ADDITIONS. 353 



alive, the colour was a deep flesL-rcd, and it retained 

 that colour, but of a lighter tint when dried. The 

 structural characters were precisely the same as those 

 of the specimens previously described, with tlie addi- 

 tion of gemmules which I had not observed in either 

 of the other specimens. These organs were mem- 

 branous and aspiculous, and some of them were filled 

 with well-developed spherical molecules. 



Hymeniagidon cocginea, Plate XXX. 



Among the sponges I received for examination froni 

 the Liverpool Museum, there was a specimen of this 

 species, parasitical on the stems of a slender fucus, 

 bindino- them too-ether into an irrea'ular elongate mass 

 about three inches in length. The surface in tlie 

 dried specimen was of the same colour as that of the 

 type one and somewhat more uneven and rugged, and 

 the stractui'al characters were the' same in both. It 

 Avas found in Belfast Lough, in 1872, by Mr. Thomas 

 Higgin, of Huyton, near Liverpool. 



Htmeniacidon plaoentula, Plate LXXII. 



Since the description of this species in the present 

 volume p. 185, I have received a third specimen of 

 this sponge for examination from the Rev. A. M. 

 Norman, labelled " Shetland Haaf." It is very like 

 the one represented in Plate LXXII, fig 5, but about 

 an inch less in length. In its anatomical characters 

 it is pi-ecisely the same. 



Haliohondria glaeua, Plate XIjI. 



Among some other sponges obtained at Hastings, I 

 found a specimen of II. glahra, parasitical on a sertu- 

 laria, in the form of a thin, flat, irregularly-formed cake 



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