CA n YOPII YLLFA CEA . 
ZOAYTHIDJE 
THE FURROWED CREEPLET. 
ZoantJius sulcatus. 
(Sp. iiov.) 
Plate IX. Fly. 7. 
Specific Character. Upper half of column free from sand, and indented 
with longitudinal furrows, 
GENERAL DESCRIPTION. 
Form. 
Bas il band. Broad, with an irregularly sinuous outline, and offshoots, 
often bearing three polypes abreast ; loosely invested with coarse sand. 
Column. Generally cylindrical, but versatile, sometimes hour-glass 
shaped, springing out of a membranous epidermis, which tightly invests 
it, and holds a few grains of very fine sand imbedded in it. When ex- 
tended, the column rises free and smooth out of this, which then reaches 
to about one-third of the height. Surface marked with twenty-two (in 
immature specimens twenty) longitudinal sulci, most conspicuous towards 
the summit : in the button state this is rounded, with a central depression, 
where the sulci meet. Each alternate intersulcus forms a marginal tooth. 
Bisl:. Saucer-shaped ; radii not conspicuous. 
Tentacles. Equal in number with the intersulci, with which they cor- 
I’espond, in two rows, the inner row to the marginal teeth, the outer inter- 
mediate. Sub-equal, conical, pointed, usually radiating horizontally. 
Mouth. Not raised on a cone. 
Colour. 
Column. Dull uniform olive : each intersulcus having a blackish spot 
near its summit ; and each tooth is silvery white. 
Dish. Yellow-olive ; but invariably more or less studded with very 
minute grains of white sand, which seem fixed, and look like silver fdings. 
Aggregations of these grains specially occur at the bases of the secondary 
tentacles, omitting the primary ones. 
Tentacles. Perfectly colourless and transparent, with spherical granules 
of yellow-brown pigment, set like pavement on the interior surface of the 
wall, generally in contact, yet here and there leaving large spaces alto- 
gether unoccupied. The colour of the column and disk is evidently 
formed by similar granules, but in uninterrupted contact. 
