378 MARINE BIOLOGY OF THE SUDANESE RED SEA. 
appearance, and the sponge-tissues are mere thin membranes covering and 
uniting the fibres of the skeleton. 
The colour in spirit is greyish black. 
Locality. Attached to a dead pearl-shell, Khor Dongonab. 
Distribution. Red Sea, Mediterranean, Indian Ocean, Pacific Ocean. 
PHYLLOSPONGIA MADAGASCARIENSIS (/Zyatt). 
Synonymy :— 
1877. Carteriospongia madagascariensis, Hyatt (16). 
1884. Phyllospongia madagascariensis, Ridley (23). 
There are four specimens of this species in the collection. Hach consists 
of a delicate mass of lamellee arising from a common base. Three of the 
specimens are rather irregular in shape, but the fourth possesses the typical 
flower shape, being circular with the lamellee arranged concentrically instead 
of parallel, and the largest lamellz are in the centre, and the smallest outside. 
The complete specimen measures about 75 mm. in diameter and 30 mm. high. 
The average diameter of the individual lamellze is 1:0 mm. to 1°5 mm.,.but a 
few reach 2:0 mm. in thickness. 
The surface of the lamellee is quite smooth. 
The colour in spirit is dall brownish white. 
The dermis is covered with minute sand-grains, but not thickly. 
The fibres are similar to Hyatt’s description; their diameter is 
0-07 mm. 
Locality. One specimen from Khor Dongonab, three from Suakin 
Harbour. 
Distribution. Red Sea, East African region. 
PHYLLOSPONGIA CORDIFOLIA (Kellez). 
Synonymy :— 
1889. Carteriospongia cordifola, Keller (18). 
A single large specimen growing on a piece of coral. It consists of a 
considerable number of lamellee, which stand erect and form a dense, rather 
irregular mass. The lamellee are mostly rather deeply and irregularly 
palmatifid ; but these divisions apparently do not indicate incipient branching, 
but only a permanently lobed condition of the lamella. 
The sponge is 110 mm. high from the base to the top of the tallest lamella, 
and about 70 mm. wide. The lamellee are 1°5 mm. thick. 
The surface is covered with very minute spines, 0°2 mm. high and 2 mm. 
apart. 
The colour is dull yellowish white. 
