137 



Fia. 21. 



2'J. 

 23. 

 2-1. 

 25. 

 26. 

 97_ 



28. 



Fi^ 



Fi" 



6. 

 6. 



9. 



10. 

 11. 



12. 

 13. 



Fis 



Furendcn af on Larve, seet nedenfra. de sammen- 

 satte Øinc; oe det enkle Øie; a' Iste Par Følere; 

 «» 2det Par Følere; L Overlreben; M Kindbakkerne ; 

 / Lever.=!ekke. 



]<;n Fod af Is^te Par af samme Larvi.' 

 ICn Fod af 2det Par. 

 Vai Fod af Ute Par. 

 En af de Ijagenfor liggende Fodder. 

 1mi af de allerbagerste Fodder. 



Dtai bagre Del af Legemet af samme Larve, seet 

 ovenfra. 



Bagenden, med Basis af Haletraadene, af en ældre 

 Larve, ovenfra seet. 



Tab. XIV. 



Limnadia lenticularis, (Lin.) 



Fuldvoxent, a-gbærende Exemi^lar, seet fra lioire Side. 

 Samme ovenfra. 

 Samme nedenfra. 



En kun lidt over 1 iiiin. lang Unge, seet fra ven- 

 stre Side. 



En anden noget storre Unge, fra sannne Side. 

 Et Exemplar, paa hvilket den første Væxtstribe har 

 dannet sig, seet fra venstre Side. 



Tab. XV. 



Limnadia lenticidaris, (Lin.) 



Dyret liggende i sin naturlige Situs i lioire A'alvel. 

 Venstre Valvel borttaget. 



Det forreste Afsnit af Legemet seet fra venstre Side, 

 sticrkere forstorret. Aarerne er borttagne, r Rost- 

 rum ; af Fasthef-tningsorgan ; de sammensatte Øine ; 

 oe det enkle Øie; a' Iste Par Følere; L Overlæben; 

 M Kindbakkerne; to' Iste Par Kjæver; m' 2det Par 

 Kjæver; i Tarmen; I Leveren; ms Insertionsareaen 

 for Skallens Lukkemuskel; c Forenden af Hjertet. 



Saiimie Del, med Basis af Aarerne, seet ovenfra. 

 Bogstaverne som paa foregaaende Figur. 

 Samme Del, uden Aarerne, seet nedenfra. Bogsta- 

 verne som paa de 2 foregaaende Figurer. 

 En Foler af Iste Par. 



En af de paa samme fiestede Lugtepapiller, stærkt 

 forstørret. 



Overlæben seet fra venstre Side. 

 En Kindbakke, seet forfra. 



En Del af den ventrale Flade, umiddelbart bag Mund- 

 aabningen. M Stedet, hvor Kindbakkernes Tygge- 

 dele har ligget; w' Iste Par Kjæver; ni^ 2det Par 

 Kjæver; oes Spiserøret. 

 Ell Kjæve af Iste Par. 



To af de paa samme fæstede i:iigformige Børster, 

 stærkt forstørret. 

 En Kjæve af 2det Par. 

 Samme Kjæve stærkere forstorret. 



Tab. XVI. 

 Limnadia lenticidaris, (Lin.j 



V.w Aare (Foler af 2det Par). 



Tre af de til Forsiden af den ydre Gren fiestede 



Pigge, stærkere forstorret. 



0. 0. Sårs Fauna Norveoix. 



Fig. 21. 



22. 

 23. 



24. 

 26. 

 26. 



27. 



28. 



Fig. 



1. 

 2. 

 3. 

 4. 



5. 

 6. 



Fig. 



10. 



11. 



12. 

 13. 



Anterior end of a larva, seen from below. 0, com- 

 pound eyes; oe, ocellus; rt', 1st pair of anteunæ; «'■', 

 2nd pair of antennæ; L, labrum; M, mandibles; I, 

 biliary cæca. 



A leg of the 1st i)air of the sama larva. 

 A leg of the 2nd pair. 

 A leg of the Uth pair. 

 One of the legs farther Iiack. 

 One of the Mndmost legs. 

 Posterior part of the same larva, seen from above. 



Posterior end of an (jlder larva, with the base of the 

 caudal filaments, seen from above. 



Plate XIV. 

 Limnadia lenticularis, (Lui.) 



Full-grown, ovigerous specimen, seen from the right. 



Same, from above. 



Same, from below. 



A young one, only a little over 1 mm. in length, 



seen from the left. 



A somewhat larger young one, from the left. 



A specimen in which the lirst line of growth has 



been formed, seen from the left. 



Fig. 



Plate XV. 



Limnadia lenticularis, (Lin.i 



The animal, lying in its natural 



valve: left valve removed. 



The anterior part of the body 



more highly magnified. The 



r, rostrum; af, affixing organ; 



oc, ocellus; a', 1st pair of antennæ 



mandibles; m', 1st pair of maxillæ; 



position in the right 



seen from the left, 



oars are removed. 



0, compound ej-es; 



i, labrum; M. 



m'', 2nd pair of 



■ms, area of insertion 

 ; c, anterior end of 



maxillæ; i, intestine; I, liver 

 of the shell's adductor muse 

 the heart. 



Same jjart, with the l)ase of the oars, seen from 

 above. Lettering as in tig. 2. 



Same part, "without the oars, seen from below. Let- 

 tering as in figs. 2 and 3. 

 An antenna of the 1st pair. 



One of the olfactory papilhe (ju the same, highly 

 magnitied. 



Labrum seen from the left. 

 A mandible, seen from the front. 

 Part of the ventral surface, immediately behind the 

 oral ai^erture. M, place where the masticatory part 

 of the mandibles has been; m.', 1st pair of maxillre; 

 m'', 2nd pair of maxillæ; oes, (esophagus. 

 A maxilla of the 1st pair. 



Tvvo of the spiniform bristles on the same, liighly 

 magnified. 



A maxilla of the 2nd pair. 

 Same maxilla more higlilv mannified. 



Plate XVI. 



Limnadia lenticularis, (Lin 



An oar .antenna of 2nd pair). 



Three of the spines affixed to the front of the outer 



ramus, more highly magnified. 



