4 Mr. J. E. Duerden on 
brown ; cesophagus brown; tentacles brown, paler distally, 
minutely spotted with darker brown. 
Dimensions.—Diameter of base 12 centim.; height and 
diameter of column when fully expanded 6:3 centim.; length 
of peduncle of largest vesicles 1:25 centim., diameter 
0:8 centim. ; mouth 1°25 centim. across. 
The individual dissected was much contracted and flattened. 
Its length was 2°5 centim., the longer diameter of the base 
1°5 centim., and the shorter 0°7 centim. 
Locality.—Three specimens only have been obtained at 
Madeira by Mr. J. Y. Johnson. The first and finest was 
the one from which his original description was taken, and 
was said to have been obtained at a depth of a few fathoms 
from a fish-basket sunk in the Bay of Funchal. It was 
destroyed in an attempt to take it to England. A second 
was sent in spirit to the British Museum, and the third was 
very generously placed at my disposal by Mr. Johnson. 
The specimen was much contracted and flattened, and the 
tentacles not infolded*. The vesicles were pressed against 
the column-wall. It was roughly triangular in outline, the 
lower part being much wider than the upper. The base was 
radiately and concentrically folded to a small degree, the 
margin being crenate. Although not in a good state of 
preservation for histological purposes, sufficient could be 
distinguished to allow of a determination of the most distinc- 
tive characters. 
Activities.—The polyps frequently change their position in 
confinement and may even float base upwards. ‘The upper 
part is generally in slow constant motion. ‘The tentacles, 
usually more or less displayed, may be completely retracted. 
The urticating powews of the tentacles and vesicles are con- 
siderable. Specimens bear confinement well. 
Column-wall.—The ectoderm is well developed in the 
capitular region and richly supplied with nematocysts ; these 
are, however, of a different character from those in the 
* The tentacles are evidently not readily infolded in most members of 
the genus. Verrill (1869, p. 472) likewise mentions that most of his 
specimens of C. grandis preserved in alcohol have the tentacles more or 
less extended and the disk exposed. 
in a later paragraph of the same paper (p. 473) Verrill states that the 
Anthopleura granulifera of Duchassaing and Michelotti (Actinia granu- 
lifera, Les.) appears to belong to the genus Cladactis (Alicia), since it is 
said to be imperforate and tuberculated. I have lately obtained the 
species in abundance from Jamaican waters, and it may be here men- 
tioned that an anatomical investigation shows it isan undoubted Bunodes, 
possessing a well-developed, circumscribed, endodermal muscle, 
