332 



ROBERTSON 



Group ENTOPROCTA Nitsche. 



Family PEDICELLINIDM. \ 



PEDICELLINA Sars. 



PEDICELLINA NUTANS (?) Ballyell. 

 PedicelHna nutans Hincks ('8o), p. 569, woodcut figs. 37, 38, 40. 



Habitat. — On roots of hydroids and Bryozoa. 



Local distributiofi. — 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 veiy 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 eel la ria scabra. 



Caberea ellisii. 



£ugula THurrayana. 



Bugula purpurotincta. 



£ ugu la Jla b ella ta . 



Cellaria borealis. 



Elustra lichenoides sp. nov. 



Mejnbranipora lacroixii. 



Membranipora membranacea. 



Mejnbranipora lineata. 

 Menibrajiipora unicornis. 

 JMembranipora spinifera. 

 Membranipora sandalia sp.nov 

 Cribrilina anmilata. 

 Sch izoporella b iaperta , 

 Schizoporella hyalina. 

 Schizoporella insculpta. 

 Alyriozoujn coarctatutn. 

 Myriozoutn crustaceiim. 

 Lepralia foliacea. 

 Smittia trispinosa. 

 Cellepora ificrassata. 



CYCLOSTOMATA. 



Crisia cornuta. 

 Entalophora capitata. 



Lichenopora verrucaria. 



