium usually small, with pointed mandible, 

 occasionally much elongated, elevated, directed upward in 

 the line of the cells, the mandible large, expanded towards the 

 free extremity, which is carried out into a rather long slender 

 spinous process, flanked by a shorter denticle on each side ; 

 just below the area a small, much raised avicularium, with 

 pointed mandible directed obliquely downwards ; vibracular 

 cell erect, broad and rounded below, rising into a point above, 

 the groove (beak) sloping downward from the summit to 

 about the middle of the cell, the lower portion occupied by a 

 very large foramen for the radical fibre, which is furnished 

 with hooks ; seta rather long, occasionally of enormous length 

 (about twice the ordinary size). Ooecium (?). 



Loc. Queensland {Haswell) ) Port Phillip Heads {J. Brace- 

 bridge Wilson). 



I presume that this is the S. obtecta of Haswell, though his 

 brief diagnosis, unaccompanied by a figure, is hardly suffi- 

 cient for certain identification. 



It is a fine handsome species, of robust habit, the large 

 figured operculum forming a remarkable feature. A modifi- 

 cation of the lateral avicularium, similar to that which I have 





