G. SPONGIA. 165 



compressed, and black; stria) thorny, and longitu- 

 dinally placed on each surface. 



Supposed to originate from America. 



BELL-SHAPED. 



Gl. Spongia campana. Large, rough, and stiff, in 

 the form of an upright bell ; fibres incrusted, inner 

 surface osculated. 



American seas. 



TURBINATED. 



Q2, Spongia turbinata. In the form of a long 

 funnel, rather narrow, stiff, and very simple ; inter- 

 nally marked with longitudinal striae and small os- 

 culiferous jagged risings. 



American seas. 



CRUCIBLE. 



63. Spongia vasculum. Turbinated and thick; 

 surface smooth ; border woolly. 



CABBAGE-FORMED. 



64. Spongia brassicata. In the form of a large 

 open foliated cup, or resembling a cabbage whose 

 under leaves alone are expanded. 



Indian Ocean. 



GOBLET-FORMED. 



65. Spongia cyathina. Crater-form, simple and in- 

 crusted ; surface elegantly and very finely cleft, sown 

 with small oscules. 



Southern seas. 



