of Edinburgh, Session 1880 - 81 . 
75 
Mantle muscular, united to the test, of a dull green colour. 
Branchial sac with four folds on each side. Three small trans- 
verse vessels between each pair of large ones. * About eight internal 
longitudinal bars on the folds and four in the interspace. Meshes 
transversely elongated, containing each nine to twelve stigmata. 
Dorsal lamina narrow, not ribbed, margin plain. 
Tentacles simple, filiform, crowded, about seventy, long and short 
alternately. 
Olfactory tubercle rudely circular in outline ; left horn coiled out- 
wards, the right inwards. 
Polycarps numerous, on the inner surface of the mantle, 1 to 
3 mm. in length. 
Several specimens from Port Jackson, at depths of 6, 2 to 10, 
and 6 to 15 fathoms. 
Poly car pa radicatus , n. sp. 
External appearance. — Club-shaped, erect; consisting of a globu- 
lar body, supported on a narrow stalk equalling it in length. 
Anterior end rather broader than posterior, which is continuous 
with the stalk ; edges convex ; stalk long and narrow, spreading out 
somewhat at the lower end, where it is attached. Apertures both 
at the anterior end, sessile, inconspicuous, lobes indistinct ; branchial 
on the ventral edge of the anterior end, atrial about the centre, and 
slightly the more anterior of the two. Surface even, slightly sandy. 
Colour dull greyish-yellow. Length (total), 3*5 cm. ; breadth, L7 
cm. ; length of body, 2 cm. 
Test moderately thick, strong but not stiff. 
Mantle closely united to test, thin. 
Branchial sac with four folds on each side. Three narrow trans- 
verse vessels between each pair of wide ones. Internal longitudinal 
bars ribbon-like, close and numerous on the folds, few between. 
Meshes transversely elongated, and containing each six to twelve 
stigmata. 
Dorsal lamina narrow. 
Tentacles simple, numerous, about fifty, crowded, of different 
sizes, but not alternating. 
Olfactory tubercle circular, one end turned out and one turned in. 
Poly carps well-marked, yellow. 
