274 



A section through the living sponge shows a rather compact 

 yellowish pareuchyme and a very thin , somewhat paler cortex. 

 On places where rauch dark pigment is present, the cortex has 

 a brown colour. If we cut longitudinally through one of the 

 procts , we see some rather wide main excurrent canals , which 

 terminate into one short canal the opening of which is the proct. 

 The stomas are easily seen with a pocket-lens, especially on the 

 dark places of the sponge-surface as they are surrounded by 

 an almost colourless wall. The small flagellated chambers com- 

 municate with narrow aphodi and prosodi, almost as in Synops. 

 In the neighbourhood of the chambers is the parenchyme granular. 



In the cortex we find some layers of spherules and here and 

 there a few asters. Then follow two to four layers of sterrasters ; 

 around a proct there are about eight such layers. 



The parenchymalia are chiefly represented by radiating bundies 

 of oxeas and dichotriaenes. In addition to these we find asters. 

 As is always the case in Geodidae we find also sterrasters in the 

 parenchyme , but these are probably formed there in order to be 

 transported afterwards to the cortex. 



Spicules. Oxea. Straight or somewhat curved , tapering gra- 

 dually towards their extremities. 



Strongyles and styles occur, but they are probably oxeas or 

 other spicules, which are stopped in their growth. 



Dichotriaene. Stout, rhabdome not very long. Deuterocladi gen- 

 erally longer than the procladi. Often some of the deuterocladi 

 are again bifurcated. 



Sterraster. Rather large, spherical or elliptical. 



Spherule. With short tubercules ; irregularly spherical. 



Aster. They are generally spherasters , with comparatively long 

 blunt or pointed actines. Sometimes transitions are met with to 

 plesiasters, oxyasters or even chiasters. 



The species was found between Capri and Naples, at about 

 150 or 200 meter. 



