10 IDMONEID^. 



cular. Branches arising very irregularly from one or more zoooecia 

 in each internode. Ovicell deeply immersed (a mere expansion of 

 one of the zoooecia). 



Crisia producta, Smitt, Scandiv. Jlafs-Bryoz. p. 116, pi. xvi. figs. 4, 5, 6. 

 Crisia ebiirnea (var.), Norman, Report on Shetland Dedging, p. 309. 



Hah. Coast of Norway (Smitt) ; Shetland (Norm.). 

 Probably only a variety of Crisidia cornula (vide Plate I. fig. 3). 

 It docs not appear to have any character in common with C. ehurnea. 



II. INARTICULATA. 



Zoarium contiinions throughout^ not divided into distinct 

 internodes ; fixed immovably by a contracted calcareous 

 base and erect, or immediately adnate upon foreign bodies 

 and recumbent in whole or in part. 



Centrifugines empales a cellules non operculees, D'Orb. Pal. 



Fran^. p. 605 (pars). 

 InarticulatjE s. adfixae, Busk, Manor/. Crag Pohjz. p. 93. 

 Incrustata, D'Orb. ; Smitt, I.e. p. 39."). 



A. ERECTjE. 

 Family II. IDMONEIDiE, Bk. 



Zoarium usually erect, simple or branched ; branches cylindrical, 

 subcylindrical, or triangular, free or anastomosing. 



Tubigeridse (pars), UOrh. I. c. p. G98. 



Tubuliporidse (pars), Johnst., Smitt. 



Les Tubuliporiens (pars), Milne-Edic. I. c. p.\14. 



Idmoueidfe, Bk. Crag Polyz. p. 94. 



Idmoneadse, Bk. Eng. Cyclopaedia, art. " Polyzoa." 



1. IDMONEA, Lamx. 



Zoarium ramose ; branches dichotomous or irregular, free or 

 anastomosing ; orifices of cells disposed in parallel or subparallel, 

 transverse or oblique, usually alternate rows on each side of the 

 front of the branches, which are usually triangular and flattened 

 behind. 



Idmonea, Lamx. Exp. Meth. p. 80; Def ranee ; BlainriUe; M.- 

 Edwards ; Johnston ; Lonsdale ; Perns ; Michelin ; Ilagenoic ; 

 nOrb. 18."52 (pars); Piimer (pars); Smitt (pars); Busk, I. c. 

 p. 104 : V. Bencden. 



