402 CELLEPORIDjE. 



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

 St. Andrews, deep water (Dr. M'Intosh) : 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, 110-140 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 

 zoo2cia 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. pumicosa; another may 

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

 tulate avicularia, which are always wanting in the latter. 



Busk represents the ovicell as punctured, whilst Alder, 

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



