SEA LILIES, STARFISHES, ETC.—CLARK. 57 
Family ASTERINIDAL. 
Genus AsTERINA, Nardo. 
ASTERINA ATYPHOIDA,! sp. nov. 
(Plate xvii., fig. 1-2.) 
Remarkably similar to A. modesta, Verrill, from Panama. 
On the upper surface the only difference is in the coarser 
granulation of the plates in the Australian specimens. Actin- 
ally the difference is somewhat more marked ; the adambu- 
lacral plates almost never have more than one subambulacral 
spine, while in A. modesta two such spines are often, if not 
usually, present; the actinal intermediate plates near the 
margin have only a single spine while in A. modesta there are 
two and occasionally three. The largest specimen of 4A. 
atyphoida is 19 mm. across; R=10 mm., and r=8.5 mm. 
Colour (dry), light brown or whitish. Four specimens. 
The resemblance between these South Australian Asterinas 
and specimens of A. modesta from Panama is very extra- 
ordinary, whether one regards it as indication of genetic 
relationship or as a case of parallelism. In either case, the 
degree of difference is very slight in view of the fact that 
several other species of Asterina occur in the vast intervening 
distance between the homes of the two species. It is obvious- 
ly impossible, without far more data and specimens than are 
now available, to determine what the relationship between 
them really is. 
Locs.—¥Fifteen miles north-west of Cape Jervis, South 
Australia, 17 fathoms. This specimen has been selected as 
the holotype. 
Off Cape Marsden, Kangaroo Island, South Australia, 17 
fathoms. 
ASTERINA LEPTALACANTHA,2 Sp. nov. 
(Plate xviii., fig. 3-4.) 
R=18mm.; r=8 mm.; R=2.25r. Br=9mm..; R= 
2br. Brat middle of ray=7 mm. ; at tip,3mm. Disk and 
trays moderately arched, but general appearance flattened ; 
margin formed by the conspicuous inferomarginals. Abacti- 
nal plates as usual in Asterina, more or less markedly 
1. drugos=the Latin modestus+éidos=form ; in reference to the 
resemblance to A. modesta, Verrill. 
2. NertaXeos—fine, slender+ dxav@a=thorn, spine; in reference te 
the very fine spines on the inferomarginal plates. 
