4 Mr. J. E. Duerden on 



brown ; oesopliao'us brown ; tentacles brown, paler distally, 

 minutely spotted with darker brown. 



Dimensiovs. — 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 ray 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 stale 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. Tiie tentacles, 

 usually more or less displayed, may be completely retracted. 

 The urticating powers 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. 



Li a later paragraph of the same paper (p. 473) Verrill states that the 

 Anthopleura granulifera of Duchassaing and Michelotti {Actinia r/ranu- 

 lifera, Les.) appears to belong to the genus Cladactis [Alicia), since it is 

 said to be imperforate and tuberculated. 1 have lately obtained the 

 species in abundance from Jamaican waters, and it may be here men- 

 tioned that an anatomical investigation shows it is an undoubted Bunodes, 

 possessing a well-developed, circumscribed, endodermal muscle. 



