x88 7 .] 
To nye Cornularier. 
15 
Summary. 
Rhizoxenia alba n. sp. 
Pl. I. Figs. 1—34- 
The stolon is adherent to submarine objects; alrnost snowy 
white, ribbon-shaped, nembranous, and creeping: 1 — 3 m. m. in 
breadth. 
From the stolon lateral branches issue, forming a right angle 
with the parent stem, and connecting it with adjacent stems. Here 
and there, upon the stolon, flat dilations occur. The cell is stiff, 
smooth, cylindrical, and about 2 m. m. in height, 1.7 ni. m. broad at 
the base, and about uniform in breadth from top to bottom. The 
colour whity-yellow. The margin of the cell has 8 lanceolate pa- 
pillæ, which are, however, only visible in living polyps, and then 
only on powerful magnification. 
The polyp is elongate, cylindrical, smooth; about same height 
as the cell, and almost pellucid. Septa non-calcareous. On the exter- 
nal side of the gullet, 8 series of transversal spindles, 4 series on 
each side. The gullet grooved longitudinally. The attenuated 
points of the tentacles pellucid, furnished with pinnules. 
The stolon, cell, and polyp, closely covered with spicules. In 
the posterior body of the polyp the spicules are situated trans- 
versally; in the anterior body longitudinally; in the tentacles trans- 
versally. The spicules extend quite to the point of the pinnules. 
Sympodium margaritaceum n. sp. 
Pl. I. Figs. 35-43- PL IT. 
The basal part ribbon-shaped, creeping, finely granulated, 
somewhat tumified at the base of the cell; adherent to shells 
and other submarine objects; strongly bent, and entwined with lat- 
eral branches and flattened dilations, on which are seated as many 
as 5 polyps. Colour Havannah-brown. The polyps are most fre- 
quently seated singiy. They are small, little prominent, mamillæ, 
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