PIIYLACTELLA LABROSA. 357 



PHYLACTELLA LABROSA, Busk. 



Plate XLIII. figs. 1, 2. 



LEPKALIA LABROSA, Busk, B.M. Cat. ii. 82, pi. zcii. figs. 1-3: Hincks, 

 Dev. Cat., Ann. N. H. ser. 3, ix. 204 (44 uep.): Norman, 

 Shetland Polyz., Bep. Brit Assoc. 1868, 308. 



A LY- i DOT A LABROSA, Busk, Crag Polyz. 26, pL. xxii. fig. 7. 



PHYLACTELLA LABROSA, Hincks, Ann. N. H. Feb. 1879, 161. 



Zooecia ovate, distinct, disposed in lines, punctured over 

 the entire surface; orifice almost semicircular, with a 

 square-topped tooth on the lower margin, and on each 

 side of it a minute, sharply-pointed denticle ; peristome 

 much elevated, thickened, expanded, forming a wall 

 round the front and sides of the mouth. Ooecia small, 

 rounded, broader than long, recumbent, punctured. 



Primary cell small, ovate, perfectly smooth ; aperture or- 

 bicular, with a smooth, flat border in front, and sur- 

 rounded by a few rather tall and slender spines. 



Colonies consisting of single or double series of cells, 

 branching irregularly from a common centre, where a 

 number are massed together. 



HABITAT. Usually on old shells, from rather deep water. 



LOCALITIES. Off the Copeland Islands, Belfast Bay, deep 

 water (W. T.) : Antrim, deep water, rather plentiful 

 (Hyndman) : Shetland, scarce, 40 fathoms (A. M. N.) : 

 Oban; South Devon, not common (T. H.) : Hastings 

 (Miss Jelly) : Wick ; Cornwall, off Fowey, and 5 miles 

 off the Deadman (C. W. P.). 



DISTRIBUTION IN TIME. Red Crag, on shell (Searles 

 Wood). 



There is little variability in this very pretty species ; the 

 characters are marked and stable. The surface of both 

 the cell and ovicell is thickly and regularly punctured. 



