SEA LILIES, STARFISHES, ETC.—CLARK. 95 
Japanese and Tasmanian forms under the same name. The 
New Zealand species, P. cylindrica, is undoubtedly a very 
near relation but seems to be a smaller form, with arm spines 
and arm plates somewhat different. Lyman’s P. arenosa from 
Bass Strait and Bell’s P. assimilis from Port Jackson seem 
to be quite distinct, but it must be granted that the five 
species form a very homogeneous group. 
The “ Endeavour” specimens show plainly that in P. 
dyscrita at least the relative as well as the actual arm-length 
increases markedly with age; in the smallest specimen the 
disk-diameter (D) is 10 mm., the arm length (A) 40 mm., and 
hence A=4D, while in another D=12, A=60, D=5A, and 
in the largest specimen, D=20, A=140, D=7A. There is 
some diversity in colour indicated; the arms are often 
banded with brownish, or dirty whitish, and in one case there 
are 5 or 6 transverse bands, dorsally, of rose-purple. The 
colour in life is probably white, dull yellow, or pale brown, 
with rose-purple markings, spots or bands. Fourteen speci- 
mens. 
Locs.—North-east of Cape Pillar, Tasmania, 80 fathoms. 
East of Maria Island, Tasmania, 78-128 fathoms. 
East of Babel Island, Bass Strait, 65-70 fathoms. 
East of Flinders Island, Bass Strait, 80-300 fathoms. 
Off Gabo Island, Victoria, 200 fathoms. 
Family OPHIOCHITONIDA. 
Genus OPHIONEREIS, Liitken. 
OPHIONEREIS SCHAYERI (Miller and Troschel). 
Ophiolepis schayeri, Miller and Troschel, Arch. f. Naturg., 
x.i, 1844, p. 182. 
Ophionereis schayeri, Liitken, Add. ad Hist. Oph., pt. 2, 
1859, p. 110. 
This is a very small specimen, only 4.5 mm. across the disk, 
but it is not otherwise notable. 
Loc.—Between Devonport and Launceston, Tasmania. 
ECHINOIDEA. 
The collection of Sea-urchins made by the “ Endeavour’ 
strengthens the evidence in support of the opinion formed 
by study of the ‘‘Thetis”’ collection, that EKchini are relatively 
unusually common in the waters of Southern Australia. 
Considering the fact that there are rather more than one 
5 J 
