ACCOUNT OF BRITISH SPONGES. 



121 



Index to the Plates. 



Plate iii. fig. 1. Spongia stuposa, — a branch. 



fig. 2. Supposed var. with palmated branches, — % 

 branch. 



Plate iv. Spongia stuposa ? — with slender, ascending, 



and very hirsute branches. 

 Plate V. fig. 1. Spongia hispida. 



fig. 2. Ditto var. — with short forked tips. 

 Plate vi. fig. 1. Spongia dichotoma, — a branch. 



fig. 2. Spongia oculata, — an anastomosing branch. 

 Plate vii. Spongia digitata. 



Plate viii. Spongia ramosa. 



Plate ix. fig. 1 . Spongia lobata. 



fig. 2. Spongia complicata, — double the nat. size, 

 fig. 3. Ditto ditto, - — considerably magnifi^e4. 

 Plate X. Spongia conus. 



Plate xi. fig. 1. Spongia rigida. 



fig. 2, Ditto var. — with more slender divarications. 

 Plate xii. Spongia foliacea, — a group attached to fucus. 



Plate xiii. fig. 1. Spongia pilosa, — a part of the pilose covering 

 removed, shewing the spongy fibres, 

 fig. 2. Ditto, — divided in the middle to shew the as* 



bestine nucleus, 

 fig. 3. Ditto, — the spongy surface magnified, 

 fig. 4, 5. Spongia verrucosa, — two different views, the 

 latter broken at the base, shewing the ra- 

 diating asbestine fibres, 

 fig. 6. A portion of the surface of Spongia verru- ' 



cosa magnified by the same lens as No. 3, 

 fig. 7. Spongia penicilla. 

 Plate xiv. fig. 1. Spongia fragilis. 



