450 On the Polyzoa of Queen Charlotte Islands. 



S. jissa, Busk (Britain and Mediterranean), and S. divisa, 

 Norman (Britain). I have only noticed obscure traces of 

 marginal spines, which constitute a very striking character 

 in the British forms. 



Hippothoa, Lamouroux. 



Hippothoa expansa, Dawson. 



Common on shells ; Houston Stewart Channel. [Shetland, 

 Gulf of St. Lawrence, Davis Straits.] 



f 



Hippothoa distanSj MacGillivray. 



Cumshewa ; Houston Stewart Channel. [Britain, Medi- 

 terranean, Singapore, Australia.] 



Myriozoum, Donati. 



Myriozoum coarctation, Sars. 



Cumshewa; Houston Stewart Channel, 15-20 fms. ; abun- 

 dant and fine. [Vancouver Island, Campbell Island (British 

 Columbia), Arctic seas, Norway.] 



Family Escharidse (part.), Smitt. 

 Lepralia (part.) , Johnston. 



Lepralia nitescens, n. sp. (PL XVIII. fig. 6.) 



Zocecia quincuncial, short-ovate, very ventricose; surface 

 dense, vitreous, highly polished and glistening, smooth, with 

 obscure radiating ridges, punctured, sometimes areolated round 

 the margin: orifice much higher than broad, immersed in the 

 older cells, arched above, slightly contracted a short way above 

 the lower margin, which is a little curved outward; peri- 

 stome not raised, the inner edge of the oral aperture finely 

 denticulate, 3 or 4 spines above ; on each side, in a line with 

 the lower margin, a strong nodulous process ; about the centre 

 of the margin an avicularium, with rounded mandible, placed 

 on a swelling, which extends some way down the cell, and 

 facing sideways, mandible directed upwards ; often on the 

 front of the cell near the bottom (towards one side) a bracket- 

 like projection, bearing a rounded avicularium. Ocecium (?). 



Zoarium forming a brownish patch on shells. 



Houston Stewart Channel; Cumshewa; Virago Sound 

 (probably). 



