BRITISH ZOOPHYTES. 221 



name of " the three-celled celluliferous Coralline/' as 

 "of a stony, semi-transparent nature, jointed, and 

 creeping. The joints are nearly top-shaped, with 

 angles (the avicularia) at their sides. They have three 

 cells in the front of each.'' Tbe cells are armed with 

 three short spines, two at the top and one a little 

 below. From some of the branches arise long tendrils, 

 with open extremities. 



2. M. Jef FREYSii, Norman. 



Hab. : Shetland {Peach). 



Described and figured from fragmentary specimens 

 by Rev. A. M. Norman in the Q. J. M. S., 1868 (N. S.), 

 viii. 213. 



There are 4 — 7 cells to an internode, and each cell 

 has a prominent aviculariutn below the aperture. 



Genus III. Scrupocellaria, Van Beneden. {Scrupus, 

 a stone, and cella, a cell.) 

 Zoarium jointed. Zooecia numerous in each inter- 

 node, rhomboid. Aperture with or without an oper- 

 culum. A sessile avicularium, placed laterally at the 

 upper and outer angle, and a vihraculmn in a bend or 

 sinus in the lower part of the dorsal surface. Fre- 

 quently an avicidariimi on the front of the cell. — T. H, 



Without an oijerculutn. 



1. S. SCRUPOSA, Linn. 



Sertularia scruposa {Linn.), Cellularia scruposa 

 {Pall, Flem., Beid, Switt, G.J., D.L.,R.Q.G.), Cellaria 

 scruposa {K and 8., Lamk, G. J., Base), Scruparia 

 scruposa {(Jken), Bicellaria scruposa {Be B.), B. rabo- 

 teuse {Be B.). 



Hab. : Generally distributed. 



This is the "Creeping Stony Coralline" of Ellis 



