896 THE IIOMOCCELA DESCRIBED FROM AUSTRALIA, 



THE HOMOCCELA HITHERTO DESCRIBED FROM AUS- 

 TRALIA AND THE NEW FAMILY HOMODERMID^E. 



By R. v. LenjjEnfeld, Ph.D. 



THE HOMOCCELA. 



The simplest of all Sponges doubtlessly, are the Asconidaa and 

 the Physeinaria. 



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-differentiated Entoderm, where flagellate cells cover the whole 

 of the Entodermal surface. 



I. SUBOKDO 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 Asconidae of Haeckel, because he justly con- 

 siders the Lenconidse, Syconidse and Carter's Teichonellidse much 

 nearer related to one another than to the Asconidae. 



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

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



