VoL. 2] Robertson.—Non-Incrusting Bryozoa. 285 
wide as the zowcial aperture, with lines radiating from the front 
rim; few in number. Rootlets (fig. 82, r.) springing from a disk 
on the side of most of the zocecia, just below where the branches 
arise. 
But one other species of this genus is described, viz., C. tenuis, 
Hineks (’88) from the St. Lawrence. As Hincks remarks, ‘‘the 
zocecia bear a strong resemblance to those of the genus Prettia, 
but the articulated avicularium is a link connecting it with 
Bugula.’’ The species C. spinosa has a decided resemblance to 
Bugula in that its zoccia approximate the boat shape typical for 
that genus. It seems also to bear a resemblance to Bugulella 
Vernll (779), but in Corynoporella the method of branching as 
well as the mode of union of the zocecia are distinctly different 
from that in this genus. 
Obtained from material from Alaska growing on a erab. 
Exact locality unknown. 
Notamiidae Hincks. 
Gemellariade (part) Busk, 1852. 
Notamiide Hincks, 1880. 
Zoecia in pairs, each pair arising by two tubular prolonga- 
tions, one from each member of the pair next below it; at each 
bifurcation a new series of zocecia intercalated into the branches. 
Synnotum Hincks. 
Notamia, Waters, 1885. 
Synnotum Hincks, 1886. 
Synnotum, Waters, 1896. 
Zoarium consisting of erect, slender, bifurcating shoots, at- 
tached by a mass of tubular fibres given off from the base of 
the primary zoecium. (Fig. 93.) Zowcia in pairs joined back 
to back, elongated, expanding from the base upward, the front 
surface occupied by a membranous aperture; sessile avicularia 
and an articulated avicularium between the zowcia in each pair 
at the summit. Owcia? 
