240 



ROBERTSON 



[332] 



Group ENTOPROCTA Nitsche. 



Family PEDICELLINID^E. 



PEDICELLINA Sars. 



PEDICELLINA NUTANS ( ?) Ballyell. 

 Pedicellina nutans HINCKS ('80), 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. 



Menipea ternata. 



Menipea ternata forma gracilis. 



Menipea erecta sp. nov. 



Scrupo cellar ia scabra. 



Caberea ellisii. 



Bugula murrayana. 



Bugula purpurotincta. 



Bugula Jlabellata. 



Cellaria borealis. 



Flustra lichenoides sp. nov. 



Membranipora lacroixii. 



Membranipora membranacea. 



Membranipora lineata. 

 Membranipora unicornis. 

 Membranipora spinifera. 

 Membranipora sandalia sp.nov. 

 Cribrilina annulata. 

 Sch izoporella b taper t a . 

 Schizoporella hyalina. 

 Schizoporetta insculpta. 

 Myriozoum coarctatum. 

 Myriozoum crustaceum. 

 Lepralia foliacea. 

 Smittia trispinosa. 

 Cellepora incrassata. 



CYCLOSTOMATA. 



Crisia cornuta. 

 Entalophora capitata. 



Lichenopora verrucaria. 



