723 
of Edinburgh, Session 1879-80. 
Edeinasddia must, on account of its property of forming colonies 
by gemmation, and having no papillae on its branchial sac, be 
included in the Clavelinidje, but it differs from Clavelina in pos- 
sessing well-marked internal longitudinal bars. In this last 
character it approaches Ciona and Rhopaloea, from both of which 
it differs in the absence of papillae. 
Edemascidia , crassa , n. sp. 
External appearance. — Shape irregular, rudely triangular; attached 
by extended base to clump of sponge spicules. Anterior end more 
or less rounded ; sides irregular. Both apertures sessile, near or at 
anterior end. Surface rather irregular. Colour yellowish-grey. 
Length, 2 cm.; breadth along base, 3*5 cm. 
Test enormously thickened. 
Mantle strongly developed. Muscle bands thick. 
Branchial sac crumpled. Internal longitudinal bars fine, undu- 
lating, borne on large pyramidal ducts. No papillse. Stigmata 
elongated. 
Dorsal lamina languets. 
Viscera extending considerably beyond branchial sac, and forming 
a distinct abdomen. 
Two specimens attached to the spicules of a large sponge (Labaria 
hemisphoerica ) from Station 192 (Ki Island) ; 129 fathoms. 
Edeinasddia fusca, n. sp. 
External appearance. — Individuals united by a short, thick, irre- 
gular stolon, which looks merely like a continuation of their posterior 
extremities. Shape very elongated, some specimens rudely club- 
shaped ; anterior end wide, truncated ; posterior half narrower, 
contorted, passing down into the stolon. Apertures nearly terminal, 
both placed on the right side of the extremity ; branchial near the 
middle ; atrial near the dorsal edge. Surface smooth but uneven, 
especially at the posterior end, where knobs and processes are 
formed. Colour dark brown. Length, 5 cm. ; breadth, 1 -5 cm. 
Test thickish, especially on the posterior part ; vessels present. 
Mantle thin ; muscular fibres distant, but well marked, and of a 
reddish-brown colour. 
