44 
THE VOYAGE OF H.M.S. CHALLENGER. 
is mentioned by Professor Leidy 1 as occurring in Urnatella, but I have not found it 
referred to by any other writers on the Pedicellinea. 
PL X. fig. 1, represents a group of buds at the end of one of the branches, and 
also shows the barrel-shaped expansion at the base of one of the peduncles, from which 
the transparent ringed covering has been partially loosened and torn off by the process of 
boiling. Figs. 3 to 5 on the same plate are taken from sketches made by the late Sir 
C. Wyville Thomson when the specimens were fresh and alive. 
(2) Ascopodaria discreta, n. sp. (PI. X. figs. 6-12). 
Character . — The zoarium consists of a creeping stoloniferous stem, jointed at 
intervals where the branches are given off or where the polypides arise. The deciduous 
polypides are seated at the upper end of slender chitinous pedicels, which are dilated 
below into barrel-shaped cylinders that have a thick, ringed, chitinous envelope, and 
exactly resemble those of the preceding species. The polypiferous peduncles are seated 
by a broad base on the stoloniform stems ; usually singly on the somewhat expanded 
jointed bifurcation of four branches (fig. 11), but sometimes scattered along the stolons 
(fig. 12). The chitinous pedicels are irregularly punctured by minute funnel-shaped 
pores. The polypides are united to the pedicels by a spirally ringed flexible joint (fig. 
12). The tentacles are from sixteen to twenty in number. The pedicels and stolons are 
of a bright brown, horny colour, the polypides white, and the barrels also white or very 
light brown, appearing darkest when quite young, the chitinous envelope becoming 
thinner and more transparent as the animal grows older. 
The total length varies considerably, apparently according to age ; the majority of 
the older ones measure as much as from 4 ’25 to 4 - 4 mm. The polypide being about 
0’5 x 0'4 mm., the pedicel 3‘0 x 0'6 mm., and the barrel 0'7 x 0*24 mm. This species 
is, therefore, on the whole, taller and more slender than the preceding one. 
Habitat . — Station 135, off Nightingale Island, Tristan da Cunha, 100 to 150 fathoms. 
There were very few specimens in all of this species in the collection, and, therefore, 
it has not been possible to enter into a full and minute examination of the polypide, but 
it appears to present all the usual Pedicelline characters. 
1 Journ. Acad. Nat. Sci. Philad., vol. ix. pt. i. p. 13. 
