135 



Fiu 



10. 

 11. 

 12. 



13. 



14. 



15. 

 16. 



Tab. X. 

 Polyarfemia forcipata, Fit^cher. 



Hovedet af en Hun seet nedenfra. de sammen- 

 satte Øjne ; o det enkle Øie ; a " Iste Par Følere ; 

 a- 2det Par Følere: L Overhrben; M Kindbakkerne; 

 )/(', m' Kjæverne. 

 Hovedet af en Han, seet forfra. 

 F,n Foler af Iste Par. 



Overlæben med Spiserøret {&), seet fra venstre Side. 

 De samme Dele, seet ovenfra. 

 V.w Kindbakke, seet forfra. 

 Kn Kj;eve af Iste Par. 

 En Kjæve af 2det Par- 

 En Brancliialfod af Iste Par. 

 En Branchialfod af Ilte Par. 

 En Branchialfod af sidste Par. 



Pen bagre Del af Legemet af en fuldvoxen Hun, 

 med Ægbeholderen og de gjennemskinnende Ovarier, 

 seet fra høire Side. 



Ovarierne med Kitkj;ertelen, seet ovenfra, ov Ova- 

 rialtuberne; ovd Æglederne; gl Kitkjærtelen. 

 Et af Ovarierne med den tilsvarende Ægleder, isole- 

 ret og seet fra Siden. 

 Et modent Æg, stærkt forstørret. 

 Den bagre Del af Legemet, uden Haleiiladerne, af 

 en fuldvoxen Han, seet fra venstre Side. t Testes; 

 vd vas deferens; p ydre Kjonsvedhæng. 



Tab. XI. 



Lepidurus glacialis (Krøyer). 



Fia. 



1. 



la. 



2. 



6 a, 



Forstørrelse som 



Fuldvoxen Hun, ovenfra seet. 



Sanune i naturlig Størrelse. 



Sannue seet nedeirfra, i samme 



Fig. 1. 



Samme seet fra venstre Side, med Kroppen stærkt 



foroverbøiet. 



En Larve, seet ovenfra. 



En an<len Larve i et noget senere Stadium, seet 



ovenfra. 



Fuldvoxen Han, ovenfra seet. 



Samme i naturlig Størrelse. 



Tab. Xn. 

 Lepidurus glacialis (Ki-øyer.) 



Fig. 1. Forenden af Legemet, seet uedenfi'a. a' Iste Par 

 Folei-e; o^ 2det Par Følere; L Overlæben (opløftet); 

 M Kind) Kikkerne; I Underlæben; »»' Iste Par Kjæ- 

 ver; jh' 2det Par Kjrever; p^ Iste Fodpar. 



' 2. Eu Foler af Iste Par. 



» 3. Et Stykke af Endedelens netb-e Kant med de paa- 

 siddende Lugtepapiller, stærkere forstørret. 

 4. En Lugtepapille, meget stærkt forstørret. 

 6. En Føler af 2det Par. 

 6, 7. Samme Føler af 2 andre Fxemplarer, foi- at ^dse Ya- 

 riationeruft i Form og Størrelse. 

 > 8. En Kindbakke, seet forfra. 

 ' 9. Den inderste Tand af samme, stiorkt forstørret. 



■ 10. Underlæben {I"/ og Iste Par Kjæver (m') i sin natur- 

 lige Forbindelse med hluanden, tilligemed Spiserøret 

 {oe}, seet bagfra. 



Plate X. 



Pohjartemia forcipata, Fischer. 



Fig. 1. Head of a female, seen from below. 0, compound 

 eyes; o, ocellus; a', 1st pair of antennæ; a", 2nd pair 

 of antenna^: L. lal)runi: M. mandibles; >»', m". 

 maxillæ. 



» 2. Head of a male, seen from the front. 



» 3. One of the 1st pair of antenna;. 



• 4. Labrum, \wth oesophagus (ø), seen from the left. 

 > 5. Same parts, seen from above. 



» 6. A mandible, seen from the front. 

 » 7. One of the 1st pair of maxillæ. 



• 8, (.)ne of the 2nd pair of maxillæ. 



9 ( )ne of the 1st pair of branchial legs. 

 » 10. One of the 11th pair of branchial legs. 

 » 11. (.)ne of the last pair of branchial legs. 

 1 12. I'listerior part of body of a full-grown female, witli 



marsupium, and the ovaries shining tlu'ough, seen 



from the right. 



• 13. Ovaries with the glutinous gland, seen from above. 



ov. ovarial tubes; ovd, owluct; gl, glutinous gland, 

 i 14. Oue of the ovaries with its corresponding oviduct, 



isolated, and seen from the side. 

 1 1-5. A mature ovum, highly magnified. 

 ' 16. Posterior part of the body, without caudal lamellæ, 



of a full-grown male, seen from the left, t, testes; 



vd, vas deferens; p, external sexual appendage. 



Plate XI. 

 Lepidurus glacialis (Kroyer.) 



Fig.. 1. Full-grown female, seen from above. 

 5 1 a. Same, natural size. 

 > 2. Same, seen from l)elow, magnified with the same 



power as fig. 1. 

 3. Same, seen from the left, with the Ijody bent very 



much forwards 

 » 4. A larva, seen from alcove. 

 I 5. A lar\"a in a rather more advanced stage, seen fi-om 



above. 

 I' 6. Full-grown male, seen from al)Ove. 

 » 6 a. Same, natural size. 



Plate Xn. 



• Lepidurus glacialis (Krøyer.) 



Fig. 1. Anterior end of Ijody, seen from below, a', 1st pair 

 of antennæ; a', 2nd pair of antennæ; L, lalirum 

 (raised); M, mandibles; I, posterior lip; m', 1st pair 

 of maxillæ; w^ 2nd pair of maxillæ; ^J ', 1st pair 

 of legs. 



-■> 2. An antenna of the 1st pair. 



!■ 3. A piece of the lower edge of the terminal part, with 

 its olfactor}' papillæ, more highly magnified. 



> 4. An olfactory papilla, very much magnified. 



> 6. An antenna of the second pair. 



» 6, 7. Same antenna in 2 other specimens, to show the 

 variation in form and size. 



-1 8. A mandible seen froin the front. 



» 9. The innermost denticle of the same, highly mag- 

 nified. 



» 10. Posterior lip {I) and 1st pair of maxillæ (rø') in their 

 natural connection with one another, and æsopliagus 

 (oe), seen from beliind. 



