184 MARINE BIOLOGY OF THE SUDANESE RED SEA. 
Grade HOMOCILA, Poléjae7’. 
Family CLATHRINID A, Minchin. 
CLATHRINA CORIACEA (Montagu). 
Synonymy :— 
1818. Spongia coriacea, Montagu (13). 
1842. Grantia coriacea, Johnston (10). 
1864, Leucosolenia coriacea, Bowerbank (1). 
1867. Leucosolenia coriacea, Gray (6). 
1872. Ascetta coriacea, Haeckel (8). 
1905. Leucosolenia coriacea, Dendy (3). 
There were two specimens in the collection, one from Agig Harbour in 
41 fathoms, one from off an Antipatharian growing on mud in 10 fathoms at 
Khor Ahullarnama. 
Distribution. Atlantic coasts of Hurope ; Great Britain ; Red Sea. 
CLATHRINA PRIMORDIALIS (Haeckel). 
Synonymy :— 
1871. Ascetta primordialis, Haeckel (8). 
One specimen only, from loose coral at the edge of the leeward reef of 
Tella Tella Kebira. 
Distribution. Cosmopolitan. 
CLATHRINA CANARIENSIS (I0klucho), var. CoMPACTA (Schujfner). 
Synonymy :— 
1868. Nardoa canariensis, Miklucho (11). 
1872. Ascaltis canariensis, Haeckel (8). 
1877. <Ascaltis compacta, Schuffner (16). 
1908. Leucosolena eanariensis, Thacker (18). 
The specimen is identical with the C. compacta described by Schuffner (16) 
from Mauritius, but this species cannot apparently be separated from 
C. canariensis, as all intermediate forms have been described by Thacker (18) 
from the Cape Verde Islands. 
Since, however, the variety here dealt with differs so much from the 
typical C. canariensis as described by Haeckel, it seems wise to designate it 
as a distinct variety. The single specimen in the collection was obtained 
from the shore at Suez. 
Distribution. Mauritius, Red Sea, Cape Verde. 
