326 ROBERTSON 



Family CRIBRILINID^. 



CRIBRILINA Gray. 



CRIBRILINA ANNULATA Fabricius. 



Cribnlina anmilata Hincks ('80), pi. xxv, figs. 11, 12. 

 Escharipora annulaia Smitt ('67), pi. xxiv, figs. 8-10. 



Habitat. — A small colony growing upon an ascidian. 



Local distribution. — Yakutat. 



Foreign distribution. — Britain; Greenland; Nova Zembla ; Kara 

 Sea ; Hammerfest ; Spitzbergen, 3-30 f ms. ; Bergen ; Labrador ; 

 Grand Menan, Bay of Fundy ; Gulf of St. Lawrence. 



Family MTRIOZOID^. 



SCHIZOPORELLA Hincks. 



SCHIZOPORELLA BIAPERTA Michelin. 



Schizoporella biaperta Hincks ('80), pi. xl, figs. 7-9. 



Escharella linearis forma biaperta Smitt i^^l^, pi. xxiv, figs. 70, 73. 



Hippothoa biaperta Smitt ('72), pi. viii, figs. 173-176. 



Habitat. — On shells of brachiopods. 



Local distribiition. — Juneau; Houston-Stewart Channel; Virago 

 Sound, Queen Charlotte Islands. 



JForeign distribution. — Spitzbergen; Greenland; Kara Sea; Flor- 

 ida. 



SCHIZOPORELLA HYALINA Linnaeus. 



Schizoporella hyalina Hincks ('80), pi. xviii, figs. 8-10. 

 Mollia hyalina Smitt ('67), pi. xxv, fig. 84. 



Habitat. — On shells and on other Bryozoa. 



Local distribution. — Sitka; Juneau; Orca; Yakutat; Houston- 

 Stewart Channel; Virago Sound; Fort Point and Santa Cruz, Cali- 

 fornia. 



Foreign distribution. — Arctic seas ; Spitzbergen ; Greenland ; 

 Mediterranean; Africa; Australia. 



SCHIZOPORELLA INSCULPTA Hincks. 

 Schizoporella insctilpta Hincks ('83), pi. xvii, fig. 5. 



Habitat. — On Alcyonidiujn jnytili. 



Local distribution. — Sitka, both in the littoral region, and dredged 

 at 10 fms. ; Virago Sound, Cumshewa Harbor, Qiieen Charlotte Is- 

 lands; Vancouver Island; Alki Point, Puget Sound. 



