for de dorsale, og hver enkelt Pigs Skede bærer paa sin 
ydre Flades øverste Del, ligeved Randen, en korsformet 
Pedicellarie, Fig. 3, f. 5, a, der rager saa langt ud, at 
den godt kan sees fra Rygsiden; kun paa en Skede saaes 
to Pedicellarier. 
De korsformede Pedicellarier have en bred Stilk. De 
ere meget smaa, men omgivne åf en temmelig vid Mem- 
løgn, 188, 3, jo 
Kjæverne ere langs hele Midten af den ydre Flade forsy- 
nede med Alveoler, Fig. 6, a, og deres bredeste, nederste 
Del er temmelig spidsvinklet, Fig. 6,6. Randene, ligesom 
den indre Flade, ere tæt besatte med stærke Tænder. Den 
forlængede Del har paa sin fri, afstumpede Endes ydre 
Basaldelen frembyder intet NSæregent. 
Flade en liden Gruppe Takker, Fig. 6, c. 
Bugen er flad. Ambulacralfuren, der er temmelig bred, 
4 Rækker eylindriske Fødder uden Spikler; dens Rande 
paa Armens indre Del forsynede med 2 Rækker Pigge, 
7; derimod paa Midten er der afvexlende 2 og 1, 
Fig. 5, 0, og paa den ydre Trediedel af de fleste Arme er 
der kun I Række Ambulacralpigge, Fig. 7, c. 
Langs Ambulacralfuren, paa Randens indre Væg, sees 
meget smaa, ligeformede, kortstilkede Pedicellarier, der dels 
staa enkeltvis, dels 2—3 sammen. Deres Basaldel er tre- 
kantet, Fig. 8, a, med en næsten tvers afskaaren øverste 
Rand. Kjæverne ere langstrakte med en noget til Siderne 
hvælvet Overflade; Randene og den indre Flade fint sag- 
takkede, Fig. 8. 
Mundpladerne ere temmelig lange og smale, have paa 
Midten 2 lange, stærke Tænder, Fig. 7, b, og paa hver 
Siderand 4 lange Pigge, Fig: 7,a, der hver bærer paa Spid- 
sen en korsformet Pedicellarie. Paa Mundpladernes Under- 
flade enkelte smaa Pigge, Fig. 7. 
Ryggens Hudskelet bestaar af et meget vidmasket Kalk- 
Det dannes af smaa, smale, aflange Kalkstykker, der 
taglagt lægge sig paa hverandre, hvorved fremkommer lange 
Kalkbjelker, Fig. 9, a; og der, hvor Maskerne bindes sam- 
net. 
men, er et større, mere eller mindre rundt Kalkstykke, som 
Langs Mid- 
ydre Trediedel ordne Kalkstykkerne sig 1 
Række, Fig. 9, c, der strækker sig ned til 
store Ocularplade, Fig. 9, d. 
bærer en af de førbeskrevne Pigge, Fig. 9,0. 
ten af Armens 
en regelmæssig 
den forholdsvis 
Randpladerne ere langstrakte, ovale og have paa sin 
ydre, hvælvede Flade en Leddeflade for Randpiggen, Fig. 9, e. 
Farven ‘er gulrød paa Ryggen, hvor Piggene med 
6 
situated directly opposite to the dorso-marginal spines. The 
sheath of each individual spine, carries, on its superior, exter- 
ior surface, close to the margin, a cruciform pedicellaria 
(fig. 3, f, 5, a), which projects so much, that it is easily visible 
from the abactinal side. Upon only one sheath did we 
find two pedicellariæ. 
The cruciform pedicellaria have a broad peduncle; 
they are very small, and are surrounded by a rather wide 
membrane (fig. 3, f). The basal portion presents nothing 
noteworthy. Along the entire mesial surface, the jaws are 
furnished with alveoli (fig. 6, a), and their broadest, in- 
ferior portion, forms a rather acute angle (fig. 6, 5). The 
margins, as, also, the interior surface are closely beset with 
strong teeth. The elongate portion has a small group of 
spikes, situated, on the exterior surface of its blunted free 
extremity (fig. 6, ¢). 
1 
The actinal surface is flat. The ambulacral furrow 
is rather broad, and is furnished with four series of eylind- 
rical suckers devoid of spiculæ; the margin on the diskal 
part of the rays, is furnished with two series of spines, 
(fig. 7), whilst on the mesial part of the rays, the spines 
occur, 2, and 1, alternately (fig. 5, 0), and upon the distal 
third part of most rays, there is only one series of ambul- 
acral spines (fig. 7, ¢). 
Along the ambulacral furrow, on its internal marginal 
wall, very small, rectiform, short pedunculated, pedicellariæ 
are seen, placed, partly, singly, and partly, 2—3 together. 
The basal portion is trilateral in form (fig. 8, a), with a 
nearly truly-truncate superior margin. The jaws are elon- 
gate, and have a somewhat laterally placed, rounded, su- 
perior surface. Their margins and internal surface are 
minutely serrated (fig. 8). 
The oral plates are rather long, and narrow, and in 
their mesial part, are furnished with 2 long strong teeth 
(fig. 7, 6), and on each lateral margin, with 4 long spines 
(fig. 7, a), all of which, carry a cruciform pedicellaria on 
the pointed extremity. On the inferior surface of the oral 
lates, a few small spines occur (fig. 7). 
] p) to} 
The abactinal dermal skeleton consists, of a very wide 
meshed calcarous reticulation, formed, of small, narrow, 
oblong, calcareous ossicles, which he imbricate upon each: 
other, producing thus, long calcareous rods (fig. 9, a). 
At the point where the meshes become connected together, 
there is found, a largish, more or less round, calcar- 
eous piece, carrying one of the spines previously described 
(fig. 9, b). Along the mesial line of the distal third of 
the ray, the calcareous ossicles arrange themselves in 
regular series (fig. 9, c), extending down to the propor- 
tionally large ocular plate (fig. 9, d). 
The marginal plates are elongate, ovate, and upon 
their exterior convex surface, have an articulatory surface 
for the marginal spine (fig. 9, e). 
The colour is orange on the abactinal surface, where 
