138 



Fit;'. 3. En Foil af Iste Par: 1 — 5 Emlopnilitcn med sme Eii- 

 (liter; ex Exopoditen; fix' dens' dorsale Lap; ep Epi- 

 poditeu; mx Coxallappen. 



4. En Coxallap ipoleret og sta>i-kere forstui-ret, sect fra 

 Indsiden. 



5. En Fod af sidste i'23dej Par, ved .«amme Forstørrelse 

 .«om Fig. 3. 



6. Samme Fod, stærkere forstørret. 



7. Bagenden af Legemet, seet fra ven.stre Side. 



8. Halen seet bagfra. 



9. Hjernegangliet med de fra samme udgaaonde Nerver 

 og det enkle Øie, seet fra venstre Side. c selve Hjerne- 

 gangliet; opt Synsnerven; n' Nerver for Iste Par Fø- 

 lere; a^ Nerver forAarerne; oe det enkle Øie; x det- 

 tes forreste Ligament. 



10. Hjernegangliet tilligemed de sanmiensatte Øine fO), 

 seet ovenfra, m Øiemnskler. De ovrige Bogstaver 

 som paa foregaaende Figur. 



11. Det enkle Øie seet forfra. 



12. Samme bagfra. 



13. Samme nedenfra. 



14. En De! af Buggangliekjæden, seet nedenfra. 



15. Et Ovarium af et ganske ungt Individ. 



16. Et Ovarium af et ;eldre Individ, kort efter at xEg- 

 gene fra Folliklerne er indkonnncn i I )varialroret. 

 x Æglederen. 



17. Kt Stykke af et andet Ovarium, med Ægfollikler i 

 forskjellig Uilvikling. 



18. Forskjellige Ægfollikler, isolcrede. 



19. VA Æg ndtaget af Ovarialrørene. Skallen har netop 

 liegymlt at danne sig. 



•iO— 22. Et fuldfærdigt Æg med sin Kapsel, seet i 3 for- 

 skjellige Stillinger. 

 ' 23. Et Stykke af den ene vingeformige 1'dvidning af 

 Ægkapselen, stferkt forstøi-ret. 



Tab. XVn. 



Limnadia Jentiailaris, Lin.) 



(T^dviklingl 



Fig. 1. En netop udklwkket Larve, seet nedenfra, oe det 

 enkle Øie; a' Iste Par Følere; a* 2det Par Følere 

 (Aarerne); Mp Mandibularfodderne; L OverLTben; 

 f Halein<lsnittet. 



2. En Larve efter Iste Hudskiftning, ovenfra seet. 



3. Ældre Larve seet nedenfra. 



4. Et senere Stadium, paa hvilket det første Ankeg til 

 de sammensatte Øine, Rygskjoldet og Fodderne kan 

 adskilles, seet ovenfra. 



6. -Eldre Larve, seet nedenfra. 



oa. En Føler af Iste Par, stærkt forstørret. 



6. Et noget ældre Stadium, seet fra venstre Side. Ven- 

 stre Aare er udeladt. 



7. Sidste Larvestadium, ovenfra seet. 



8. ITnge i Iste postlarvale Stadium, seet ovenfra. 



'.I. ."^annne seet fra venstre Side. 



Tal). XVIII. 

 Limndifi hrachyurus, iiiiii.) 



Fig. 1. Fuldv(jxen, ægba'renile Hun, seet fra venstre Side. 



2. Samme nedenfra. 



3. Fuldvoxen Han, seet fra hoire Side. 



4. Hovedet af en Hun, seet forfra. 



Fig. 3 



tbi 



same mag- 



6, 



eft. 



10 



11. 

 12. 

 13. 



14. 

 15. 

 Ifi. 



17, 



18. 

 19. 



20- 

 23. 



Fiti 



o. 



6 a. 



(). 



A leg of tlie 1st (lair; 1 — .5, endnpndite with its en- 



dites; ex, exopodite; ea;', dorsal lo))e of tlie latter; 



ep, epipodite; mx, coxal lobe. 



A eoxal lobe isolated and mori' highly magnified, 



seen from inside. 



A leg of the last (23rd') ])aiv, under 



ni tying power as tig. 3. 



Same leg, more highly magnified. 



Posterior end of body, seen fi-om thi> 



Tail, seen from bi'hind. 



Cerebral ganglion, with the nerves issuing from it. 



and the oeellus, seen from the left. c. cerebral gan- 

 glion; opt, optic nerve; «', nerves for the 1st pair of 



antenna?; a^, nerves for the nars; oc, ocellus; x, the 



front ligament of the ocellus. 



Cereljral ganglion and compound e^'cs (0), seen from 



abov<'. in, eye-muscles. The' rest of the lettering as 



ill tig. 9. 



(Jcellus, seen from the front. 



Same, from behind. 



Same, from below. 



Part of the ventral ganglion chain, seen from lii'low. 



An ovary from a very young animal. 

 An ovary from an older animal, soon after the eggs 

 from the follicles liave entered the ovarial tube, x, 

 oviduct. 



Piece of an ovary, witli ci^'g follicles in different 

 stages (if development. 

 Various egg-follicles, isolated. 



An egg taken out of the ovarial tube. Tlu' shell 

 has just begun to form. 

 22. A complete egg \\ith its capsule, seen in 3 diffe- 

 rent positions. 



Piece of one wing-like expansion of the egg-capsule, 

 highlv magnified. 



Plate XVII. 



Limnndia Jenh'cularis, iLin.) 



iDevel(ipment). 



A newly-hatched larva, seen from below, oc. ocellus; 

 a', 1st pair of antenua;'; a^, 2nd pair of antennie 

 (oarsi; Mp, mandibular legs; L, labrum; f. caudal 

 emargiuation. 



A larva after the 1st exuviation, seen from aliove. 

 -\n older larva, seen from below. 



A later stage, in wWch the earliest rucUments of the 

 compound eyes, the carapace and the legs are dis- 

 tinguishable : seen from above. 

 Older larva, seen from below. 

 -\n antenna of the 1st pair, highly magnified. 

 A somewhat later stage, seen from the left. Left 

 oar omitted. 



Last larval stage, seen from above. 

 Young one in the last post-larval stage, seen from 

 above. 

 Same, seen from the left. 



Fi'j 



1. 

 2. 



3. 

 4. 



Plate XVIII. 

 Limiietis hrachyurus, (Mtill.) 



Full-grown, ovigerous female, seen from the left. 



Same, from below. 



Full-grown male, seen from the right. 



Head of a female, seen from the front. 



