137 



Fie. 21. 



22. 

 23. 



2.1. 

 25. 

 2G. 

 27. 



2S. 



Fi- 1. 



' 2. 



3. 



4. 



Fig. 1. 



10. 

 11. 



12. 

 13. 



Fi-j 



Forenden ;d' en Liirve, sect nedenfra. ile sammen- 

 satte Oine; oe det enkle Oie: o' Iste Par Folere: 

 «" 2det Par Folere; L OverLebeii; M Kindluikkerne; 

 I Leversfekke. 



En Fod af Iste Par af ^-alnllle I.arve 

 Kn Fod af 2det Par. 

 Fn Fdd af Ilte Par. 

 Fn af cle liagenfor liggende Fodder. 

 I'.u af de allerbagerste Fodder. 



l)en liagre Del af Legemet af samme Larve, seet 

 ovenfra. 



Uagenilen, med Basis af llaletraadene, af en alilre 

 Larve, ovenfra seet. 



TalK XIV. 

 Lininadia Jenticularis. Lin., 



Fuldviixent, ;egl.i;erende Exemplar, seet fra lioire Side. 

 ^^amme ovenfra. 

 Samme ni'denfra. 



En kun lidt over 1 mm. lang Fnge, seet fra ven- 

 stre Side. 



En anden noget storre 1'nge, fra samme Side. 

 Et Exemplar, paa hvilket deti forste V;extstrilie har 

 dannet sig, seet fra venstre Siile. 



Tab. XA'. 



Limnaclia lenticuhiris, (Lin.'i 



Dyret liggende i sin naturlige Situs i huire ^'alvel. 

 Venstre Valvel borttaget. 



Det forreste Afsnit af Legemet seet fra venstre Side, 

 sta-rkere forstørret. Aarerne er borttagne, r Rost- 

 rum ; af Fastheftningsorgan ; O <le sammensatte Oine ; 

 oe det enkle Oie; «' Iste Par Folere; L Overheben; 

 M Ivindbakkerne ; m' Iste Par Kjæver; rø' 2det Par 

 Kj;ever; i Tarmen; I Leveren; ms Insertionsareaen 

 for Skallens Lukkemuskel; c Forenden af Hjertet. 



Sanmie Del, med Basis af Aarerne, seet ovenfra. 



Bdgstaverne som paa foregaaende Figur. 



Sanmie Del, uden Aarerne, seet nedenft-a. Bogsta- 



verne som paa ile 2 foregaaende Figurer. 



En Foler af Iste Par. 



En af de paa sanmie fæstede Lugtepapiller, sta-'rkt 



forstørret. 



Overheben seet fra venstre Side. 



En Kindbakke, seet forfra. 



En Del af den ventrale Flade, umiddelbart liag Mund- 



aabningen. M Stedet, hvor ICiudlsakkerues Tygge- 



dele har ligget; m' Iste Par Kja/ver; m^ 2det Par 



KJæver; oes Spiserøret. 



En Kjieve af Iste Par. 



Td af de paa sannne f;esteile pigformige Horster, 



sta-rkt forstørret. 



En Kja-ve af 2det Par. 



Sanmu- Kjieve sta'rkere forstørret. 



Tab. XVI. 

 Limnadia lenticular is. 



:Lin. 



En Aare Foler af 2det Par . 



Tre af de til Forsiden af den ydri. 



Pigge, stierkere forstørret. 



G. 0. Sårs Fauna Norvegiæ. 



Gren fiestede 



Fig. 21. Anterior end of a larva, seen from beUnv. 0, eom- 

 pound eves; oe. ocellus; n', 1st pair of antenme; a'. 

 2nil pair of antennje; L. labruni; M. mandililes; /. 

 biliary e;eea. 



.^leg (,f the l^t j.air of the sama larva. 

 A leg of tlie 2nd pair. 

 A leg of the lltli pair. 

 One of the legs farther back. 

 One of the hindmost legs. 

 Posterior part of the same larva, seen from above. 



2S. 



Fig. 1. 



' 2. 



^ 3. 



4. 



6. 



Fiir. 1. 



= 3. 



4. 



5 b. 

 6. 



» 7. 



■■. 8. 



9. 



10. 



11. 



12. 

 13. 



Fig. 



Posterior end of an older larva, with tlie base of the 

 caudal tilaments, seen from abo\e. 



Plate XIV. 

 Limnadia leiificidaris, Lin. 



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



Same, from aliove. 



Same, from below. 



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



seen from the left. 



A somewhat largei- young <:ine, from the left. 



A specimen in which the first line of growth luis 



been formed, seen fi-om the left. 



Plate XV. 



Limnadia ienficidaris, Lin.' 



The animal, lying in its natural position in the right 



valve ; left valve removed. 



The anterior pai't of the body, seen from the left, 



more highly magnitied. The oars are removed. 



r, rostrum; af, aftixing organ; 0, comj>ound eyes; 



oc, ocellus; a\ 1st pair of antennæ; i, labrum; M. 



mantlibles; m', 1st pair of maxiihe; m^, 2nd pair of 



maxillæ; i, intestine; I, liver; ms, area of insertion 



of the shell's adductor muscle; c, anterior end of 



the heart. 



Same part, with the liase of the oars, seen from 



aliove. Lettering as in fig. 2. 



Same part, without the oars, seen from below. Jjct- 



tering as in tigs. :.' and 3. 



An antenna of the 1st pair. 



(_)ne of the olfactory papilhe on the same, highlv 



magnitied. 



Labrum seen from the left. 



A mau(Ul)le, seen from the front. 



Part of the venti-al surface, immediately Ijehiml the 



oral aperture. M, place where the masticatory j)art 



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



m^, 2nd piair of maxiihe; oes, u-sophagus. 



A maxilla of the 1st pair. 



TVo of tlie spiniform bristles on the same, liighly 



magnitied. 



A maxilla of the 2nd pair. 



Sami- maxilla more liighlv magnitied. 



Plate XVI. 

 Limnadia lent icidar in. 



;Lin. 



.Vn oar antenna of 2nd pair . 



Three of the spines affixed to the front of the outer 



raniu>, more highlv magnified. 



