ON SOME SOUTH AUSTRALIAN POLYZOA. 



By F. W. Hutton, Esq., F.G.S., Director of the 

 Otago Museum, Dunedin. 



[Bead 13^ March, 1877.] 



The following is a list of some of the polyzoa collected at 

 odd times by Professor Ralph Tate, Hon. Mem. Roy. Soc, 

 Tasmania, on the shores of St. Vincent's Gulf. The great 

 interest of several of the new species here described promises 

 an ample reward to any one who will make a systematic 

 search for them. 

 Caberea rudis. Busk, Cat. Mar. Polyz. Brit Mus. Cat, L,p. 38. 



The South Australian specimen differs from the description 

 of Mr. Busk's, in having the setae long and serrated ; if this 

 be constant it might perhaps be used as a specific character. 

 The type specimens are from Bass' Straits. 



Membkanipora lacroixi. Savigny ; Busk. loc. cit , p. 60. 

 Membranipora (?) cincta. Spec. nov. 



Zoarium encasing stems of algae. Cells quadrangular 

 arranged transversely in rings ; lamina punctured ; orifice 

 sub-orbicular, with a rounded, generally brownish, tubercle on 

 each side ; a broad flattened incurving process at the lower 

 angle of each cell. 



A most remarkable form, which from the exact regularity in 

 the disposition of the cells, ought perhaps to be made the type 

 of a new genius. 



Lepralia CANDIDA. MacGilUvray, Tram. Phil. Inst.y 



Victoria, IV., p. 98. 



Lepralia elegans. MacGilUvray, loc. cit, p. 166. 



Lepralia tatei. Spec. nov. 



Cells irregular, subvertical smooth, strengthened by radiating 

 ridges of which there are always three in front, including be- 

 tween them two large oval vacuities ; orifice sub-orbicular 

 with a long projecting rostrum below ; a small raised cylin- 

 drical avicularium occasionally on one or both sides of the 

 mouth. 



A very distinct form belonging to the same group as L. 

 Candida. 



Lepralia spicea. Spec. nov. 



Cells cylindrical, sub-erect, areolated; walls thin, hyaline 

 orifice orbicular; lower lip produced into a long acuminate 



