78 
Proceedings of the Royal Society 
Poly car ps numerous and large, yellow. 
Three specimens from Port Jackson, 6 to 15 fathoms. 
Poly ear pa quadrata , n. sp. 
External appearance. — Shape oblong or oval, erect, somewhat 
compressed laterally, both ends broad and rounded, dorsal and ven- 
tral edges nearly straight and parallel. Attached by the posterior 
end. Branchial aperture terminal, sessile, inconspicuous, minute; 
atrial more than one-third of the way down, on the dorsal edge, also 
minute and inconspicuous. Surface considerably creased in all 
directions, especially round the apertures. Colour dirty white. 
Length, 2 cm. ; breadth, 1 *6 cm. 
Test not thick, tough and strong, but not stiff ; white and glisten- 
ing on the inner surface. 
Mantle closely adhering to the test, very thin. 
Branchial sac with four slight folds on each side. Internal 
longitudinal bars very numerous and close in the places where they 
form the folds. Meshes vertically elongated, usually divided by a 
narrow horizontal membrane, and containing each one to three 
stigmata. 
Dorsal lamina plain. 
Tentacles simple. 
Olfactory tubercle ovate, very minute, placed at the posterior end 
of a deep peritubercular area. 
Polycarps few, only three or four on each side. Endocarps 
X2» 
numerous. Intestinal loop wide. 
Three specimens adhering to the spicules of Labaria hemispherica 
from Ki Island, 129 fathoms. 
Polyccirpa minuta , n. sp. 
External appearance. — Dome-shaped or nearly hemispherical ; 
anterior end convex, posterior wide, flattened, attached, slightly 
expanded at the margin. Apertures both anterior, not distant, 
sessile but distinct. Surface perfectly smooth and even. Colour 
pale yellowish-brown. Length, *6 cm. ; breadth, *9 cm. 
Test thin, but tough and strong. 
Mantle closely adhering to the test, very thin, 
