G. SPONGIA. 159 



PENCIL-FORMED. 



34. Spongia penicillosa. Surface stuck with small 

 pencil-like brushes, which are stiff and upright. 



Var. A. In the form of a club. 



Var. B. Shorter, and nearly globular. 



Australasia. 



PROTUBERANT. 



35. Spongia turgida. Mass substipited, gib- 

 bous, and fibrous ; summits pierced with three or 

 four separate oscules, or with a single terminating 

 hole. 



Var. A. Upright, gibbous, and with three oscules. 



Var. B. Mass oval, oblique, and with a single 

 hole. 

 Australasian seas. 



SILKY. 



36. Spongia bombj/cina. Form oval, swelled, or 

 bulging, divided at the summit into short and upright 

 lobes ; texture loose ; fibres bare, crossed, inter- 

 laced, and of a scarlet colour ; surface hairy and 

 curly. 



Var. B. Smaller, bulging, and almost compressed. 



Australasian seas. 



flammeous. 



37. Spongia Jiammula. Generally simple, rather 

 upright, and of a lanceolated oval form ; summits ob- 



