CA R YOPHYLLIA CEA . 
C APNEA DjE. 
THE YELLOW IMPERIAL. 
Aureliania lieterocera. 
Plate IX. Fig. 12. 
Specific Character. Base scarcely exceeding column ; yellow. 
Corynactis heterocera. W. Thompson (w.), Proc. Zool. Soc. 1853. Go.sse, 
Man. Mar. Zool. i. 28. E. P. Wright, Nat. 
Hist. Review, April, 1859, p. 122. 
GENERAL DESCRIPTION. 
Form. 
Base. Adherent to rocks : scarcely exceeding the column in width ; 
very slightly undulate. 
Column. A stout cylindrical pillar, about as wide as high, but often con- 
stricted below the margin, when the lower portion becomes neai’ly hemi- 
spherical : margin forming a thick parapet, the inner edge of which is 
crenate, and separated from the tentacles by a narrow fosse. Surface smooth, 
entirely invested with a thin slimy epidermis, which is easily rubbed off, 
and quickly renewed. Substance firm and coriaceous ; perfectly opaque. 
Disk. Nearly circular, entire, ample, membranous, flat or slightly 
convex : radii fine but distinct. 
Tentacles. About 120, set in four rows, of which the outermost con- 
tains 32; the others one or two less : they are short, thick, cylindrical, 
with knobbed tips, diverse among themselves. The 
knobs of the outermost row are little wider than 
the stems, they are sub-conical, or kidney-shaped, 
seemingly formed of two lobes, with a round 
tubercle seated on the inner face just below the 
knob. Of the second row the knobs consist of two 
swellings divided by a constriction, each swelling 
composed of two globose lobes placed side by side, 
with a mucro terminating the whole. Of the two 
innermost rows the knobs are nearly sessile ; they 
are rondo-quadrangular, or shaped somewhat like 
a loaf of bread. In the expanded state all these 
organs He ne<arly horizontal, pointing outwards, and slightly overlapping 
the parapet. 
TENTACLES OF A. HETE- 
ROCERA. 
