122 Scientific Proceedings, Royal Dublin Society. 
tentacle smooth, oral aspect flattened with lateral swellings alter- 
nately large and small. 
Colowr.—Column, cream below, passing into gray above, lower 
portion streaked or spotted with red-lead colour; suckers and 
marginal crenulations white ; disc, central area cream-colour, with 
dark brown lines; area of the inner cycles of tentacles dark 
brown, a white spot in front of each tentacle ; the inner tentacles 
have a madder tinge with a green sheen on their oral aspect; 
marginal tentacles transparent brown aborally, cream colour 
orally, the swollen portion spotted in the middle. 
Dimensions.—Height, about 100-130 mm. ; diameter of corona, 
250 mm. ; largest tentacles, 30 mm. x 6 mm. 
Habitat.—F ringing reef, Mer. 
Phymanthus muscosus, 0D. sp. 
Form.—Forty-eight rows of small tubercles on upper portion ~ 
of column; crenulated parapet; flat, completely retractile dise ; 
small round mouth; 96 tentacles, bearing alternately large and 
small dendritic appendages. 
Colour.—Column, various shades of gray, darker above than 
below ; disc green with dark or light spots; tentacles gray with 
green appendages. 
Dimensions. — Height, 250-500 mm. Diameter of corona, 
500-750 mm. 
Habitat.—Surface of fringing reef, Mer. 
This species is allied to the type species of the genus, P. Joligo 
(Ehr.); but the lateral appendages to the marginal tentacles are 
more dendritic that in the latter species, and the rosette-like disc- 
tentacles are absent. It is also very close to Thelaceros rhizophore, 
Mitch.1. This genus cannot stand, but we believe it is to be a 
distinct species. Phymanthus simplex is a well-marked species. 
1P. C. Mitchell, ‘‘Thelaceros rhizophore, n.g. et sp., an Actinian from Celebes,’ 
—Quart. Jour. Micr. Sci. xxx., (N.S.), 1890, p. 551. 
