Vo. 2] Robertson.—Non-Incrusting Bryozoa. 249 
Zoecia joined back to back, each pair arising from the anterior 
extremity of the preceding pair. Aperture large, sloping 
slightly upward. Oacia? 
4. Gemellaria loricata (Linneus) Savigny. 
Pl. V, figs. 10, 11. 
Sertularia loricata Linn., 1758, ed. 10, p. 815. 
Cellularia loricata, Pallas, 1766, p. 64. 
Coat of Mail Coralline Ellis, 1767, p. 40, Pl. XXI, figs. b, B. 
Cellaria loricata, Ell. & Sol., 1786, p. 24. 
Notamia loriculata, Farre, 1837, p. 413, Pl. XX VII, figs. 6-9. 
Gemellaria loriculata, Savigny, 1811, Egypt. Polyp. 
Gemellaria loriculata, Van Beneden, 1844, p. 33, Pl. V, figs. 1-7. 
Gemellaria loricata, Johnston, 1847, ed. II, p. 293, Pl XLVI, 
figs. 12, 13. 
Gemellaria loriculata, d’Orbigny, 1850, p. 46. 
Gemellaria loricata, Busk, 1852, pt. I, p. 34, Pl. XLV, figs. 5, 6. 
Gemellaria loricata, Smitt, 1867, pp. 286 and 324, Pl. XVII, fig. 54. 
Gemellaria loricata, Hineks, 1880, p. 18, Pl. ITI, figs. 1-4. 
Zoarium forming densely bushy masses, 50 or 75 mm. in 
height, made up of numerous long, straight branches; branching 
dichotomous (Pl. V, fig. 10). Zoacia narrowed below, widen- 
ing above; aperture (fig. 11, ap.) oval, occupying about half the 
front, sloping somewhat toward the top, with a thin, raised, un- 
armed margin; operculum (op.) semicircular, at the anterior 
edge of the aperture. Colony attached by numerous rootlets. 
Main stem of colony thicker below. 
This species is found only on the northern shores. It is 
abundant at Orea, Prince Willams Sound, where it was taken 
from shore rocks at low tide; at Juneau, it was dredged at 20 
fathoms. Hinecks reports it from Queen Charlotte Islands. 
Cellulariidae Busk. 
Escharide (part) Johnston, 1847. 
Cabereade Busk, 1852. 
Cellulariade Busk, 1852. 
Cellularie Smitt, 1867. 
Cellulartide, Hincks, 1880. 
Zoarium erect, branching dichotomous. Zowcia in two or 
more series, closely united in the same plane; avicularia and 
