ker, Fig. 8, c, der forene sig med Kalknettet 1 Skivens 
Omkreds. 
Langs Midten af Armene er en Række store, kors- 
dannede, taglagte Plader, som ere konvexe udad, hvor de 
bære en Pig, og lidt konkave mdad, Fig. 8, e; den ydre, 
perpendikulære Forlængelse er meget lang, og til de korte 
Tverforlængelser støde de før omtalte kortere eller længere 
Kalkbjelker. 
Mange af de ovenfor beskrevne Kalkstykker have paa 
sin ydre Flade 1 eller 2, knopformige Forhøminger, i hvis 
Midte er en rund Fordybning, hvori Piggen fæstes ved et 
Ligament. 
Paa Siden af Armen, der hvor Grændsen afstikkes 
imellem Ryg og Bug ved den tidligere omtalte Pigrække, 
sees indvendig paa Hudskelettet en Rad korsdannede Kalk- 
stykker, Fig. 8,7. 9, der ligge med deres korte, perpendi- 
kulære Arme taglagte paa hverandre, strække sig fra Ski- 
ven langs hele Armen til dennes Spids, aftagende 1 Stør- 
relse og bærende paa sin ydre Flade en stærk Pig. Disse 
Kalkstykker kunne betragtes som dorsale Randplader. 
Bugtladens Hudskelet bestaar af en Rad Kalkstykker, 
der i Form nærme sig overmaade meget de nys ovenfor 
beskrevne korsdannede. Disse Kalkplader støde med sin 
mdre, temmelig stumpe, fladtrykte Arm umiddelbart til 
Adambulacralpladerne; de perpendikulære Arme ligge tag- 
lagte paa hverandre, og den ydre (undre) Flade bærer 1, 
stundom 2, stærke Pigge, Fig. 8,g. Imellem disse to Ræk- 
ker korsdannede Kalkplader er der en Række aflange, 
smale, lidt fladtrykte Kalkstykker, der fæste sig til de 
nævnte korsdannede Pladers Tverarme og kunne ansees for 
de ventrale Randplader, Fig. 8, h. Disse bære ingen Pig. 
Ligesom Hudskelettet afviger noget fra det hos Asterias 
glacialis og rubens, saaledes afviger ogsaa det egentlige 
Skelet fra disse to Arter. 
Ambulacralpladerne have temmelig lange, brede Tver- 
processer, der med sin gaffelformige Ende ganske skjuler 
Adambulaeralpladerne. 
runde Skiver med en tvers 
omfattes af Ambulacralpladens gaffelformige Ende, og en 
lidt afrundet, undre Rand, der bærer 3—4 Pigge (Fure- 
Der er intet Interbrachialrum. 
Disse ere smaa, fladtrykte, næsten 
afskaaren øverste Rand, som 
papiller). 
Odontophoren er temmelig kort, uden Apophyser, bred 
indad mod Munden, smal udad med et Indsnit paa Mid- 
ten. Sidefladerne skraa. 
Farven. 
Ryggen mørk, teglstensrød. Bugen hvidgul. 
AD 
abut radially, (fig. 8,0) and unite with the reticulation 
within the diskal compass. 
Along the brachial mesial line, there is a series of 
large, cruciform, imbricate plates, convex, externally, on 
which surface they carry a spine, and slighly concave in- 
ternally (fig. 8, e). The exterior perpendicular prolonga- 
tion is very long, and, the shorter or longer calcareous rods 
previously spoken of, abut on the short transverse prolonga- 
tions. 
Many of the above described calcareous ossicles, have, 
on their external surface, I or 2 knob-shaped promin- 
ences, in whose middle there is situated a circular cavity, 
in which the spine is secured by a ligament. 
On the lateral surfaces of the rays, there, where the 
margin between the abactinal and actinal surfaces is de- 
fined by the series of spines previously spoken of, there 
is visible inside the dermal skeleton, a series of cruciform 
calcareous ossicles, (fig. 8, /. 9) placed with their short arms 
imbricate upon each other, and extending along the whole 
ray, from the disk to the point, diminishing gradually in 
size, and carrying a stout spine on the external surface. 
These calcareous ossicles may be considered to be dorso- 
marginal plates. 
The dermal skeleton of the actinal surface, consists of 
a series of calcareous pieces, which, in shape, approach 
very closely, to the just lately described cruciform plates. 
These calcareous pieces abut, by means of their imner, ra- 
ther obtuse, flattened arm, close to the adambulacral plates ; 
the perpendicular arms lie imbricate each other 
and the exterior (inferior) surface, carries 1, sometimes 2 
spines (fig. 8, g). of cruciform 
calcareous plates, there is a series of oblong, narrow, 
slightly flattened, calcareous pieces, which attach them- 
upon 
Between these two series 
selves to the cross-arms of the cruciform plates referred to, 
and these may be considered to be ventro-marginal plates 
(fig. 8, h). These carry no spines. Just as the dermal 
skeleton differs somewhat, from that of Asterzas glactalis and 
Asterias rubens, so also, does the skeleton-proper differ from 
that of these two species. 
The ambulacral plates, have, rather long, broad, trans- 
verse processes, which quite conceal the adambulaeral plates, 
with their bifurcated extremities. These latter plates are 
small, flattened, nearly circular disks, with a truncate sup- 
erior margin, which is included in the bifurcated extremity 
of the ambulacral plates; and with a slightly rounded, infer- 
ior margin, carrying 3—4 spines (furrow-papillæ). There is 
no interbrachial space. 
The Odontophore is rather short, and without apo- 
physes; broad internally towards the oral aperture; narrow 
externally ; and having a medial groove; the lateral sur- 
faces sloping. 
Colour. 
Abactinal surface, dark brick-red. Actinal surface 
whity-yellow. 
