- 12. 
139 
. 5. Hovedet af en Han i samme Stilling. 
6. Skallen af en Hun, med Valvlerne tet lukkede, seet 
fra venstre Side. 
7. Samme ovenfra. 
Tab. XIX. 
Limnetis brachyurus, (Mill.) 
. 1. Legemet af en Hun liggende i sin naturlige Situs i 
hgire Valvel; venstre Valvel borttaget. 
ovs en af de kageformige ASgmasser. 
2. En Foler af 1ste Par. 
. En af de paa samme festede Lugtepapiller, sterkt 
forstorret. 
3. En Foler af 2det Par (Aare). 
4. Mundregionen seet nedenfra; Overleeben borttaget. 
M Kindbakkerne; m! 1ste Par Kjeever; m? 2det Par 
Kjeever; oes Spiseroret. 
5. En Kjeve af Iste Par. 
. En af de paa Spidsen af samme feestede Pigge, steerkt 
forstorret. ; 
6. En Kjeeve af 2det Par. 
7. Haledelen seet fra venstre Side. 
8 
9 
h Hijertet; 
Samme nedenfra. 
Den bagre Del af Legemet seet ovenfra, fl de om- 
formede dorsale Lappe af Exopoditerne paa 9de og 
10de Fodpar; 7 de bladformige dorsalePlader; % Hale- 
fligene. 
Hjertet seet ovenfra. 
11. Det forreste Afsnit af Legemet af en Hun, seet fra 
venstre Side (Aarerne udeladte). O de sammensatte 
Mine; oc det enkle Mie; p dettes forreste Ligament; 
ol Sandsegruber; « Fastheftningsorgan(?); a! 1ste Par 
Folere; L Overleeben; M Kindbakkerne; m' iste Par 
Kjeever; m? 2det Par Kjeever; ms Insertionsarea for 
Skallens Lukkemuskel; J Tarmen; lv Leveren. 
En Sandsegrube seet ovenfra. 
Hjernegangliet med de fra samme udgaaende Nerver, 
tilligemed de sammensatte Gine (0) og det enkle Mie 
(oc), seet nedenfra; opt Synsnerven; a‘ Nerver for 
lste Par Folere; a* Nerver for Aarerne. 
Samme Del (uden de sammensatte @ine), seet fra 
venstre Side. Bogstaverne som paa foregaaende 
Figur. 
Det enkle @ie seet forfra. 
Skalkjeertelen med Muskelareaen. 
13. 
14. 
15. 
16. 
Tab. XX. 
Limnetis brachyurus, (Miull.) 
En Fod af 3die Par hos Hunnen. 1—5 Endopoditen 
med sine Enditer; ma Coxallappen; ex Exopoditens 
ventrale Lap; ex dens dorsale Lap; ep Epipoditen. 
la. En af de til nestsidste Endit feestede Torne, steerkt 
forstorret. 
1b. Coxallappen isoleret, og seet fra den indre Side. 
2. En Fod af 8de Par. 
8. En Fod af 9de Par. 
3a. Enden af Exopoditens dorsale Lap, sterkt foratorret. 
4. En Fod af lite Par. 
5. En Fod af 12te (sidste) Par. 
6. Legemet af en Han liggende i sin naturlige Situs i 
venstre Valyel (hgire Valvel borttaget). 
7. En Fod af 1ste Par hos Hannen. 
Fig. 
. 6. Head of a male, in the same position. 
with the valves closely shut, seen 
> 
Shell of a female, 
from the left. 
7. Same, from above. 
Plate XIX. 
Limnetis brachyurus, (Mull.) 
1. Body of a female, lying in its natural position in 
the right shell; left valve removed. h, heart; ovs, 
one of the cake-like egg-masses. 
2. An antenna of the 1st pair. 
2a. One of the olfactory papille on the same, highly 
magnified. 
3. An antenna of the 2nd pair (oars). 
4. Oral region, seen from below: labrum removed. M, 
mandibles; m', 1st pair of maxille; m*, 2nd pair of 
maxille; oes, cesophagus. 
5. <A maxilla of the 1st pair. 
5b. One of the spines at the end of the same, highly 
magnified. 
» 6 A maxilla of the 2nd pair. 
» % Caudal part, seen from the left. 
>» §. The same, from below. 
« 9. Posterior part of the body, seen from above. jl, the 
transformed dorsal lobes of the exopodites in the 
9th and 10th pairs of legs; J, the leaf-like dorsal 
lamellee; u, caudal lobes. 
>» 10. Heart, seen from above. 
>» 11. Anterior part of the body of a female, seen from the 
left. (Oars omitted). O, compound eyes; oc, ocellus; 
p, its front ligament; ol, sensory pits; @, affixing 
organ(?); a@', Ist pair of antenne; JZ, labrum; M, 
mandibles; m1, 1st pair of maxille; m*, 2nd pair of 
maxille; ms, area of insertion of the adductor muscle 
of the shell; J, intestine; lv, liver. 
» 12. A sensory pit, seen from above. 
» 18. Cerebral ganglion with the nerves issuing from it, 
and the compound eyes (Q) and ocellus (0c), seen 
from below. opt, optic nerve; a', nerves for the Ist 
pair of antenne; a*, nerves for the oars. 
» 14, Same part (without the compound eyes), seen from 
the left. Lettering as in fig, 13. 
» 15. Ocellus, seen from the front. 
>» 16. Shell-gland with muscular area. 
Plate XX. 
Limnetis brachyurus, (Mill.) 
Fig. 1. <A leg of the 8rd pair in the female. 1—5, endopo- 
wwewyevyvw ve 
dite, with its endites; ma, coxal lobe; ex, ventral 
lobe of exopodite; ex’, its dorsal lobe; ep, epipodite. 
1a. One of the spines on the penultimate endite, highly 
magnified. 
1b. Coxal lobe isolated, and seen from:the inside. 
2. A leg of the 8th pair. 
8. A leg of the 9th pair, 
3a. End of dorsal lobe of exopodite, highly magnified. 
4. A leg of the 11th pair. 
5. <A leg of the 12th (ast) pair. 
6. Body of a male lying in its natural position in the 
left valve (right valve removed). 
7. A leg of the 1st pair in the male. 
