120 
THE OCEAN WORLD. 
texture, forming ramified canals which radiate from the base to the 
circumference. Summit with a central pit. 
Scyphia (Oken). — Mass cylindrical, simple, or branched, fistulous, 
ending in a large rounded pit, and composed entirely of a reticulated 
tissuo. 
Eudea (Lamouroux). — Mass filiform, attenuated, sub-pedicellate at 
one end, enlarged and rounded at the other, with a large terminal pit ; 
surface reticulated by irregular lacunae, minutely porous. 
Halirrhoa (Lamouroux). — Mass turbinated, nearly regular, circular, 
or lobate ; surface porous ; a large central pit on the upper face. 
Happalimus (Lamouroux). — Mass fungiform, pedicellate below, ex- 
panding conically, with a central pit above ; surface porous and irre- 
gularly excavated. 
Cnemidium (Goldfuss). — Mass turbinate, sessile, composed of close 
fibres and horizontal canals, diverging from the centre to the circum- 
ference ; a central pit on the upper surface, cariose in the exterior and 
radiate at the margin. 
I erect, (Lamouroux). — Mass ovoid, sub-pedicellate, finely porous 
pierced on the upper part by many orifices, the terminations of the 
internal tubes. 
I’ethiuw, (Lamarck). — Mass sub-globose, tuberose, composed of 
cariose firm substance, strengthened by abundance of siliciary spicula, 
fasciculated, and diverging from the centre to the circumference. 
