No. 7.] HINCKS— NEW SPECIES POLYZOA. 389 



times a smaller number), situated on the upper half of the cell, 

 pointed, slender, suberect, jointed to a tubular base; a sessile 

 avicularium on the margin at one side (often absent), just below 

 the top, beak sloping upwards, scarcely bent at the extremity, 

 mandible blunt, directed obliquely outwards. Ooecia (?) 



Loc. Houston-Stewart Channel. Queen Charlotte Islands, en- 

 veloping Cellaria horealis, Busk, with a very thin crust \Dr. G. 

 M. Dawson). 



MEMBRANIPORA CONFERTA, N. SP. 



Zocecia oval, quincuncial, set closely together, front wall wholly 

 membranous, margin thin, smooth; on each side about 4 sharply 

 pointed spines, and (often) a central one below, which bend rather 

 abruptly over the area and meet in the middle ; an avicularium 

 at each side on the margin, just below the upper end, slightly 

 raised, pointed, the mandible directed upwards, a small erect 

 spine below the avicularia ; at the bottom of the cell a single 

 pointed aviculariinn with triangular mandible variously turned, 

 Ocbcium rounded, smooth, with a variously shaped depressed 

 area (or fossa) in front, composed of thinner material than the 

 rest of the surface, and appearing dark-colored as compared with 

 the surrounding dense white crust. 



Loc. Houston-Stewart Channel, Queen Charlotte Islands (^Dr. 

 G. M. Dawson). 



ME31BRANIP0RA LEVATA, N. SP. 



Zooecia small, oval, distinct, quincuncial, margin very slightly 

 raised, thin, smooth, the whole front closed in by a smooth, light- 

 colored, and rather glossy membrane, which lies very much on 

 a level with the edge of the cell ; above each zooecium, on a 

 somewhat quadrate area, a small nodule, with ;i pointed avicu- 

 larium on one side of it, the mandible directed transversely up- 

 wards. Ooecium rounded, smooth, umbonate. 



Loc. Houston-Stewart Channel, Queen Charlotte Islands (^Dr. 

 G. M. Dawson). 



MEMBRANIPORA ECHINUS, N. SP. 



Zooecia quincuncial, oval, distinct, separated by rather deep 

 interspaces, 2 spines at the top and 7-8 slender, pointed, and 

 rather tall spines down each side, which slant inwards but do 

 not meet in the centre; on each side, springing from below the 

 second spine from the top, a pedicellate avicularium, the upper 

 part large and much swollen (closely resembling a " bird's 



