522 ZOOPHYTA. SPONGIAD^. Halichondbia. 



with small rounded elevations and depressions, in the latter of which the 

 small orifices are usually placed 5 pores minute ; slimy. 



99. H. Mrsuta. — Crust very thin, with long projecting spi- 



cula. 



Sponge, Cordiner^s Ruins, No. 24, f. e. E. — On Escharse from deep wa- 

 ter, coast of Banff and Zetland. 



Base when dry very thin, granular, with long single-pointed spicula, the 

 surface hirsute with the projecting free extremities. Cordiner represents 

 some of thejspicula as triradiate, a circumstance which I have not observed 

 in my Zetlandic specimen. , 



100. H. suherica. — Crust compact^ pores very minute ; spi- 

 cula fusiform and slightly curved. 



Spongia suberica, Mont. Wern. Mem. ii. 100. — On old univalve shells, 

 Devonshire. 



Crust tough, the pores scarcely visible, yellow ; it is more dense in its sub- 

 stance, the spicula are smaller, and the fibres less intenvoven than H. pa- 

 pillans ; besides, there are no orifices on the surface. I have found this spe- 

 cies encrusting Corallines in the Frith of Forth. 



101. IrL.Jruticosa. — Fibres distant, nearly smooth, forming 

 by their junctions large irregular meshes ; spicula linear, ob- 

 tusely pointed at one extremity. 



Sponge, Cordiner' s Ruin's, No. 7- £ d, D. — S. frut. Mont. Wern. Mem. 

 ii. 112. t. xiv. f. 3, 4— In deep water. 

 Irregular, cavernous, very loose in texture, and, from the largeness of the 

 cells, very pervious to light ; the fibres are crooked, and frequently throw 

 out irregular processes, with scattered spicula on the sides and points. 



102. H. coaliia. — Branched in an irregulai' distorted man- 

 ner; orifices tubular, small; spicula large, fusiform and curved. 



Alcyonium ramosum molle, meduUae panis intus simile, Ray, Syn. Stirp. 

 31. — Spongia coalita. Mull. Zool. Dan. t. cxx. Mont. Wern. Mem. 



ii. 80 Coast of Devon rare, Frith of Forth very common. 



Growth very irregular, branches J more or less compressed, frequently 

 uniting ; substance resembling H. papillaris ; tubular processes sometimes oc- 

 cur on the sides of the branches, with small round orifices, It grows on 

 dead shells or invests corallines, beyond low-water mark. 



103. H. kispida. — Round, slender, hirsute, branches with 

 tapering pointed subdivisions ; spicula linear, coarse, and obtuse- 

 ly pointed. 



Spongia hispida, Mont. Wern. Mem. ii. 81. t. v. f. 1, 2.— In deep-water 

 on the coast of Devon. 

 The substance is hard, and the surface covered with stiff hairs; the 

 branches are slightly divided ; some of the spicula are slightly curved. 



104. H. Montaguii. — Base sending out numerous erect 

 branched tubes, die walls of which become very thin towards 

 the extremity ; spicula lengthened, fusiform. 



Spongia tubulosa, Mo7it. Wern. Mem. ii. 91.— On stones at low-water, 

 Kingsbridge, Devonshii'e. 



