494 ALCYONIDIIDvE. 



Poiypide with 17-18 long aud slender tentacles^ which are 



often spirally coiled and much twisted. 

 Height 5 or 6 inches. 



Habitat. On Algse betAveen tide-marks and in shallow 

 water. 



Localities. South Devon; Ilfracombe, on CoraUina-, 

 Watchet, Bristol Channel ; Isle of Man ; Filey ; 

 Landudno ; Menai Straits ; Oban (T. H.) : Cullercoats, of 

 humble size ; North Northumberland, 5 or 6 inches high 

 and about as much broad, largest beyond low water 

 (Alder) : St. Andrews (Dr. M'Intosh) : Shetland, Balta 

 Sound, and Out-Skerries, tide-marks (A. M. N.) : entrance 

 to the Firth of Forth, 30 fathoms (Kirchenpauer) : Has- 

 tings (Miss Jelly) ; Northern shores of Ireland, not 

 uncommon, especially on Delesseria alata ; Connemara 

 (W. T.) : Dublin Bay; Youghal (Miss Ball) : Glcndore 

 (Allman). 



Geographical Distribution. Roscoff (Joliet) : Kat- 

 tegat (Kirchenpauer) : Bahusia, chiefly on Fucus serratus ; 

 Spitzbergen, 13 fathoms, on Fucus (Smitt) : Finmark 

 (Goes and Malmgren) : Greenland (Liitken). 



This species occurs in two very distinct forms — as a 

 rather thick gelatinous crust, overspreading various kinds 

 of Algae, in which state it is in all probability the Cycloum 

 papillosum of Hassall ; and as an erect, palmate growth, 

 which often attains a very considerable size. On the 

 South-Devon coast it grows luxuriantly, forming large 

 palmate expansions, several inches in width, variously 

 lobed, and of remarkable beauty. These are given off 

 from a spreading base. 



Dr. Johnston mistook the papillae for the zooecia; but 

 the orifices of the latter form low, irrcgularly-shapcd 

 risings, slightly depressed in the centre, and are distri- 



