902 THE HOMOCCELA DESCRIBED FROM AUSTRALIA, 



Agassiz) ; East Coast of Greenland (North Shannon, Pansah.) 

 Australia (163 A, off Port Jackson, depth 30-35 fathoms, bottom, 

 rock, Challenger. 



3. GENUS. ASCANDRA. Haeckel. 

 Asconidos with acerate triradiate and quadriradiate spicules. 



5. SPECIES. ASCANDRA DENS A. E. Haeckel. 



Tarrus densus. E. Haeckel. 



Prodromus eines Systems der Kalkschwamme. Jenaische 

 Zeitschrift fur Medicin und Naturwissenschaft. Band 

 V., Heft 2, p. 244. 



Nardopsis gracilis. E. Haeckel. 



Prodromus I.e., p. 247. 

 Ascandra densa. E. Haeckel. 



Die Kalkschwamme. Eine Monographie. Band II., 



p. 85. 

 Triradiate and quadriradiate spicules regular of equal size. All 

 the rays straight and pointed, cylindrical ; apical ray half as thick, 

 straight. Acerate spicule straight, truncate at both ends ; the 

 exterior end thickened, club-shaped, three to four times as long 

 and five to six times as thick as the rays of the triradiate spicules. 



Colonies consisting of entwined tubes, 8 — 10 mm. in diameter 

 in Auloplegma-form or with a pi'oboscis to the mouth. 



Skeleton : The greater number of spicules ai - e triradiate and 

 regular. The rays measure 0-1— 0-12 x 0-006— 0-008 mm. 



The quadriradiate spicules are few in number, and of the same 

 size and shape as the triradiate spicules, regular with slender rays. 



The ;<cerate spicules are large, 0-5 — 0-6 x 0-03 — 0-04 mm., and 

 protrude from the outer surface their distal ends are thickened, 

 club-shaped, and rounded. 



Special description and figures in Haeckel (I.e. Monographie.) 



Colour : (Di'ied) white. 



Locality : South Coast of Australia (Glenelg 1 Schomburgk.) 



