1090 A MONOGRAPH OF THE AUSTRALIAN SPONGES, 



which possesses triradiate spicules only, scattered throughout the 

 Mesoderm which is exceptionally rich in cells. Tangental multi- 

 polar tissue cells and glandcells are met with. The spicules have 

 one longer ray mostly pointing towards the aboral pole. The 

 longitudinal ra} measures 0-074 — O'll x 0-0074 ; and the paired 

 rays 0-056—0-0074 x 0-004—0-006 mm. The three angles are 

 equal. Height 3 to 7 mm, breadth 3 to 4 mm. Peduncle half as 

 long as the body. 



Locality : East Coast of Australia, Port Jackson, Laminaria 

 zone, Von Lendenfeld. 



II.— SUBORDO HETEROCOELA. 



Von Lendenfeld. 



Calcispongise with differentiated Entoderm. Ciliated chambers 

 clothed with frilled flagellate cells are always present. The gastral 

 cavity is clothed with entodei'mal pavement cells. 



I adopt Polejaeffs (1) name with a different definition but 

 nearly identical meaning. 



1. FAMILY. SYCONID^. Glaus (2). 



Heterocoela with cylindrical ciliated chambers which traverse the 

 body-wall, are situated radially, and open direct into the gastral 

 cavity. Sensitive cells around the inhalent poi'es. Identical with 

 Haeckel's (3) Sycones. 



Connected with Asconidse by Homoderma and with Leuconidae 

 by Vosmaeria 



1. SUB-FAMILY. SYCONIN^. Von Lendenfeld. 



Syconidse with unbranched distally separate ciliated tubes, and 

 without complicated canal system. (Subgenera with the end 

 syllable " aga " of Haeckel (4.) 



(1.) N. PoUjaeff. L.c P. 39. 



(2.) C. Claus. Grundztige der Zoologie. Vierte Auflage. Band I , 

 Seite 221. 



(3.) E. Baed-el L.c. Band IL, Seite 232. 

 (4.) E. Haeckel. L.c. Band II. 



