574 Canon A. M. Norman — Notes on the 



reticulata, and many of their allies which I have examined. 

 The absence of the complete bar seems therefore to be 

 nearly general among the Membraniporidse, but to occur 

 also in some other instances. The interest of this question 

 lies in affording evidence that not only the presence or 

 absence of avicularia, or their general form when present, is 

 worthy of consideration, but even such minute points in 

 regard to the building up of the avicularium itself as this 

 little slender bar. 



But the bar is not always incomplete among what have 

 been called Membraniporidse. It would seem that in cases 

 when the oval or oblon^r avicularium occupies a distinct 

 chamber apart from the zooecium the bar is complete ; this 

 is the case in OochUina crassimarginata and teasa and 

 Lernacicus curniger. 



Class POLYZOA. 

 Subclass I. ENTOPROCTA. 

 Genus Loxosoma, Keferstein. 



1. Loxosoma phascolosomatum, C. Vogt. 

 Bog Fiord on Phascolion. 



Genus PehicellinAj M. Sars. 



2. Pedicellina cernua (Pallas). 



Var. helgica, J. van Beneden, = var. glabra, Hincks. 



The smooth-stemmed variety of P. cernua was taken 

 between tide-marks at Vadso. 



Subclass II. ECTOPROCTA. 



Order GYMNOL^MATA. 



Suborder I. C v c l o s t o m a t a. 



Genus Crisia, Lamouroux. 



3. Crisia denticulata (Lamarck). 



Varanger Fiord down to 150 fathoms ; and also in Bog and 

 Lang Fiords ; and it was dredged by the Norwegian North 

 Atlantic Expedition off Vardo in 148 fathoms. 



4. Crisia e^urnea (Linne). 

 Between tide-marks at Vadso. 



