522 ZOOPHYTA. SPONGIADiE. Halichondria, 
with small rounded elevations and depressions, in the latter of which the 
small orifices are usually placed ; pores minute ; slimy. 
99- H. hiTSuta. — Crust very thin, with long projecting spi- 
cula. 
Sponge, Cm'diner'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 thefspicula as triradiate, a circumstance which I have not observed 
in my Zetlandic specimen. 
100. PI. suberica. — 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 interwoven than H. pa- 
pillaris ; besides, there are no orifices on the surface. I have fi^- md this spe- 
cies encrusting Corallines in the Frith of Forth. 
101. Yl.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* f- c?, 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. coalita. — Branched in an irregular distorted man- 
ner; orifices tubular, small; spicula large, fusiform and curved. 
Alcyonium ramosum molle, medullm 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 ^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. hispida. — Bound, 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, the walls of which become very thin towards 
the extremity ; spicula lengthened, fusiform. 
Spongia tubulosa, Mont. Wern. Mem. ii. 91 — On stones at low- water, 
Kingsbridge, Devonshire. 
