BY R. VON LENDENFELD, PH.D. 321 



attains a height of 30 and a horizontal diameter of 60 mm. A 

 vertical section appears oval, a horizontal one circular. As stated 

 above no specimens have been seen by me with a Pseudosculum, 

 all are Auloplegmaforra. 



Color. 



Alive, in spirits and dry this sponge is gray. In the dry state 

 of a lighter hue than otherwise. In the intei'ior the color is a 

 little darker than on the surface. 



Surface. 



The surface is very similar to that of Aulena Villosa. The villi 

 are scattered and not disposed in lines. They are long and slender 

 and very close together, attaining a height of 2-3 mm., and a 

 diameter of 8-1-2 mm. They are on an average 1 mm., apart. 



Structure. 



The peculiarities of the internal structvire have been referred to 

 above in the diagnosis of the genus. The skeleton is very similar 

 to that of Halme and evidently our sponge in this respect forms a 

 connecting species between Aulena nigra and the Halme species. 



The structure of the sponge body, the development of diaphragm- 

 membranes in the vestibule, etc., on the other hand closely resemble 

 those structures in Aulena. The soft part and the histological 

 structure likewise resemble Aulena very closely. 



Geographical Distribution. 

 East Coast of Australia, Port Jackson (Von Lendenfeld). 



Bathymetrical Distribution. 

 20-40 metres. 



