Forklaring over Figurerne. Explanation of the Plates. 
Tab. I, Fig. 1. Kolga hyalina i naturlig Størrelse, seet | PI. I, fig.. 1. Kolga hyalina, natural size. side aspect: 
Å fra Siden. a Rygkraven; b Analaabningen. | a dorsal collar; b anal opening. 
— 2. Kolga hyalina i naturlig Størrelse, seet — 2. Kolga hyalina, natural size, ventral aspect: 
fra Bugsiden. a Mundaabning; % Tentakel: 
ce Fod; d Fodampalle; e Muskelbaand; Sf 
Længdémuskel med den gjennemskinnende 
Radialnerve. 
. Kolga  hyalina' i naturlig Størrelse, seet 
fra Siden. 
. Kolga hyalina i forkortet Stilline. 
. Kolga hyalina, seet halvt fra Bug-, halvt 
fra Rygsiden. 
. Mundskiven 'med sine Tentakler, lidt for- 
størret. | 
. En Tentakel med sine 5, Lapper, enhver 
Lap delt 1 3 Flige, forstørret. 
. Kolga hyalina, aabnet fra Ryggen; den 
forreste Del af Kropshuderi .slaaet op, for- 
storret. a' Maven;' b Indsnittet mellem 
Maven og Tarmen;.c Iste Tarmslynge; d 
2den; e 3die Tarmslynge; wu Svælgsinus; 
g Kloakens Tragtform; h Kloaken; 7 
Stenkanalen; Æ dennes Tilfæstning til 
Kropshuden; I Kravens Diaphragma med 
dettes Aabninger; m Blodkarringen, der 
, omgiver Svælget; nm Rygkarret ved sit Ud- 
spring fra Ringkarret:; 0, 0 Rygkarret paa 
første og sidste. Tarmslynge; p Anastomo-: 
ser imellem Bugkarrets Grene; g Kjøns- 
organets Ligament; 7, s de to Stammer af 
Kjønsorganet; ¢ Udførselsgangen for dette; 
f Kloaken. . 
a 
. En Del af Vandkarsystemet, seet-fra Bue- 
siden, forstørret. a, a Kalkringens Styk- 
ker, liggende i deres naturlige Leie; b 
Vandkarringen; c, c Hovedstammer; d 
deres Deling i 2; e, e deres Deling i 3; 
f Poliske Blære. — 
10. Et Stykke af Huden med dens Kalk- 
«1 
a oral opening; b a tentacle; c a sucker; 
d pedal ampulla; e muscular band; jf one 
of the longitudinal muscles with radial 
nerve shining through. 
Kolga hyalina, natural size, lateral aspect. 
- Kolga hyalina, foreshortened. 
Kolga hyalina, partly ventral, partly dor- 
sal aspect. 
Oral disk with tentacles, slightly magnified. 
A. tentacle’ with its 5 lobes, each lobe 
divided into 3 lobules; magnified. 
Kolgw hyalina, opened dorsally; «anterior 
part of integument folded back; magnified: 
a ventricle: b incision between the ven- 
trigle and the intestine; c Ist convolution 
of intestine; d 2nd; e 3rd; w pharyngeal 
sinus; g funnel-shaped aspect of cloacum: 
h cloacum; 7 sand-canal; Å attachment of 
latter organ to skin of body; ( dia- 
phragm of collar with the openings; m ring 
of blood vessels encircling æsophagus; m dor- 
sal vessel at point of origin from the annular 
vessel; 0, 0 dorsal vessel on first and last 
convolutions of the intestine; p anastomosing 
branches between the dorsal and ventral 
vessels; g ligament of generative organ; 7, 
s the two stems of the generative organ; 
t eferent duct from the latter; f cloacum. 
Part of the aquiferous system, ventral 
aspect; magnified: a, å segments of cal- 
careous ring in situ; b water-vascular ring; 
c, 6 its principal stems; d their dichotom- 
ous, e, € their trichotomous division; f | 
vesicle of Poli. 
— 10. A piece of the skin “with. its calcareous 
