60 CELLULARIID^E. 



circular space in front, from which fine striae radiate 

 to the margin. 

 Height about 1 inch. 



Habitat. Deep water. 



Localities. Shetland, deep water (Flem.) : Orkneys 

 (Barlee) : the Minch ; Shetland, 40-70 fms,, abundant 

 (A. M. N.) : ofFthe coast of Antrim, 62-72 fms. (Mr. W. 

 Swanston), the most southern recorded locality on our 

 coasts. 



Geographical Distribution. Labrador and Maine 

 (Packard) : St, George's Banks, 28 and 150 fms. (Smith 

 and Harger) : Greenland, 100 fms. ; Reykjavik Harbour, 

 15-20 fms. (Wallich) : Scandinavia and Finmark, 50-80 

 fms., not uncommon (Smitt) : RoscofF, rather rare, in 

 large tufts on fragments of Eschara ( Joliet) . 



Range in Time. Scotch Glacial deposits (Geikie) : Pa- 

 leolithic (A. Bell). 



The cells in this remarkable form are peculiarly shaped ; 

 they are short, somewhat four-cornered, almost entirely 

 open in front, and present, as Smitt has pointed out, a 

 very Membraniporidan appearance. The branches are 

 convex, rising considerably towards the centre. They 

 consist towards the lower part of two rows of cells ; but 

 this number increases to three or even four rows, so that 

 the branches widen upwards. 



The lateral avicularia are very small, and may readily 

 escape detection. They are placed just at the base of the 

 lowest of the spines on the outer margin, and extend for 

 some distance down the side of the cell, but project very 

 slightly. We do not find the rounded mandible, which 

 belongs to this species and to C. Boryi, in any of the allied 

 genera. 



The vibracular cell is of great size, somewhat fusiform, 

 Avith a smooth and polished surface, and of very delicate 

 texture. The groove occupies about two thirds of its 



