SEA LILIES, STARFISHES, ETC.—CLARK. 79) 
Genus OpuHtocrEas, Lyman. 
OPHIOCREAS PHANERUM,! sp. nov. 
(Plate xxxiil., fig. 1-2.) 
Disk 18 mm. in diameter ; arms 380 mm. long ; arms about 
20 times the disk-diameter. Disk and arms encased in a 
smooth, thick skin, which even when dry, shows no sign of 
calcareous plates or granules and more or less conceals the 
radial shields and arm-joints. In young specimens the skin 
is, of course, much thinner and when dry conceals very little. 
Radial shields narrow and convex, not closely approximate in 
pairs ; in young specimens, they are flat and are in rather 
closely joined pairs. Genital slits small (about 3 mm. long), 
deeply sunken. Tentacle-pores quite small; first 2 pairs on 
arm, naked ; succeeding pores, all guarded by a pair of short, 
flattened, rough spines; where largest (at about middle of 
arm) the inner spine is 2 mm. long, .80 mm. wide, pointed and 
prickly for more than half its length ; the outer is 1.5 mm. 
long by .45 mm. wide and neither as flat, nor as pointed, nor 
as rough as the inner. The skin of the side of the arm en- 
cases the basal half of the spines and so forms a thin but con- 
spicuous wall along each side of the lower surface of the arm ; 
this occurs in many if not all species of Ophiocreas. Basal 
arm-tentacles not encased in cuticular tubes. Teeth only 
6, triangular and very thick ; no tooth papillz or oral papille 
in the adult; in young specimens, a very few tooth papille 
are present. Colour (in alcohol or dry), deep red-purple ; 
young specimens somewhat lighter. Fourteen specimens. 
This species can be distinguished at a glance from any 
Ophiocreas, of which I know, by the remarkably short and 
flattened tentacle-scales or arm-spines and the small number 
of teeth. Although the young specimens (disk=7 mm.; 
arms about 90-100 mm.) were taken much further north than 
any of the adults, I see no reason to feel any doubts as to their 
identity, the short arm-spines are so characteristic. The 
chief growth-changes appear to be the thickening of the skin,. 
the entire loss of tooth-papille and the separation and convex 
thickening of the radial shields. In a specimen with disk- 
diameter 13 mm., these changes are complete. 
Locs.—Twenty miles off Cape Barren, Cape Barren Island, 
Tasmania, 70 fathoms. 
East of Flinders Island, Bass Strait, 80-300 fathoms. 
Eastern Slope, Bass Strait, 70-100 fathoms. 
Hight miles east of Sandon Bluffs, New South Wales, 
35-40 fathoms. 
1. Gavepos=manifest, evident ; in reference to the species being so: 
well characterised. 
