462 
ECHINODERMATA. 
inci%)\ G.helchet'if Grayj G.muelleri^ Gray (j=Dorigona reevesi, Gr.) ; G. 
duehenij Gr. ; Dorigona longimana, Gr. {Astrogonium longimamimj Gr.;=^. 
soideyetif Duj. & Hupp6), wrongly considered by Gray as G. equestris, var., may 
be a seventh species of Goniaster^ but is probably an Archaster. OphuUasterf 
Linckiuj and Scglaster are well-marked subgenera of this group, if not truly 
distinct, as are also Liaster, Pet., and Mitkrodiaj Gray. A synopsis of the 
known species of Linckia is given. The Echmodermata known from Nicobar 
are enumerated : — Asteridce 10, Ophiuridce 10, Crinoidcely Echinidce 5 — in all 
26 species. Scgtaster desjardinsi, Mich., perhaps = young form of S. tuhercu- 
latus, M. & Tr. Echinaster gracilis : a specimen doubtfully belonging to it de- 
scribed from New Zealand. Echinaster : the N.- American species are revised 
as follows : — E. hrasiliensisy M. & Tr. (P = Othidia midtispinay Gray) ; E. scidusy 
Say (=E. spmosusy M. & Tr.) ; E. spimdosusy Verr. ; E. crassispinusy Verr, ( = 
E. spinosusy Ltk.) ; E. serpentariusy M. & Tr. ; E. tenuispinuSy Verr. Acanth- 
aster : A. ellisi and solarisy Gray, and A. echiniteSy Ell., appear to be good 
species \ but further information on the genus is much required. Leptasterias 
and Coseinasteriasy Verr., Stichastet', M. & Tr., and Ileliaster, Uniojihoray and 
Margarastery Gray, are rather to be regarded as sections of Asterias than as 
genera ; Pgcnopodiay Stimps., is more distinct. Asterias stellionurusy Val., 
occurs in Spitsbergen, and probably not, as stated, in Iceland. Asterina chi- 
lensisy Ltk., is distinct from Asterias calcar atuSy Val. Finally, Liitken 
gives an index to all the Asteriidce mentioned in his papers in Vid. Medd. 
1856-1871, with the following additional synonyms : — Archaster tgpicusy 
M. & Tr. (m'cobaricuSy Behn) ; A. hesperuSy M. & Tr. {Stelluster sidcatuSy Mob.) j 
Astropecten muelleriy M. & Tr. {echinulatuSy M. & Tr.) ; A. asteCy Eil. {squamatusy 
M. & Tr.) y Asterina gihhosa, Put. {Asteriscus verruculatuSy M. & Tr. j ciliatuSy 
Lor.) j A. stelliferay Mob. (brasiliensis, Ltk.) j Oreaster gigaSy L. (O. reticulatuSy 
L, , aculeatusy Gr., lapidariiiSy Grube, tnherosiis, Behn) ; O. dorsatuSy L. (clavatuSy 
M. & Tr.) j O. armatuSy Gr. ( Goniodiscus armatnSy Ltk. j G. mieheliniy Perr. j 
conifer y Mob. &c.) j Goniaster acutus {placentifonnis')y Heller j Echinaster 
gracilisy M. & Tr. (rigidusy Grube ?) ; Chcetaster hngipes (Asterias canariensisy 
B’Orb.P), Crihella sanguinolentay Mull, {oculatciy Put., eschrichtiy&c.) ; Asterias 
ruhenSy L, (violaceus) ] A. tenuispinuSy Lmk. (^atlanticuSy\ei'v.)y A.problemay 
Stp. (albuluSy Stimpson). 
Uraster rnbenSy with a bifurcated restored limb : cf. 1). Robertson, P. N. II. 
Soc. Glasg. i. p. 41. 
Cribella rosea. Its rays, like those of U. glacialisy have a tendency to break 
oft* close to the disk : id. 1. c. p. 37. 
Asteracanthion rubensy Solaster papposusy and Asteropecten anrantiacus. The 
nerve which runs along the arm leaves the furrow before reaching the ex- 
tremity, and bifurcates, the lower branch extending to the eye, and the upper 
one terminating in a long extensile and partly ciliated feeler. The structure of 
this and the eye, and also that of the nervous, circulatory, and respiratory 
systems, is described by R. Greef, Ueber den Bau'der Echinodermen,” 
SB. Ges. Marb., Nov. 1871, abstracted Z. ges. Naturw. (2) iv. pp. 490 
&500. 
Solaster endeca with only 6 rays : cf. D. Robertson, 1. c. p. 37. 
Asterias {Leptasterias) y sp. n., from the coast of Amoorlaud, described 
but not named by Liitken, Vid. Medd. 1871, p. 298. 
