238 mk. h. l. clabk on some 
Pentagonastek stibakus. 
H. L. Clark, 1914, Rec. Austral. Mus. i. p. 136. 
Two little pentagonal sea-stars from Pelsart Island appear to be the young 
of this species. The smaller is 17 mm. across, E. = 9 mm., and has 73 flat 
abactinal plates besides the madreporite, 4 superomarginals on each side, 
and a terminal plate on each ray, 99 plates altogether abactinally. The 
distal marginal plate on each side of each ray is the larger, but is not 
conspicuously enlarged. Orally there are 4 inferomarginals on each side, 
and the distal ones on each ray are noticeably larger than the proximal. 
There are 12 (on 2) or 13 (on 3) plates on each of the interradial areas, and 
there are 17 adambulacral plates on each furrow margin. The other 
specimen is a trifle larger (18'5 mm. across), but has onlj' 55 flat abactinal 
plates besides the 20 marginals^ 5 terminals, and madreporite, 81 plates 
altogether on the dorsal side. On the ventral surface there are 14 (in 
one area 15) plates in each interradial area. A few pedicellarise occur 
on the abactinal surface of each specimen, but there are none on the oral 
surface. 
That these little sea-stars are really the young of stibarus seems clear as a 
result of comparing them with the young of P. diibeni. The latter, have the 
abactinal plates swollen, the rays longer and narrower, and, at least in some 
cases, actinal pedicellarise are present. 
At Wooded Island a larger specimen of P. stibarus was taken, 27 mm. 
across, E.= 15 mm. There are only 4 marginal plates still in each series, on 
each side of the distinctly pentagonal sea-star ; the distal plate is distinctly 
the larger in every case, In a specimen of P. diibeni of the same size there 
are 40 superomarginals and 50 inferomarginals, 8 and 10 respectively on each 
side of the animal, which is not, however, at all pentagonal, since E is 
15 mm. and r only 8 mm. 
Stellastee inch. 
Gray, 1847, Proc. Zool. Soc. London, pt. xv. p. 76. 
Two specimens of this well-known sea-star were dredged off Long Island. 
The larger specimen has R = 90 mm. and the smaller 80 mm. There are 
2-4 low, blunt spine-like tubercles on the carinal line, on the disk at the 
base of each arm. The number and arrangement of the iiiferomarginal 
spines show great diversity ; whereas the number of inferomarginal plates 
is about 17 in each series, the number of spines ranges from 3 to 11. 
The present specimens have lost all colour. 
AnTHENEA AUSTRALIiE. 
Doderlein, 1915, Jalirb. Nassau. Ver. f. Naturk. Wiesbaden, Ixviii. p. 52. 
Two Antheneas may well be referred to this species. The genus is a 
perplexing one, and Doderlein's revision of it is a very admirable piece of 
