"Tab, IV, Fig. 4. 
Kjønsorganernes største Stamme; p Enden 
af et Rør, der deler sig i to. 
Et Stykke af Huden, hvori sees Kalk- 
legemer, forstørret. 
. Mundskiven med dens Tentakler. 
De hesteskodannede Kalklegemer med 
derés Knop paa Midten og Takker paa 
Enderne, forstørrede. 
Forskjelligtformede Kalkspikler i Kroppens 
- Hud, forstørrede. 
14. 
"Mad, Wo IMG, Ik 
— 2 
En krummet Spikel med Takker og 
bøiede Enter, forstørret. 
Et forgrenet Kalklegeme, forstørret. 
. Skivetormige, elliptiske Kalklegemer, for- 
størrede. 
. Spikler i Fødderne, forstørrede. 
Spikler i Tentaklerne, forstørrede. 
Fodenden med Spikelbeklædningen, for- 
størret. 
En Tentakel. seet fra Adoralsiden, for- 
størret. å Skaftet; b, b en Lap (For- 
længelse) paa Tentakelens brede, blad- 
formige Del; c, ¢ Indskjæringer, der dele 
Forlængelsen i tre Flige; d en midterste 
Flic. Saavel i Forlængelserne som i Fli- 
gerne sees Spikelbeklædningen. 
Et af Kalkringens 5 Stykker, forstørret. 
a Midtpartiet: b de 4 forreste krumme 
Stave, der udgaa fra Midtpartiet; c de 
to bagerste horizontaltløbende Stave; d de 
to bagerste skjævt lobende Stave. 
Myriotrochus Rinkii i naturlig. Størrelse. | 
Tvyersnit af dens Hud, forstørret. a Cuti- 
cula;. b Hpithel; ¢ Hyalint Bindevær; d 
Bindevævslegemer med to Udløbere; e 
Bindevævslegemer med tre Udløbere; f 
Kalkhjul; g Hjulets Centrum med den 
takkede Knop; h Tender paa Hjulperi-- 
pherien; 2 Indsnittet paa Tandens Basis: 
Fritstaaende Legemer i den øverste Del 
af Kropshulheden, svarende til de hos 
Synaptiderne, beskrevne af Grube m. Fl. 
forstørrede. 
Stenkanalen. a Et Stykke af Vandkar- 
ringen, hvori Stenkanalen udmunder, for- 
. størret. 
Tversnit af Huden hos Myriotrochus bre- 
vis, paa hvilket sees Cuticula, Epithellaget 
og w det hyalme Bindeveyslag med for- 
grenede Bindevævsceller; b, b det fibril- 
lære Bindevævslag; c, c hyalint Binde- 
vævslag med indleirede forgrenede Binde- 
vævslegemer; d Muskel; e Kalkhjul, for- 
størrede. i 
87 
Pl 
V, 
14. 
tral vessel of stomach; m do. of intestine; 
6 principal stem of generative organs: p 
extremity of a tube that divides dicho- 
tomously. 
A piece of the skin, in which are seen 
calcareous corpuscles; magnified. 
Oral disk with its tentacles. 
Horseshoe-shaped calcareous corpuscles with 
a knob in the middle and dentelli at the 
extremities, magnified. 
Calcareous spicules, of different form, in 
the skin of the body, magnified. 
A curyed spicule, with dentelli and bent 
extremities, magnified. 
Branched caleareous corpuscle, magnified, 
Discoido-elliptic calcareous corpuscles, mag- 
nified. 
Spicules in suckers, magnified. 
Spicules in tentacles, magnified. 
Extremity of sucker, with spicular covering, 
magnified. 
A tentacle, adoral aspect: a shaft; 6, b 
‘lobe (prolation) on the broad, leaf-shaped 
part of the tentacle; c, ¢ incisions dividing 
the prolation into three lobules; d a medial 
lobule. — The spicular covering is obvious 
alike in the prolations and the lobules. 
One of the 5 segments of the calcareous 
ring, magnified: @ medial.portion; b the 4 
anterior curved rods proceeding from the 
medial portion; c the two posterior hori- 
zontal rods; d the two posterior oblique rods. 
Myriotrochus Rinku, natural size: 
Transverse section of the skin, magnified: 
a cuticle; b epithelium; c hyaline connec- 
tive tissue; d corpuscles of connective tis- 
sue, each with two offshoots; e corpuscles 
of connective tissue with three offshoots; 
jf calcareous wheels; g centre of wheel with 
_ the dentate knob; h teeth on circumference 
of wheel; 2 incision on base of tooth. 
Free corpuscles in upper part of perivisce- 
ral cavity, corresponding to those in the 
Synaptide, described by Grube and other 
zoologists; magnified. ‘ 
The sand-canal: @ segment of water-vascu- 
lar ring through which the sand-canal 
disembogues, magnified. 
Transverse section of the skin in JMyrio- 
trochus brevis, showing cuticle, epithelial 
layer, and (a) the hyaline layer of connective 
tissue with ramous cells of do.; b, b fibril- 
lous layer of connective tissue; c, ¢ hyaline 
layer of connective tissue with embedded 
ramous corpuscles of connective tissue; d a 
muscle; e calcareous wheels, magnified. 
