65 
of Edinburgh, Session 1880-81. 
Intestine rather narrow ; loop open. 
One specimen from Station 320 (off the coast of Buenos Ayres), 
600 fathoms. 
Styela oblonga , n. sp. 
External appearance. — Shape oblong, erect, broadest in the 
middle, tapering slightly towards the anterior end and more towards 
the posterior; anterior end straight, dorsal and ventral edges slightly 
convex ; posterior end by which it is attached narrow. Apertures 
four-lobed, sessile, placed at the extremities of the anterior end. 
Surface finely wrinkled and rough on rather more than the anterior 
half, smoother and slightly encrusted with sand on the posterior 
part. Colour yellowish-brown, dull on the anterior half, brighter 
posteriorly. Length, 3*5 cm. ; breadth, 2 cm. 
Test not thick, but tough on the upper part ; thinner below, 
except at the posterior end, where it is considerably thickened. 
Mantle thin, musculature very delicate. 
Branchial sac with four folds on each side, formed, as in the 
last species, merely by a crowding together of the internal longi- 
tudinal bars, six to nine being placed close together, and separated 
by wide spaces containing only three bars. Meshes elongated ver- 
tically, containing each only three stigmata, divided by a narrow 
horizontal membrane. 
Dorsal lamina narrow, much crumpled, neither ribbed nor 
toothed. 
Tentacles simple, rather large, twelve. 
Olfactory tubercle rather prominent, cup-shaped; opening anterior, 
wide. 
One specimen from Station 320 (off the coast of Buenos Ayres), 
600 fathoms. 
This species was probably buried in sand for nearly half its 
length. 
Styela glans , n. sp. 
External appearance. — Shape regular, between conical and 
hemispherical, the highest point at the ventral edge of the anterior 
