402 CELLEPORID^. 



Dogger bank (T. H.) : Guernsey ; Hastings (Miss Jelly) : 

 St. Andrews, deep Avatcr (Dr. M'Intosli) : Shetland, 40- 

 170 fathoms; the Minch (A. M. N.) : between 62 and 72 

 fathoms off the Maiden Lighthouses, coast of Antrim (Mr. 

 W. Swanston) : Belfast Bay (Hyndman) : Donaghadee, 

 8-10 fathoms (Dr. Drummond) : Youghal (Miss Ball) : 

 8 miles S.S.W. of the Mull of Galloway, 50 fathoms; 5 

 miles S.W. of the same, 110-1 10 fathoms (Capt. Beechey) : 

 off Sana Island, 40 fathoms (Hyndman) : &c. 



Geographical Distribution. Norway, to the North 

 Cape (Kirchenpauer) : Bohuslan, 50-60 fathoms (Loven) : 

 Bergen ; Finmark (Sars) : Roscoff (Joliet) : Madeira 

 (J. Y. J.). 



Range in Time. Coralline Crag (S. W.). 



There are two marked varieties of this species — one 

 slender and delicate, the other with broad, somewhat 

 flattened branches, and altogether a stouter habit. At its 

 origin, when developed on the various kinds of zoophyte, 

 its favourite site, the zoarium surrounds and clasps the 

 stems ; and then the erect shoots rise from all parts of the 

 incrusting base. The branching is often luxuriant, and 

 results in the formation of very pretty coral-like masses 

 of considerable size. The surface of the zoarium appears 

 rough and spinous. 



The usual differences between the older and younger 

 zooecia occur in a very marked degree in this species ; in 

 the latter a row of large punctures may be traced round 

 the very base of the cell. The position of the oral avicula- 

 ria on the side of the rostrum is one of the points which 

 distinguishes this form from C. jjumicosa; another may 

 be found in the presence (though rarely) of the large spa- 

 tulate avicularia, which are always w^anting in the latter. 



Busk represents the oviccll as punctured, whilst Alder, 

 on the other hand, describes it as imperforate. Both, I 



