Randpigge, samt imellem disse og de dorsale Randpigge, er 
tæt besat med ligeformede Pedicellarier, Fig. 2, 0. 
Langs Ambulacralfuren, ved Grunden af Papillerne, 
sees enkeltstaaende, meget store, langstilkede, ligeformede 
Pedicellarier, der rage ind i Furen. 
Hvad nu Pedicellarierne betræffer, saavel de lige som 
korsdannede, saa skulle vi til Sammenligning levere et Par 
Tegninger af dem, men forresten henvise til Ed. Perrier's 
Beskrivelse af dem; kun er at bemærke, at den pyramide- 
formige Forlængelse af Basaldelen hos de ligedannede Pe- 
dicellarier ikke ender 1 en Spids, saaledes som Perrier har 
fundet det paa de Exemplarer, han har undersøgt, men at 
Enden er afrundet og forsynet med en dyb Fure, Fig. 6, a. 
Hudskelettet paa Ryggen af Armene er sammensat af 
meget smaa, lidt aflange, smale Kalkstykker, der taglagt 
lægge sig paa hverandre og danne derved spinkle Bjelker, 
som netformigt forene sig saaledes, at meget store Masker 
fremkomme, hvori sees Grupper af Kalkkorn, imellem hvilke 
findes Tentakelporerne, Fig. 7, a, b. 
Paa Skivens Ryg ere Kalkstykkerne større, Maskerne 
noget tættere, Tentakelporerne færre, og 1 dens Centrum 
antage Kalkbjelkerne en vis Regelmæssighed, idet de ud- 
gaa fra et Centrum henimod Peripherien, Fig. 7, c. 
Paa Armenes Sider, just der, hvor udvendig den be- 
skrevne Række Pigge, som begrændser Rygfladen, findes, 
sees en Række smaa, flade, noget forskjelligt formede Pla- 
der, der snart ere aflange, snart 3-kantede og snart nær- 
mende sig Korsformen; men alle bære de en Pig, der, som 
tidligere omtalt, er omgiven af en Krands korsdannede Pe- 
dicellarier. Disse Plader kunne betragtes som dorsale 
Randplader, Fig. 7, d. 
Bugens Hudskelet bestaar af en Række langt fra hver- 
andre staaende, næsten korsformede, større Kalkplader, Fig. 
7, e. 8, som paa Enden af Korsets ydre Arm, Fig. 8, a, 
bære en lang, stærk Pig, halvt omsluttet af Pedicellarier, 
Korsets indre Arm, Fig. 8,0, 
lægger sig umiddelbart til 2—3 Adambulaeralplader, idet 
der imellem disse og hin er placeret en lille, lidt aflang, 
tynd, konkav-konvex Kalkplade, Fig. 9, der ved stærke Li- 
gamenter er bunden til begge. Paa den indre Flade (den, 
der vender til Kropshulheden) af disse korsformede Plader, 
henimod det egentlige Skelet, sees dels et enkelt, lille Kalk- 
stykke, dels flere smaa, næsten runde Kalkklumper, Fig. 7, 9, 
der støde i Regelen til to Adambulaeralplader, saa at disse 
heller ikke her staa i umiddelbar Forbindelse med de 
nævnte korsdannede Kalkplader, som kunne betragtes som 
ventrale Randplader. Disse forenes stundom med de dor- 
sale Randplader ved et lille, smalt Kalkstykke, stundom 
der tidligere ere beskrevne. 
16 
ventro-marginal spines, and also, between these and the dor- 
so-marginal spines is closely beset with rectiform pedicel- 
lariæ (fig. 2, 0). 
Along the ambulacral furrow, at the base of the pap- 
illæ, occasional, very large, solitary, long pedunculated, rec- 
tiform pedicellarize, protruding into the furrow, are to be 
seen. 
In regard to the pedicellariæ forcepiformes, both 
rectiform and cruciform, we present a couple of illustrat- 
ions to facilitate a comparison; but, we would refer to 
Ed. Perrier’s description of them, remarking only, that the 
pyramidal continuation of the basal portion in the recti- 
form pedicellariæ, does not terminate in a point, as Per- 
rier has observed in the specimens he has examined, but 
that the extremity is rounded, and furnished with a deep 
furrow (fig. 6, a). 
The abactinal dermal skeleton of the rays is constructed, 
of very small, somewhat elongate, narrow calcareous os- 
sicles, laid imbricate upon each other, and form, thus, 
slender rods which unite in such a reticulation, that very 
large meshes are produced; in these meshes, groups of 
caleareous corpuscles are seen, between which, tentacular 
Uy @ Ok 
On the disk’s abactinal surface the calcareous ossicles 
are larger; the meshes closer; the tentacular pores less num- 
erous; and, in the mesial portion, the calcareous rods as- 
sume a certain regularity of disposition, m as much, that 
they here proceed from a common centre towards the] per- 
iphery, fig. 7, c. 
pores are found (fig. 
On the lateral surfaces of the rays, just outside where 
the spinous series bordering the abactinal surface ‘is found, 
there appears, a series of small, flat, dissimilar formed 
plates, occurring, sometimes oblong, sometimes tri-lateral, and 
occasionally, approaching to the eruei-form, but all of them 
carrying one spine, which as previously stated is environed 
by a wreath of cruciform pedicellarie forcepiformes. — 
These plates may be considered to be dorso-marginal plates 
(fig. 7, d). 
The ventro dermal skeleton is composed, of a series 
of considerably interspaced, largish, nearly cruciform, cal- 
careous plates (figs. 7 e, 8), which carry on the exterior 
brachial extremity of the cross, a long strong spine, (fig. 8, a) 
which is semi-enclosed by the pedicellariz previously de- 
scribed. The inner arm of the cross, does not quite 
closely abut, with 2—3 adambulacral plates; there being sit- 
uated between these and the former, a small, somewhat 
oblong, thin, concayo-conyex calcareous plate fig. 9 which 
is connected to both, by strong ligaments. On the interior 
surface of these nearly cruciform plates, (that facing to- 
wards the body cavity) towards the skeleton-proper, there 
appears, occasionally, a single small calcareous ossiele, 
occasionally, several, small, almost round, calcareous corpus- 
cles (fig. 7, g) which, as a rule, abut with 2 adambula- 
cral plates, in such manner, that neither do they im this 
situation, stand in immediate union with the cruciform cal- 
