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 fomicifera. 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 alcicomis. 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 dcancecorms. Tufts formed of many 



