240 ROBERTSON [332] 



Group ENTOPROCTA Nitsche. 



Family PEDICELLINID^E. 



PEDICELLINA Sars. 



PEDICELLINA NUTANS ( ?) Ballyell. 

 Pedicellina nutans HINCKS (*8o), p. 569, woodcut figs. 37, 38, 40. 



Habitat. On roots of hydroids and Bryozoa. 



Local distribution. Yakutat; Tomales Bay, California. 



Foreign distribution. Coast of England. 



This form is placed here provisionally. It conforms in general 

 with the diagnoses of Hincks and of Ehlers ('90). Tentacles possess 

 one characteristic, however, which is not mentioned by these writers. 

 They contain a yellowish-brown pigment which is very conspicuous, 

 at least after the animal is killed, and which is very persistent. It is 

 not destroyed even when the tissue is treated with the reagents necessary 

 for imbedding and staining. It seems to be lodged in the outer layer 

 of cells of the tentacles, and is not found in the lophophore nor in any 

 other part of the animal, so far as I have been able to observe. 



LIST OF SPECIES. 



CHEILOSTOMATA. 



Gemellaria loricata. Membranipora lineata. 



Menipea ternata. Membranipora unicornis. 

 Menipea ternata forma gracilis. Membranipora spinifera. 



Menipea erecta sp. nov. Membranipora sandalia sp.nov. 



Scrupocellaria scabra. Cribrilina annulata. 



Caber ea ellisii. Schizoporella biaperta. 



Bugula murrayana. Schizoporella hyalina. 



Bugula purpurotincta. Schizoporella insculpta. 



Bugula jlabellata. Myriozoum coar datum. 



Cellaria borealis. Myriozoum crustaceum. 



Flustra lichenoides sp. nov. Lepralia foliacea. 



Membranipora lacroixii. Smittia trispinosa. 



Membranipora membranacea. Cellepora incrassata. 



CYCLOSTOMATA. 



Crisia cornuta. Lichenopora verrucaria. 



Entalophora capitata. 



