182 
CLASS III.— ORDER I. 
branches upright and cylindrical; surface unequal, 
a little jagged, and partly striated; fibres in bundles 
or long locks. 
Australasia. 
TUPHA. 
141. Spongia tupha. Branching, soft, and very po- 
rous ; branches ascending, few, cylindrical or slightly 
compressed, obtuse at the summit, and nearly resem- 
bling straps ; texture a little incrusted. 
Mediterranean. 
ARCHED. 
142. Spongia fornicifera. Spread out at the base, 
and branching; ramifications flattening as they 
expand, anastomosing, and forming arches and ar- 
cades. 
Mediterranean. 
SEMI-TUBULOUS. 
143. Spongia semitubulosa. Soft, and very branch- 
ing ; small branches cylindrical, variously tortuous, 
almost united, and sometimes half tubulous. 
Mediterranean. 
ELK-HORNED. 
144. Spongia alcicornis. Tufts of many stems ; 
stems branching, and flattening at the commencement 
of the branches ; ramifications irregular, attenuating in 
straps that are slender towards the summit ; oscules 
small, and dispersed on the wider parts. 
DEER-HORNED. 
145. Spongia damacornis. Tufts formed of many 
