382 COELENTERATA ANTHOZOA chap. 



Aiptasia couchii is a trumpet-shaped Anemone, found under 

 stones at low-water mark in Cornwall and the Channel Islands, 

 with relatively slight power of retraction. 



Gephi/ra dohrnii is an interesting species with twelve tentacles, 

 which was supposed at one time to form a connecting link between 

 the Actiniaria and the Antipathidea. It is found attached to 

 the stems and branches of various Hydrozoa and Alcyonaria, 

 sometimes in such numbers and so closely set that it gives 

 the impression of having formed the substance of its support. 

 Haddon ^ has described specimens found on the stems of 

 Tubularia from deep water off the south and south-west coasts 

 ■of Ireland. It also occurs in the Mediterranean and the Bay 

 of Biscay. 



Fam. 4. Aliciidae. — The members of this family have a large 

 flat contractile base and simple tentacles. The body-wall is 

 provided with numerous simple or compound outgrowths or 

 vesicles, usually arranged in vertical rows. Alicia mirabilis is 

 a rare Anemone from Madeira with a very broad base, capable of 

 changing its position with considerable activity, and of becoming 

 free and floating upside down at the surface of the sea. Other 

 genera of the family are Bunodeopsis and Cystiactis. The genus 

 Thaumactis, described by Fowler,^ from the Papeete reefs, has 

 many peculiarities, but is probably capable of crawling rapidly 

 and of floating at the surface like other members of the family. 

 The remarkable Anemone Lebrunia from the West Indies may be 

 included in this family. 



Fam. 5. Phyllactidae. — These are distinguished by the 

 presence of a broad collar of foliaceous or digitate processes out- 

 side the circle of tentacles. The processes have some resemblance 

 to the foliaceous tentacles of the Stichodactylinae. They are 

 found in the Mediterranean, Eed Sea, and on the shores of the 

 Atlantic Ocean, but have not yet been found in the British area. 



Fam. 6. Bunodidae. — This family is characterised by prominent 

 verrucae and tubercles of the body-wall. It contains several 

 British species, of which Bunodes gemmacea found between tide 

 marks on our southern shores is fairly common. The very 

 common British species Urticina {Tealia) crassicornis is usually 

 placed in this family, but exhibits some peculiarities which seem 



' A. C. Haddon, Trans. Boy. Dubl. Soc. iv. 1889, p. 325. 

 2 G. H. Fowler, Quart. Journ. Mier. Sci. x.xix. 1888, p. 143. 



