s 
09 ‘* ENDEAVOUR” SCIENTIFIC RESULTS. 
OPHIOTHRIX SPONGICOLA, Stimpson. 
Ophiothrix spongicola, Stimpson, Proc. Acad. Nat. Sci. 
Philadelphia, vii., 1855, p. 385. 
These are typical specimens of this handsome and charac- 
teristically Australian species. It seems to me quite possible, 
however, that O. fumaria is really the proper name for this 
species, Muller and Troschel’s type having very probably been 
brought to Paris from Port Jackson, but never having had a 
locality label. Koehler’s careful description of it and_ his 
figures apply very closely to this species, more closely than 
to the specimen Mr. Lyman has called O. fumaria. In the 
ultimate revision of the genus, this matter should be given 
critical attention. Three specimens. 
Locs.—Shoalhaven Bight, New South Wales, 15-45 fathoms. 
Fifteen miles north-west of Cape Jervis, South Australia, 
17 fathoms. 
Genus OPHIOTHELA, Verrill. 
OPHIOTHELA HADRA, H. L. Clark. 
Ophiothela hadra, H. L. Clark, Mem. Mus. Comp. Zool. 
Harvard, xxv., 1915, p. 284. 
This is another species, previously known only from the 
holotype taken at the Murray Islands, Torres Strait. The 
present series shows that the original was immature, and the 
arms are not unusually short and stout in adults, though the 
general form is rather robust. The largest specimen at hand 
is 3mm. across the disk and the arms are 10-11 mm. long. 
Only the smallest specimens are as light as the holotype, all 
the larger specimens being prettily variegated with dull deep 
bluish, pink and pale cream-colour ; the centre of the disk, 
the sides of the arms and the arm spines are pink ; but there is 
some diversity. There is also some diversity in the armature 
of the disk, the larger interradial spine-like granules being 
often wanting. The oral shields are very small, nearly 
circular, white ; adoral plates larger than oral shield, but quite 
similar in form and colour, perfectly smooth, in close contact 
with each other. There are 5 arm spines at base of arm. 
The knobs on the upper arm plates are conspicuous. All of 
these specimens were taken from the primary spines of 
Sea-urchins (Prionocidaris australis); most of the smaller ones 
are reproducing by fission and have only 2, 3 or4 rays, but the 
adults are symmetrically 6-rayed. 
Loc.—Eleven miles south-east of Ballina, New South Wales, 
27-29 fathoms. 
