CERIANTHARIA. 



Skagerak 380400 fath. brown clay 10. 6. 1879. Gunhild Exp. 1879 St. 5, i ex. R. M. 



Vaderoarne Loveni875 i ex. Goes i ex. North Coralreef July 1899, Sandberg i ex. R. M. 

 Kattegat. Gulmar fjord Strommarne. Skatholmen Carlgren June 1894 many ex. 



Theel 1879, Zool. Star. 1896, 1898. Bonden Carlgren 1891 R. M. 

 Fittebojen, Gotenb. Mus. 



Lilla Middelgrund. Gunhild 1879 I ex - ^ M. 

 Kullen, M011e 1832 S. Loven i very small ex. 



Hellebsek Lutken T small ex. (Cerianthus Danielseni Lev) Cop. M. 

 Jungersen i small ex. ( ) Cop. M. 



North Sea. Heligoland from Prof. Hartlaub i ex. R. M. 



Further distribution. British Isles (Gosse). 



Dimensions. In the largest specimen (Ice fjord 1908) the length of the body is about 15 cm. 

 Breadth of same i 1.2 cm. Length of marginal tentacles up to 3-5cm. Length of labial tentacles up 

 to i -5 cm. 



Colour. Column more or less white, commonly tending to yellow (pale buff to ochre), 

 immediately below the ring of tentacles often inclining to chestnut, paler or deeper. The outer ten- 

 tacles are transparent, the base surrounded by a white ring that runs down in a point to the oral 

 disc. Inside this the oral disc has often a darker chocolate-coloured portion with more or less plain, 

 often broken bands of chocolate to chestn tit-brown. These bands often run together and form larger, 

 brown portions that take up the sides of the tentacles. Between these darker bands are found elon- 

 gated patches of opaque white. 



The labial tentacles deep chestnut or chocolate-brown to bright almost opaque white; on the 

 outer side is found a longitudinal white or dingy white portion so that, seen from this side, the ten- 

 tacles give the appearance of being opaque white with chocolate-coloured edges. 



The oral disc is transparent with the parts between the attachment of the mesenteries more 

 or less opaque white, but this does not go as far up as the tentacles. The directive chamber has 

 plain marks of opaque white. The stomatodaeum is of the same colour as the column, though it 

 has a somewhat darker brownish-yellow. The siphonoglyph is lighter. 



The above account of the colouring is based on the observation of 4 specimens from Bohuslan, 

 Sweden. 



Danielssen says (1888) that the column in C. borealis i. e. C. lloydii is whitish-yellow and the 

 oral disc rather darker. The tentacles have a brownish tinge, 



Exterior aspect. The column has the characteristic form of the Cerianthidae, without aboral 

 pore. The tentacles are of medium length and very short for the size of the animal. In specimens 

 whose tentacles are undergoing regeneration, it seems on cursory inspection as though the tentacles 

 might be covered by the upper border of the column (compare Danielssens drawing Fig. 3, Tab. i, 

 1889), which is not the case. The marginal and the labial tentacles in the larger specimens number 

 each about 70, in smaller specimens a lesser number is found. The number of marginal and labial 

 tentacles respectively is not likely to exceed 70, as the longest specimen (from the Spitsbergen Expe- 



