G. SPONGIA. 153 



CAVERNOSE. 



4. Spongia cavernosa, A kind of conic oval; vStiff, 

 rather hard, and very full of cavities; surface stud- 

 ded with small risings, and irregularly porous. 



American seas. 



CARIOUS. 



5. Spongia cariosa. Shapeless and irregularly 

 lobed ; furrowed, and caverned, as if bitten ; texture 

 fibrous, rather finely reticulated with irregular meshes ; 

 surface covered with crevices and holes. 



Indian Ocean. 



LICHEN- FORMED. 



6. Spongia Ikheniformis, Sessile, rugged, and 

 clustered ; fibres very loose, crossing and anasto- 

 mosing together, branching and tough. 



Found in many seas, and varying in form. 



BEARDED. 



7. Spongia harha. A long mass, loosely reticu- 

 lated, strongly resembling a goat's beard, or the Li- 

 chen barbatus. 



On the Spondylus Goederopus of the Mediterra- 

 nean. 



FASCICULATED. 



8. Spongia fasciculata. Stiff, and nearly globu- 

 lar, formed by bundles of fibres, prism-shaped and 

 branching. 



Mediterranean. 



LACERATED. 



9. Spongia lacera. Sessile, oval, and convex ; 

 Cor. u 



