274 Mr. W. S. M. D'Urban on the 



Genus Porina, D'Orbigny. 



Porina tubulosa, Norman. 



On stones off Bear Island, 25 fms. [St. Lawrence, Daw- 

 son.] 



Genus Myriozoum. 



Myriozoum subgracile, D'Orb. 



Lat. 75° 16' 6" N., long. 45° 19' 36" E., 160 fms. Lat. 

 75° 36' 3" N., long. 57° 6' 7" E. {Marenzeller) . 



Genus Schizoporella, Hincks. 

 Schizoporella sinuosa, Busk. 



On stones, lat. 72° 55' N., long. 37° 57' 18" E., in 150 fms. 

 [St. Lawrence, Dawson.] 



Schizoporella plana, Dawson ( = Myriozoum crustaceum, 

 Smitt) . 



Off Bear Island. [St. Lawrence, Daioson.] 



Schizoporella hyalina, L. 

 On stones off Bear Island, 25 fms. 



Genus Porella, Gray. 

 Porella struma, Norman. 



Lat. 73° 41' 6" N., long. 22° 58' 30" E., in 220 fms. 



The habit of growth in the only Barents-Sea specimen is 

 Hemescharine ; and the dorsal surface of the zooecia is furnished 

 with one or more spinous projections, often of some length. 



[North of the Shetland group ; Bergen (No?'man).] 



Genus Phylactella, Hincks. 

 Phylactella ? grandis, n. sp. 

 Lat. 75° 16' 6" N., long. 48° 19' 26" E., 160 fms. 



Genus Mucronella, Hincks. 

 Mucronella scutulata, Busk. 

 On stones, lat. 75° 16' 6" N., long. 45° 19' 36" E., 160 fms. 



Mucronella simplex, n. sp. 

 On stones, lat. 75° 16' 6" N., long. 45° 19' 36" E., 160 fms. 



