134 



Fij;. 7. En af de paa samme fæstede Borster, stferkt for- 

 størret. 



8. F:n Kjseve at 2det Par. 



9. Ell Branchialfod at If-te Par hosHminen; end Endo- 

 podit; ex Exopodit; ep Epipodit: h Basalplade. 



i 10. Et Stykke af Kanterne af den inderste Endit med de 

 tilhørende lefonnigt krunmiede Burster, stærkere for- 

 størret. 



11. En Branchialfod af 5te Par. Bokstaverne som paa 

 Fig. 9. 



12. En Branchialfod af sidste Par. 



13. En Branclualfod af 6te Par hos Hannen. Bogstaverne 

 som paa Fig. 9, 1 1 og 12. 



Tab. VIII. 



Branchinecfa paludosa (Miiller). 



Fig. 1. Legemet af en Hun, med indtegnet Nervesystem, seet 

 fra Bugsiden. 



2. Enilen af en Foler af Iste Par, stærkt forstørret. 



3. I<;n Lugt(>papille fra samme, endnn stierkere for- 

 storret. 



4. Hjei'ne.gangliet med de fra samme udspringende Ner- 

 ver, seet ovenfi-a. o det enlde Øie; aa Sandsegniber 

 i Hovedets Integument; æ' Basis af Iste Par Følere 

 med den tilsvarende Nerve ; Synsnerverne ; a^ Ner- 

 verne for 2det Par Følere. 



6. Et Stykke af Buggangliekiieden. 



6. Den ydre Del af et af de sammensatte Oine i 

 L;engdesnit. 



7. 2 Synselementer isolerede. d Nervetilirer fra Syns- 

 nerven; c Synsstav; 6 Krystalkegle ; a lindseformigt 

 fortykkct Del af samme. 



8. Sidedelen af et Halesegment, med 2 Hudnerver. 



9. Hu<lpapiller med Folehorster, stierkt forstørret. 



10. Den forreste Del af Tarmen med sine 2 Blindsiekke, 

 seet ovenfra. 



11. Genitalsegmentet af en Hun med ^Eglieholdei-en og 

 Ovarierne (ov), seet nedenfra. 



12. Et Stykke af Kitkjtertelen. 



. 13. Et Æg med begyndende Kløvning. 



14. Et andet .Eg uden Klovning. 



15. En Larve i et af de tidligere Stadier, seet fra Bug- 

 siden. 



16. En Larve i et senere Stadium, seet fra Bugsiden. 



17. Forendeu af Legemet hos et lidt senere Larvestadium, 

 seet nedenfra. O de sammensatte Øine; o det enkle 

 Øie; a> Iste Par Følere; a' 2det Par Følere ; L Over- 

 heben; Af Kindl)akkerne; p Mandibularfodderne; m', 

 ni' Kjæverne. 



Tab. IX. 

 Polyartemia forcipata, Fischer. 



Fig. 1. Fuldvo.xen, ægliærende Hun, seet fra hoire Side. 



2. Samme, seet ovenfra. 



3. Fuldvoxen Han, seet nedenfra. 

 i 4. Samme fra venstre Side. 



6. Spidsen af en af Gribeantennernes Grene, stæi-kere 



forstørret. 

 6. Enden af Halen med Ilaleiiladerne, seet ovenfra. 

 1 7. En Larve i et at' de tidligere Stadier, seet nedenfra. 



Fig. 7. One of the bristles attached to the same, higldy 

 magnified. 



* 8. A maxilla of the 2nd pair. 



1 9. A lirancliial leg of the 1st pair in tlie female; cud, 

 endopodite; ex, exopodite; ep, ejiipodite; 6, liasal 

 lamella. 



10. A piece of the edge of the innermost endite Avith 

 its falciformly curved liristles, more highly magnified. 



11. A lirancliial leg of the 5th pair. Lettering as in 

 tig 9. 



• 12. A branchial leg of the last pair. 



13. A branclual leg of the 5tli jiair in the male. Let- 

 tering as in Kgs. 9, 11 and 12. 



Plate VIII. 



Branchinecta paludosa (Miiller). 



Fig. 1. Body of a female witli the nervous system drawn in, 

 seen from the ventral side. 



2. Extremity tif one of the 1st pair of antenna", highly 

 magnified. 



3. An olfat'tory jiapilla on the same, still more highly 

 magnified. 



4 Cerebral ganglion with the nerves issuing from it, 

 seen from above, o, ocellus; aa, sensory pits in tlie 

 integument of the head; n', base of the flnst pair of 

 antennæ, with the corresponding nerves; 0, optic 

 nerves; a^, niTVes for the 2nd pair of antennæ. 



5 A piece of the ventral ganglion chain. 



6. The outer jiart of one of the compound eyes in 

 longitudinal section. 



7. Two visual elements isolated, d. uvvw fibres from 

 the optic neiTe; c, optic rod; b, crystalline cone; 

 a, lenticularly thickened part of the same. 



8. Lateral part of a tail-segment, with 2 euticular 

 nerves. 



> 9. Cutaneous papilla', with sensory bristles, highly mag- 

 nified. 

 10. The anterior part of the inti'stine with its 2 cæca, 

 seen from above. 

 . 11 The genital segment of a female with marsupium 



and ovaries {ov), seen from below. 

 » 12. A piece of the glutinous gland, 

 i 13. An egg with cleavage commenced. 

 14. An egg without cleavage. 



15- A larva in one of the earlier stages, seen fnim the 

 ventral side. 



16. A larva in a later stage, seen from the ventral side. 



17. Anterior end of the body in a rather more advanced 

 larval stage, seen fi'om lielow. 0, compound eyes; 

 0, ocellus; a', 1st pair of antennæ; a', 2nd pair of 

 antennic; L, lalirum; M, mandililes; p, mandibular 

 legs; m', »»^ maxillic. 



Plate IX. 

 Polyartemia forcipata Fischer. 



1. Full-grown, ovigerous female, seen from the right. 



2. Same, seen from above. 



3. Full-grown male, seen from lu'low. 



4. Same, from the left. 



5. Point of one of the rami of the prehensile antenna', 

 mure lughly magnified. 



0. End of tail, with the caudal lamelhe, seen from above. 

 7. A larva in one of the earlier stages, seen from below. 



Fig 



