AMORPHOZOA. 
Genus Tethea. 
T. lyncurium, Linn. (sp.). 
Strangford Lough, both on dead and on living specimens of Modiolus 
vulgaris, and on dead univalve shells. They were all bright yellowish- 
orange in colour (hence Pallas’ name aurantium ) when recent, but be- 
came at once discoloured on being put in spirits. The largest Tethea is 
If inch high by If inch in diameter. The numerous spicula were in 
some individuals confined to the apices of the tubercles, and in others 
projected from all parts of them, so as to give to the entire surface of the 
animal when alive a conspicuously hispid appearance. One or two spe- 
cimens of what seem to be young Tethea (half an inch diameter) on the 
same shell with the old, are quite smooth on the surface. 
Genus Halichondria. 
II. oculata, Pall. 
Found on the shore of Belfast Lough, Mr. Templeton. 
Belfast Bay, Sept. 1837, Messrs. Getty apd Hyndman. Dublin Bay, 
Dr. Hassall. 
H. cervlcornis, Pall. 
Belfast Bay, Mr. Templeton, Mr. Hyndman. Dublin, Professor Harvey. 
Waterford, Miss Ball. 
Birterbuy Bay, dredged by Dr. Farran. Since which, Mr. M‘Calla ob- 
tained it of large size and in abundance, adhering to shells, in eighteen 
fathoms water. 
II. hispida, Mont. 
This species was only I believe known from Montagu’s description of 
specimens obtained in Devonshire until Dr. Scouler, in a contribution to 
Annals N. H. (vol. xvii. p. 176), noticed it as having been dredged from 
deep water at Boundstone by Mr. M‘Calla, collector of objects of na- 
tural history. A few specimens were taken under the circumstances al- 
ready mentioned in June last at Strangford Lough : the largest is attach- 
ed to a valve of Cytherea ovata, over which its base spreads, and thence 
it branches out on either side. Montagu’s figure of the species is cha- 
racteristic, and his description admirable as usual, and so full as to 
require no addition. Halichondria mammillaris, Dysidea fragilis, D. ? 
papillosa (as already noticed), Aliona chelata, &c., were obtained on the 
same occasion. 
