R. W. H. ROW—REPORT ON THE SPONGES : NON-CALCAREA. 373 
The skeleton agrees closely with the original description, and is quite free 
from foreign bodies. 
Locality. The single specimen was obtained from the north-west of 
Condenser Island, Suakin Harbour. 
‘Distribution. Red Sea. 
Hircrnia RuGosA, Lendenfeld. 
Synonymy :— 
1889. Hircinia rugosa, Lendenfeld (20). 
This species is represented by three fragments of quite irregular shape, but 
which were probably all encrusting. No detinite external characters can be 
given, owing to their fragmentary condition. 
The colour of the specimens was greyish white, due to the presence of a 
dense sand-layer in the cortex. 
The whole skeleton consists of sand. There is an extremely dense dermal 
layer of sand varying, in different parts of the specimen, from 0°6 mm. to 
0-9 mm. thick. Further, the whole sponge is full of sand, in irregular bands 
and tracts which no longer possess the appearance of fibres. The grains of 
sand in these tracts are very dense towards the centre of the tract, but thin 
out somewhat towards its edge. Sand-grains are scattered thickly also 
between these tracts. 
No details of the canal-system could be made out. 
Locality. All the specimens were obtained from the north-west of Condenser 
Island, Suakin Harbour. 
Distribution. Red Sea, Australia. 
HIRCINIA FASCICULATA (sper). 
Synonymy :— 
1791. Spongia fasciculata, Esper (14). 
1889. Hircinia fasciculata, Lendenfeld (20). 
This species is represented by a single large fragment, which is only a 
portion of a specimen. It forms a large erect mass 100 mm. by 20 mm., and 
is 55 mm. high, but the external surface of the sponge is only visible over a 
very small portion of the specimen. Where it can be seen, however, it is 
covered with low conuli, 1 mm. to 1°5 mm. high, irregularly scattered over 
the surface at distances varying from 5 mm. to 15 mm. 
The colour of the specimen is deep brown in spirit. 
The skeleton agrees exactly with the original description. The trellis-like 
main fibres contain considerable quantities of foreign bodies, chiefly sand. 
Locality. The single specimen was obtained from the north-west of 
Condenser Island, Suakin Harbour. 
Distribution. Red Sea, Indian Ocean, Mediterranean. 
