AMORPHOZOA. 



Genus Tethea. 



T. li/ncun'uni, Liiiu. (sp.). 



Strangford Lough, both on dead and on living specimens of 3fodioI.us 

 vul(/aris, and on dead univalve shells. They were all bright yellowish- 

 orange in colour (hence Pallas' name aurantiitm) when recent, but be- 

 came at once discoloured on being put in spirits. The lai'gest Tethea is 

 1| inch high by H 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 Avhen alive a conspicuously hispid appearance. One or two spe- 

 cimens of what seem to be young Tetliece (half an inch diameter) on the 

 same shell with the old, are quite smooth on the surface. 



Genus Halichondria. 



H. oculata. Pall. 



Found on the shore of Belfast Lough, Mr. Templeton. 

 Belfast Bay, Sept. 1837, Messrs. Getty and Hyndman. Dublin Bay, 

 Dr. Hassall. 



H. cervieornis, Pall. 



Belfast Bav, 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, adhci'ing to shells, in eighteen 

 fathoms water. 



H. hispidu, 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 X. H. (vol. xvii. p. 176), noticed it as having been dredged from 

 deep water at lloundstone 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 Cythcrea orata, 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 fidl as to 

 require no addition. ILilieJiondrut manimiUaris, Dj/sidea frar/ilis, D. ? 

 papi/hsa (as already noticed), Aliona chelata, &c., were obtained on the 

 same occasion. 



