G. SPONGIA. 
159 
PENCIL-FORMED. 
34. Spongia penieillosa. 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 bombycina. 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 flammula. Generally simple, rather 
upright, and of a lanceolated oval form ; summits ob- 
