Tab. XIII, Fig. 5. Den samme Pig med sit membranøse 
Hylster, forstørret. a, Basaldelens Led- 
flade; 6, Kalkgitteret; c, membranøse 
Hylster; d, listeformige Rande paa den 
undre Flade af Hylsteret; e, Beltet 
imellem disse Rande. 
Hymenaster pellucidus, aabnet fra Ryg- 
gen; den indre Ryghud borttaget, na- 
turlig Størrelse. a, de lange Kalknaale, 
der udspænde Bughuden; b, Blindtarme; 
c, Aiggestokke; d, deres Udførselsgang. 
Centralpartiet af Ryggen; saavel den 
ydre som den indre Ryghud borttaget, 
forstørret. æ den aflange Anus; 0, de 
store Kalkplader ved Siden af Anus; 
c, Grupper af mindre Kalkplader ved 
Anus; d, de 5 øverste Interbrachial- 
plader, der danne Kalkringen om Anal- 
feltet; e, de 5 underste Interbrachial- 
plader; f, de 5 Analpaxiller; g, det 
første Par Armpaxiller; h, deres Ba- 
saldel; 7, Madreporpladen. 
To af de overste Interbrachialplader, 1 
Analpaxille og det forste Par Armpax- 
iller, forstorret. a, Interbrachialpladens 
Midtparti; 
c, dens underste, ydre Proces; d, en 
Analpaxille med dens 4 Rødder; ee, 
dens inderste Rodder; f, dens ydre Rød- 
der; g, det første Par Armpaxiller; h, 
Naalene paa Analpaxillen; 7, Skaftet 
paa det første Par Armpaxiller; k, det 
første Par Armpaxillers indre Rod; 1, 
deres ydre Rodder; im, Buen, som disse 
Rødder danne; m, underste Proces af 
de øverste Interbrachialplader; 0, indre 
Rod af første Par Armpaxiller; p, Naa- 
lene paa det første Par Armpaxiller. 
Et Stykke af 2 Arme med øverste og 
inderste Interbrachialplade samt Paxil- 
b, dens øverste Processer; 
ler, udpræpareret og forstørret. a, øverste 
Interbrachialplades Midtparti; 0, øverste 
Processer; c, underste Processer; d, un- 
derste Interbrachialplades  Midtparti; 
e, dens øverste Sideprocesser; /f, dens 
midterste Proces; g, den forlængede 
Midtdel (Proces) af den overste Inter- 
brachialplade; h, underste Interbrachi- 
i, dens 
indre 
alplades undre Nideprocesser; 
undre Midtproces; Å, Armens 
Paxiller; J, dens ydre Paxiller; m, den 
ydre Rod at de ydre Paxillers Basaldel, mn, 
den indre Rod; 0, Ambulacralpladernes 
Tverprocesser; p, den ydre Rod af Ar- 
mens ydre Paxiller; g, sammes indre 
Rod; 7, Paxillens Naale; s, Basaldelen 
Pl. XIII, fig. 
DOT 
Bo 
its membranous 
a, The basal part’s arti- 
b, The calcareous erating. 
d, Fillet-formed 
margins on the inferior surface of the casing. 
e, The border between these margins. 
Hymenaster pellucidus, opened from the 
abactinal surface and the inner integu- 
a, The long 
caleareous needles, which expand the ven- 
b, Ceca. 
The same spine, with 
casing; magnified. 
culatory surface. 
c, The membranous casing. 
ment removed; natural size. 
tral ifttegument. c, Ovaries. d, 
The duct. 
Mesial dorsal part; the imterior and ex- 
terior integument removed; magnified. «a, 
The oblong anus. 6, The large calcareous 
plates, in proximity tothe anus. c¢, Groups 
of smaller calcareous plates, in proximity 
d, The 5 superior interbrach- 
the ring 
around the anal area. e, The 5 inferior in- 
terbrachial plates. jf, The 5 anal paxillæ. 
g, The first pair of brachial paxillæ. h, 
to the anus. 
ial plates forming calcareous 
Their basal part. 7, The madreporite. 
Two of the superior interbrachial plates, 
with 1 anal paxilla, and the first pair of 
brachial paxillæ; magnified. «a, Interbrach- 
ial plate’s mesial part. 0, It’s superior pro- 
cess. c, It’s inferior exterior process. d, An 
anal paxilla with it’s 4 roots. e, It’s inner 
roots. f, It’s outer roots. g, The first pair 
of brachial paxille. h, The needles of the 
anal paxilla. 7, The shaft of the first pair 
of brachial paxillæ. &, Inner root of the first 
pair of brachial paxille. /, Their outer 
m, The are formed by these roots. 
n, Inferior process of the superior inter- 
0, Inner root of the first 
pair of brachial paxillæ. p, The needles 
of the first pair of brachial paxillæ. 
A portion of 2 rays, with the superior 
roots. 
brachial plates. 
and inferior interbrachial plate, and pax- 
illæ, dissected, and magnified. a, The superior 
interbrachial plate’s mesial part, 0, Super- 
ior processes. d, In- 
ferior interbrachial plate’s mesial part. e, 
The superior lateral process. jf, The mes- 
g, The elongated mesial part 
c, Inferior processes. 
ial process. 
(process) of the superior interbrachial plate. 
h, The inferior interbrachial plate’s infer- 
ior lateral processes. 7, It’s inferior mesial 
k, Inner paxille of the ray. J, 
m, Exterior root of 
process. 
The outer paxillæ. 
the outer paxilla's basal part. m, The in- 
0, Transverse processes of the 
p, The interior root of 
terior root. 
ambulacral plates. 
q, Interior root of 
of the 
the ray’s outer paxille. 
the same. 7, Needles paxillæ. 
