PLATE III. 



Leccosolenia botryoides, Bowerbank. 



Vol. ii, p. 28, ' Mon. Brit. Spongiadte,' and vol. i, pi. xxvi, figs. 347-348. 



Fig. 1. — A specimen of L. hotryoldcs from Shetland, 

 in which the fistnl^ are much more developed than is 

 usual with the species. Natural size. 



Fig. 2. — A specimen of L. hotrijoides parasitic on a 

 slender fucus, in which the fistula3 are small and 

 scattered along the stem. This form is the usual one 

 under such circumstances. Natural size. 



Fig. 3. — One of the equiangular triradiate spicula of 

 the skeleton of L. botryoicles. Xl50 linear. 



Fig. 4. — One of the spiculated, equiangular, tri- 

 radiate, internal, defensive, spicula of L. botryoides. 

 X 160 linear. 



Vol. i, Plate XXYI, fig. 348, represents the fistulas 

 clustered in a group, as they are frequently found in 

 Weymouth Bay and at Tenby. Natural size. Fig. 

 347 in the same plate represents two of the fistulge. 

 X 50 linear. 



Leucosolenia contoeta, Boiverbanh. 



Vol. ii, p. 29, ' Mon. Brit. Spougiada;.' 



Fig. 5. — A small specimen of L. conlorfa from 

 Guernsey, magnified to illustrate the contort arrange- 

 ment of the fistulfe. X 150 linear. 



Fig. 6. — The specimen represented by fig. 5. 

 Natural size. 



Fig-. 7 represents one of the largest specimens of L. 

 contorta that I have yet seen. Natural size. 



Fig. 8. — One of the slender, equiangular, triradiate, 

 internal, defensive spicula of the skeleton of L. crmfortri . 

 X 160 linear. 



