Tab. X. 
Polyartemia forcipata, Fischer. 
‘Hovedet af en Hun seet nedenfra. O de sammen- 
satte @jne; o det enkle Mie; a Iste Par Folere; 
a® 2det Par Folere; Z Overleeben; M Kindbakkerne; 
m', m® Kjeeverne. 
Hovedet af en Han, seet forfra. 
En Foler af iste Par. 
Overleben med Spisergret (¢), seet fra venstre Side. 
De samme Dele, seet ovenfra. 
En Kindbakke, seet forfra. 
En Kjeve af iste Par, 
En Kjeeve af 2det Par- 
En Branchialfod af 1ste Par. 
En Branchialfod af 11te Par. 
En Branchialfod af sidste Par. 
Den bagre Del af Legemet af en fuldvoxen Hun; 
med Agbeholderen og de gjennemskinnende Ovarier, 
seet fra hoire Side. 
Oyarierne med Kitkjeertelen, seet ovenfra. 
A rialtuberne; ovd Aglederne; gl Kitkjeertelen. 
Et af Ovarierne med den tilsvarende Mgleder, isole- 
ret og seet fra Siden. 
Et modent Ag, steerkt forstorret. 
Den bagre Del af Legemet, uden Halepladerne, af 
en fuldyoxen Han, seet fra venstre Side. 
vd vas deferens; p ydre Kjonsvedheeng. 
“www ww ve oe vy wy 
ov Ova- 
vow 
eet 
So 
t Testes; 
Tab. XI. 
 . Lepidurus glacialis (Kroyer). 
Fig. 1. Fuldyoxen Hun, ovenfra seet. 
> 1a. Samme i naturlig Storrelse. 
2. Samme seet nedenfra, 
ie Ege: 
Samme seet fra vere Side, med Kroppen steerkt 
foroverbgiet. 
En Larve, seet ovenfra. 
En anden Larve i et noget senere Stadium, seet 
oyenfra. 
Fuldyoxen Han, bvbatea seet. 
Samme i naturlig Storrelse. 
ie i samme Forsterrelse som 
‘Tab. XII. 
Lepidurus glacialis (Kroyer.) 
Forenden af Legemet, seet nedenfra. a‘ iste Par 
Folere; a* 2det Par Folere; DL Overleeben (oploftet); 
M Kindbakkerne; J Underleben; m* iste Par Kjx- 
ver; m* 2det Par eee p* iste Fodpar. 
, En Foler af iste Par. 
Et Stykke af Endedelens nedre Kant med de paa- 
siddende Lugtepapiller, sterkere forsterret. 
En Lugtepapille, meget steerkt forstorret. 
fn En Foler af 2det Par. 
6, 7. Samme Foler af 2. andre, Fxemplarer, for at vise Va- 
riationerne i Form og Storrelse. 
8. En Kindbakke, seet forfra, 
9. Den inderste, Tand af samme, steerkt forstorret. 
og. lete Es Kjeever (m 2) i sin natur- 
ge Forbincelee ane hinanden, snaprene Mere Spiseroret 
(o seet bagfra, — r a 
135 
| 
Fig. 1. 
OK 
> 8. 
>» 4, 
Ee ae 
| > 6. 
oP) Ap) IT. 
>» 8. 
> 9. 
> 10. 
IDS 
een 
> 13. 
ay st. 
>» 16. 
> 16. 
Fig. 1. 
> ole 
wo D 
> 38. 
at; Sy 
ae nb, 
> 6. 
>» 6a 
Fig. 1. 
+ aan 
& %3. 
» 4 
> 6 
> 6,7 
> 8B. 
> 9% 
>» 10. 
Plate X. 
Polyartemia forcipata, Vischer. 
Head of a female, seen from below. O, compound 
eyes; 0, ocellus; a‘, Ist pair of antenns; a*, 2nd pair 
of antenne; Z, labrum; M, mandibles; m', m?, 
maxillze. 
Head of a male, seen from the front.. 
One of the Ist pair of antennze. 
Labrum, with cesophagus (9), seen from the left. 
Same parts, seen from above. 
A mandible, seen from the front. 
One of the Ist pair of maxille. 
One of the 2nd pair of maxille. 
One of the 1st pair of branchial legs. 
One of the 11th pair of branchial legs. 
One of the last pair of branchial legs. 
Posterior part of body of a full-grown female, with 
marsupium, and the ovaries shining through, seen 
from the right. 
Ovaries with the glutinous gland, seen from above. 
ov, ovarial tubes; ovd, oviduct; gl, glutinous gland. 
One of the ovaries with its corresponding oviduct, 
isolated, and seen from the side. 
A mature ovum, highly magnified. 
Posterior part of the body, without caudal lamellie, 
of a full-grown male, seen from the left. f¢, testes; 
vd, vas deferens; p, external sexual appendage. 
Plate XI. 
Lepidurus glacialis (Kroyer.) 
Full-grown female, seen from above. 
. Same, natural size. 
Same, seen from below, magnified with the same 
power as fig. 1. 
Same, seen from the left, with the body bent very 
much forwards 
A larva, seen from above. 
A larva in a rather more advanced stage, seen from 
above. 
Full-grown male, seen from above. 
. Same, natural size. 
Plate XII. 
Lepidurus glacialis (Kroyer. 
Anterior end of body, seen from below. a', Ist pair 
of antennie; a*, 2nd pair of antenne; LD, labrum 
(raised); M, mandibles; 1, posterior lip; m', 1st pair 
of maxille; m*, 2nd pair of maxille; p', Ist pair 
of legs. 
An antenna of the Ist pair, 
A piece of the lower edge of the terminal part, with 
its olfactory papillee, more highly magnified. 
An olfactory papilla, very much magnified. 
“An antenna of the second pair, 
. Same antenna in 2 other specimens, to show the 
variation in form. and size. 
A mandible seen from the front. 
The innermost denticle of the same, highly mag- 
nified. 
Posterior lip (2) and Ist pair | of maxillee (m") in their 
natural _connection with ope ‘another, and cesophagus 
(oe), seen. from behind, 
ay 
