564 
ME. H. 1ST. EIDLEY ON TITE 
POEIFEEA. 
By H. J. Caeteb, F.R.S. 
Dry Specimens. 
These were all too much beach- worn for specific distinction. 
The Nos. correspond with those on the Specimens. 
1. Pouythebsks, Duchassainy et Mich.* 
2. Hiecinia. 
3. Ciialina. — Spicules fine, slender, acerate. 
4. Hiecinia. — Fine structure. 
5. Euspongia (“ best Turkey Sponge ” of commerce). 
6. Euspongia. — Bearing Polytrema miniaceum. 
7. Hiecinia. — Skeletal structure partially filled with the 
filaments of Sponyiophaya communis. 
Wet Specimens. 
Most of these are too fragmentary for specific distinction, 
although possessing the natural characters which they pre- 
sented when taken from tlieir habitat. 
8. Polytherses. — Two coarse pieces alone; the rest on pieces 
of a fine JELircinia. 
9. Euspongia (“best Turkey Sponge” of commerce”). — Three 
or four discoloured pieces. 
10. Chondeilla nucula, Sdt. 
11. Geodia. — P G. Tumulosa, Die. — Siliceous balls spherical. 
Zone-spicule trifid; arms simple, undivided, extending upwards, 
outwards, and lastly horizontally. Bearing Polytrema. 
12. Chondeopsis aeenifeea, Cart. (Ann. & Mag. Nat. 
Hist. 18S6, yoI. xvii. p. 122). — Acuate spicules, sometimes blunt 
at each end. 
* It should be remembered that “ Polytherses ” is a Hcrcinia in which the 
soft parts have been replaced by a structure composed of the filaments of 
Spongiophaga communis, Cart., which is of world-wide occurrence, but of which 
the nature is still unknown. 
