234 ROBERTSON [3 2 6] 



Family CRIBRILINID^. 



CRIBRILINA Gray. 

 CRIBRILINA ANNULATA Fabricius. 



Cribrilina annnlata HINCKS ('80), pi. xxv, figs, n, 12. 

 Eschariporaannulata 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 fms. ; 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 ('67), pi. xxiv, figs. 70, 73. 



Hippothoa biaperta SMITT ('72), pi. vui, figs. 173-176. 



Habitat. On shells of brachiopods. 



Local distribution. Juneau ; Houston- Stewart Channel ; Virago 

 Sound, Queen Charlotte Islands. 



Foreign distribution. Spitzbergen; Greenland; Kara Sea; Flor- 

 ida. 



SCHIZOPORELLA HYALINA Linnaeus. 



Schizoporella hyalina HINCKS ('80), pi. xvm, 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 insculpta HINCKS ('83), pi. xvn, fig. 5. 



Habitat. On Alcyonidium mytili. 



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

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

 lands ; Vancouver Island ; Alki Point, Puget Sound. 



