R. W. H. ROW—REPORT ON THE SPONGES: NON-CALCAREA. 305 
LAXOSUBERITES sp. 
A single very much dilapidated specimen, apparently belonging to this 
genus, was obtained. 
Locality. Suez. 
PSEUDOSUBERITES HYALINUS (Ridley 5° Dendy). 
Synonymy :— 
1887. Hymeniacidon hyalina, Ridley & Dendy (24). 
1900. Pseudosuberites hyalinus, Topsent (34). With complete synonymy. 
A single very ragged specimen occurs in the collection which has been 
assigned to this species. The external form is not clearly apparent, owing 
to breaking of the specimen, but in general character it agrees very closely 
with Pseudosuberites hyalinus (Hymeniacidon hyalina of the ‘ Challenger ’ 
Report) except in the spiculation, the spicular measurements being much 
larger than those of P. hyalinus and more nearly corresponding with those 
of P. sulphurea, Tops. (34). The specimen has, however, been assigned to 
the former species on the grounds of general similarity. 
Locality. The specimen was obtained on Suez mud-flats. 
Distribution. Red Sea, Mediterranean, Patagonia. 
Family CLIONID &. 
Astrotetraxonida of boring habit, forming excavations in the shells of 
Mollusca and other calcareous bodies. 
CLIONA CELATA, Grant. 
Synonymy :— 
1826. Cliona celata, Grant (14 a). 
1900. Cliona celata, Topsent (34). With complete synonymy. 
1909. Cliona celata, Hentschel (15). 
The Clionids in the collection consist of four Lamellibranch shells, all more 
or less bored by the sponge. None of them show any growth of the sponge 
outside the shell. 
It has therefore been decided to place them all in the species C. celata, 
with the spiculation of which they agree very well. 
The shells are all Margaritifera vulgaris, save one, which is very much 
damaged by the Cliona, and unidentifiable. 
Locality. Two specimens were obtained from Suez mud-flats and two from 
Khor Dongonab. Of these latter Mr. Crossland says in his notes :— 
“The Clione forms a sheet on both surfaces of the shell, a state of things 
I do not remember seeing before. In this connection note that in many old 
pearl-shells the Clione destroys the outer part of the shell completely, but is 
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