the Genera and Species of Starfish. 977 
7. Pentaceros Franklinii. Rays elongate, as long as the width of 
the body, with a dorsal series of broad blunt tubercles; back high, 
with very large spines at each angle, margin not armed. 
Var.1. With one or two conical tubercles on each side of the tu- 
bercles, near the one at the angle of the central dorsal disk. 
Inhab. Coast of New Holland. G. Bennett, Esq. 
See also Pentaceros turritus, Linck, t. 22. 23. f. 3. Like the 
former, but the back is more spinose, and the spines are not so large. 
8. Pentaceros muricatus, Linck, t.7.f.8. Ast. Linckii, Blainv. A. 
nodosa, Lam. Seba, iii. t. 7. f. 3. Arms elongated, nearly as long as 
the width of the body, with a dorsal series of large, and with 2 or 
3 large conical spines near the tips; back rather high, spinose. 
Inhab.: . Brit. Mus. 
b? Back formed of irregular flat-topped ossicula, placed in rows so 
as to appear nearly tessellated ; arms elongated, rather narrow. 
9. Pentaceros nodosa. Asterias nodosa, Gmelin (part), Seba, iii. 
t.8.f. 11, 12. (t.5. f. 11, 12. without spines on the margin?) Arms 
with a double series of hemispherical tubercles; back rather depressed ; 
marginal ossicula unequal, lower one with small blunt conical spines. 
Inhab. Isle of France. W. FE. Leach, M.D. 
c. Back formed of regular rounded ossicula, placed in rows ; back 
rather low. 
10. Pentaceros aculeatus, Seba, iii. t.5. f.5.6. With 3 ridges of 
small spine-bearing tubercles; back rather depressed, with three 
small spines at the angles ; marginal ossicules rounded, with conical 
tubercles. 
Var.? or younger? Spine-bearing ossicula further apart, with the 
skin and granulations worn off and bleached, Seba, iii. t. 7. f. 1. 
Inhab. West Indies, St. Vincent’s. Rev. L. Guilding. 
See also Pentaceros spinosa. Ast. nodosa (part), Gmel. Seba, iii. 
t. 5. f. 7, 8., and var. Seba, ii. t. 7. f. I, 2. Ossicula oblong, with 
2 or 3 small conical tubercles. 
d. Back regularly convex, formed of flat granular ossicula with a 
blunt mobile spine on the centre of each ossicule below ; arms short, 
broad. Nidorellia. 
11. Pentaceros armatus, Gray. Arms short, broad, the lower mar- 
ginal and the 3 last upper marginal plates at the top with short 
blunt spines ; back convex, with central and lateral groups and a se- 
ries of spines down each arm. Young more convex ; spines shorter, 
blunter and fewer. Younger not so convex, without any marginal 
spines, and only indications of them on the back. 
Inhab. Punta Santa Elena. Rock ground, 12 to 15 fathoms. 
H. Cuming, Esq. 
3. STELLASTER. Gray. 
Body depressed, covered with large flat regular six-sided plates, 
margin with 2 rows of large tessere; the lower rows with a series 
of compressed mobile spines. 
