Polyzoa of Queen Charlotte Is/ands. 25 



the oral avicularium, which I have not noticed on Australian 

 specimens. The cell- wall is smooth and entire ; the ooecium 

 is traversed bj delicate radiating lines. 



Extremely common, on shells &c. 



[Victoria [MacGillivray) ; Bass's Straits {Capt. Cawne 

 Warren) .] 



The species described by ]\Ir. Ridley from the Straits of 

 Magellan (Proc. Zool, Soc. Jan. 4, 1881) as SchizojwreUa 

 marsupium, and identified by him with MacGillivray's Le- 

 pralia marsupium^ is, I have no doubt, the EscJiarina .simplex 

 of D'Orbigny ('Voyage dans I'Am^rique Merid.'), obtained 

 from " les lies Malouines." ]\IacGillivray, who has found this 

 species in Victoria, has named it Schizoporella Ridley i (Proc. 

 Koy. Soc. Victoria, Oct. 12, 1882). 



We have no alternative, however, but to revert to the earlier 

 designation, and it must stand as Schizoporella simplex^ 

 D'Orb. 



Porella major ^ n. sp. (PL IV. fig. 5.) 



Zooecia ovate or (sometimes) hexagonal, somewhat elongate, 

 quincuncial, rather depressed, sutures shallow, often with a 

 line of punctures round the margin ; surface smooth or slightly 

 roughened, glossy j orifice arched above, lower margin curved 

 inwards, so as almost to appear dentate ; peristome thin, un- 

 armed, elevated (in the adult cell), especially above, immedi- 

 ately below the orifice a narrow avicularian swelling, stretching 

 across the front of the cell and bearing in the centre a small 

 oval avicularium, mandible directed downwards. Owcium 

 rounded, moderately prominent, surface minutely roughened, 

 the peristome forming a raised rim round the oral arch. 



Zoarium of a very light brownish colour. 



Cumshewa ; Houston-Stewart Channel, common on shells. 



Smittia, Hincks. 

 Smittia trisjjinosay Johnston. 

 Houston- Stewart Channel ; off Cumshewa; Virago Sound : 

 abundant. 



[Britain, Norway, Arctic regions, St. Lawrence, Mingan 

 Islands, Florida, Mazatlan, Cape Horn, Aden, Adriatic, 

 East Indies {Dr. Anderson), Bass's Straits.] 



Several varieties occur. As a rule, the avicularian appen- 

 dages are present in great profusion and of unusual size. 



Smittia plicata, Smitt. 



Houston- Stewart Channel ; off Cumshewa, 20 fms. : not un- 

 common. 



d 



