INTRODUCTION. CXXXVU 



Family II. — Eiicratiidas. 



EucBATEA, Lamouroux. 

 Gemellaria, Savigny. 

 ScRUPARiA, Hincks. 



Huxleya, Dyster. 

 BrettiAj Dyster. 



Cellularia, Pallas. 

 MenipeAj Lamouroux 



Family III. — Cellulariidse. 



ScRUPOCELLARiA^ Van 



Beneden. 

 Caberea, Lamouroux. 



Family IV. — BicellariidsB. 



BicellariAj Blainville. 

 BuGULA, Okeu. 



BeaniAj Jolmston. 



Family Y. — NotamiidsB *. 

 NoTAMiAj Fleming. 



Family VI. — Cellariidse. 

 Cellaria, Lamouroux (part). 



- Family VII. — FlustridsB. 

 FlustrAj Linnseus. 



Family VIII. — Membraniporidae. 



MegaporAj Hincks. 



Membraxipora, Blain- 

 ville t. 



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

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

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

 higher group. Amongst the Euci-ciHidcB it is shared jby the genus 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 Ccllularina of Smitt; families 

 6-9, the Flustrina ; families 10-14, the Escharhia ; family 15, the Celle- 

 ■porina. The last group he has now abandoned. 



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

 considered doubtful. Its extraordinary larva (Plate LXXXIII. fig. 9) 

 allies it to Flustrella and (in some degree) to Eucratea. We are not in a 

 position as yet to determine its afBuities with precision. 



