INTRODUCTION. CXXXV11 



Family II. Eucratiidae. 



EUCRATEA, Lamouroux. 

 (I I:\IF.LLARIA, Savigny. 

 SCRUPARIA, Hincks. 



HUXLEYA, Dyster. 

 BRETTIA, Dyster. 



Family III. Cellnlariidae. 



CELLULARIA, Pallas. 

 MENIPEA, Lamouroux. 



SCRUPOCELLARIA, Van 



Beneden. 

 CABEREA, Lamouroux. 



Family IV. Bicellariidse. 



BICELLARIA, Blainville. 

 BUGULA, Oken. 



BEANIA, Johnston. 



Family V. Notamiidae *. 

 NOTAMIA, Fleming. 



Family VI. Cellar iidaa. 

 CELLARIA, Lamouroux (part). 



Family VII. Flustridaa. 

 FLUSTRA, Linnaeus. 



Family VIII. Membraniporidae. 



MEMBRANIPORA, Blain- 

 villef. 



MEGAPORA, Hincks. 



the cells themselves are of a very different type in the two genera. The 

 Atteida- seem to be properly ranked as a family of the present suborder ; 

 their etoloniferous character is not sufficient to raise them to the rank of a 

 higher group. Amongst the Eucratiida it is shared t by the genu Eucratea, 

 but would certainly not warrant its separation from the forms with which 

 in other respects it is most closely allied. 



* Families 1 to 5 inclusive constitute the Cellularina of Smitt; families 

 (>-!, tlu> t'lu*trina ; families 10-14, the Kxharina ; family 15, the Celle- 

 porina. The last group he has now abandoned. 



t Membranipora pilosa. The systematic position of this species must be 

 considered doubtful. It extraordinary larva (Plato I. \\.\I 1 1. fig. 0) 

 nllio it to Flu,*h-flla and (in some degree) to Eucratea. We are not in a 

 position as yet tn determine iU affinities with precision. 



