28 A MONOGRAPH OY THE 



the same size and proportions, and not exceeding five lines 

 in length and a line and a half in diameter. 



Genus Leucosolenia, Boioerbank. 



1. Leucosolenia botryoides, Bowerbank. 



2. contorta, Bowerbank. 



3. lacunosa, Bowerbank. 



4. coriacea, Bowerbank. 



1. Leucosolenia botryoides, Bowerbank. 



Grantia botryoides, Fleming. 

 Johnston. 



Spongia Ellis and Solcmder. 



Sponge. Arborescent, cylindrical, slightly pedicelled ; 

 parietes very thin ; surface smooth. Cloaca very 

 large, armed internally with spiculated equiangular 

 triradiate spicula ; spicular ray large and long, slightly 

 curved ; months of cloaca one or more, terminal, 

 simple, and unarmed. Oscula and pores inconspicu- 

 ous. Spicula of skeleton equiangular, triradiate; 

 radii somewhat short and stout, rapidly attenuating. 



Colour. White. 



Habitat. Parasitical on fuci and zoophites, coasts of 

 Great Britain, abundantly, littoral and to 8 or 10 fathoms. 

 Mvamin ed. Alive. 



I have found this species abundant in eight or ten 

 fathoms at Weymouth Bay, Tenby, Torbay, and in many 

 other localities where I have dredged, and it is usually para- 

 sitical on small fuci, along with Grantia compressa and 

 ciliata. When placed in a cell in a little somewhat turbid 

 sea water, with a power of 150 linear, the excurrent streams 

 are generally seen pouring forth strongly and steadily from 

 the mouths of the cloaca. 



Tufts of this species are frequently found exceeding an 



