76 
Proceedings of the Royal Society 
One specimen from Station 163 (off the south-east coast of Aus- 
tralia), 120 fathoms; and one specimen from Port Jackson, 6 
fathoms. 
Polycarpa molguloides , n. sp. 
External appearance. — Shape transversely ovate or sausage- 
shaped ; elongated dorso-ventrally and depressed ; attached by the 
wide posterior end. Apertures distant, both on the anterior 
end (upper surface), inconspicuous. Surface entirely covered by a 
thick layer of sand, shells, &c. Colour dark-brown. Length 
(antero-posterior), 3 cm. ; breadth (dorso- ventral), 7 cm. ; thickness 
(lateral), 4 cm. 
Test moderately thick, leathery, covered with branched hair-like 
processes, like these of Molgula , to which the sand-grains, &c., are 
attached. 
^ Mantle closely adhering to the test, thick and rough, musculature 
feeble. 
Branchial sac with four folds on each side. Tranverse vessels all 
of one size. Six internal longitudinal bars on the folds, and four 
on the interspace. Meshes transversely elongated, containing each 
twelve stigmata. 
Dorsal lamina plain. 
Tentacles numerous, crowded, all one length, of a dark-brown 
colour. 
Poly carps only slightly projecting, imbedded in the thick mantle. 
Two specimens from Station 162 (Bass’ Straits), 38 to 40 
fathoms. 
Polycarpa rigida i n. sp. 
External appearance. — Shape oblong, erect, anterior end pointed, 
dorsal and ventral edges nearly straight and parallel, posterior end 
nearly straight, moderately wide ; attached by the posterior end. 
Branchial aperture terminal, projecting; atrial on the dorsal edge, 
fully one-third of the way down, projecting; both very indistinctly 
lohed. Surface even, hut roughish, and partly covered by foreign 
bodies. Colour dull greyish-brown, dull yellow round the apertures. 
Length, 8 cm. ; breadth, 3 cm. 
