896 THE HOMOC(ELA DESCRIBED FROM AUSTRALIA, 



THE HOMOCCELA HITHERTO DESCRIBED FROM AUS- 

 TRALIA AND THE NEW FAMILY HOMODERMID^. 



By R. v. Lexjjenfeld, Ph.D. 



THE HOMOCCELA. 



The simplest of all Sponges doubtlessly, are the AsconidiB and 

 the Physemaria. 



The Sponge nature of the latter however, is not sufficiently 

 acknowledged for them to be placed in the Class Spongise, and so 

 those Sponges appear as the least developed, which possess a 

 non-diflferentiated Entoderm, where flagellate cells cover the whole 

 of the Entodermal surface. 



I. SUBORDO HOMOCCELA. 



PolejaefF, 1884 (1.) 



THE WHOLE OF THE INNER SURFACE COVERED BY THE 

 SAME KIND OF FLAGELLATE CELLS, NO DIFFERENTIATION 

 OF THE ENTODERMAL EPITHELIUM. 



Polejaeff (I.e.) made this group, which I recognize here as a 

 Suborder for the Asconidge of Haeckel, because he justly con- 

 siders the Lenconidse, Syconidse and Carter's Teichonellidae much 

 nearer related to one another than to the Asconidae. 



(L) N. Polejaeff. Report on the Calcarea, Zoology of the Voyage of 

 H.M.S. Challenger. Part XXIV., p. 22. 



