75 



var tilstede som et Riidiment, er her meget stærkt 

 udviklet, fuldkommen saa lang som den 4de, og nd- 

 præget kloformig. Den er i Yderkanten besat med 

 line Borster og har Inderkanten fint og regelmæssigt 

 sagtakket. Coxallappen er noiagtig af samme Ud- 

 seende som paa Iste Par. Derimod er de 2 ydre 

 Vedhæng, og na^^llig Exopoditen (ex) forholdsvis 

 større. 



De følgende 7 Par gaar successivt over til at 

 antage det Udseende, som 10de Fodpar viser. Dette 

 sidste (Fig. 16) er idethele kortere og mere sammen- 

 trængt, nden nogen tydelig Segmentering eller knæ- 

 formig Boining af Stammen. Coxallappen er for- 

 holdsvis noget mindre end paa de 2 forreste Par og 

 mere lige indadrettet. Enditerne er kortere og bre- 

 dere, næsten pladeformige, og den yderste bredt 

 lancetformig samt tæt borstebesat i den ydi-e Kant. 

 De ydre Vedhæng er begge af anselig Størrelse, og 

 navnlig Exopoditen (ex) betydelig større end paa de 

 foiTeste Par; dens Form er ogsaa noget forskjellig, 

 idet den er mere oval, med den nedre Flig bredt 

 afrundet. 



Ute Fodpar (Fig. 17) viser et fra de øvrige 

 Fødder meget afvigende Udseende, idet de 2 ydre 

 Vedhæng her er omdannede paa en eiendommelig 

 Maade, saa at de tilsammen danner en æskeformig 

 Kapsel, hvoi'i Æggene midlertidigt optages, for at 

 forsynes med sin Skal. Laaget af Kapselen, der 

 vender fortil og er af regelmæssig circulær Form, 

 dannes af Epipoditen, medens Bunden af Kapselen 

 udgjores af Exopoditen. Ogsaa denne er af tilrun- 

 det Form, men noget bredere end Epipoditen, og 

 ndspringer med en bred Basis fra Stammen. Begge 

 slutter temmelig nøie sammen, dog saaledes, at der 

 paa den ydre Side er en rendeformig Fordybning, 

 der dannes af de ombøiede Kanter af Exopoditen. 

 Selve Stammen er kort og bred, pladeformig, og den 

 yder.ste Endit ikke tydeligt begrændset, dannende 

 en umiddelbar Fortsættelse af Stammen i Form af 

 en triangular Lap. 



12te Fodpar (Fig. 18) viser igjen et mere nor- 

 malt Udseende og stemmer idethele i sin Bygning 

 nøie overens med 10de Par, naar undtages, at det 

 er mindre og har den yderste Endit forholdsvis kor- 

 tere og bredere. Det samme er ogsaa Tilfældet med 

 Exopoditen, hvis nedre Del er mindre fremsprin- 

 gende. 



De følgende Fodpar aftager successivt i Stør- 

 relse og bliver tilsidst ganske rudimentære, skjondt 

 alle de Dele, der findes paa de foregaaende Par, 

 lader sig jmavise. 



Fig. 19 fremstiller en Fod af et af de bagerste 

 Par ved samme Forstørrelse som de foregaaende 

 Par. Det vil sees, at Enditerne er betydeligt redu- 



The outermost, or 5th endite, which in the first 

 pair was only found as a rudiment, is here very 

 strongly developed, is fully as long as the 4th, and 

 of a pronounced claw-like shape. The outer edge 

 is clothed with fine bristles, and the inner edge 

 finely and regularly serrated. The coxal lobe is of 

 exactly the same appearance as in the first pair. 

 The two outer appendages, on the other hand, 

 and especially the exopodite (ex), are comparatively 

 larger. 



Through the 7 succeeding pairs there is a 

 gradual transition to the appearance of the 10th 

 pair of legs. This pair (fig. 16) is on the whole 

 shorter and more compact, without any distinct seg- 

 mentation or geniculation of the stem. The coxal 

 lobe is relatively rather .smaller than that in the 

 foremost 2 pairs, and its direction is more directly 

 inwards. The endites are shorter and broader, al- 

 most lamellar, the outermost being broadly lanceolate 

 in form, and denselj^ setous on the distal edge. The 

 outer appendages are both of considerable size, the 

 exopodite (ex) especially being much larger than in 

 the foremost pairs. Its shape is also somewhat dif- 

 ferent, being more oval, and the lower lobe more 

 broadly rounded. 



The 11th pair of legs (fig. 17) exhibits a very 

 dilferent appearance from the others, the 2 outer 

 appendages being transformed in a peculiar manner, 

 so as together to form a liox-like capsule in which 

 the ova are temporarily received in order to be fur- 

 nished with their shell. The lid of the capsi^le, 

 which turns to the front, and is of a regularly cir- 

 cular shape, is formed by the epipodite, while the 

 bottom of the cap.sule consists of the exopodite. 

 This, too, is of a rounded form, but rather broader 

 than the epipodite, and issues with a broad base 

 from the stem. The two parts fit together tolerably 

 exactly, yet in such a manner that on the outer 

 side there is a channel-like hollow formed by the 

 decurved edges of the exopodite. The stem itself is 

 short, broad and lamellar: the outermost endite is 

 not clearly defined, and forms a direct continuation 

 of the stem in the shape of a triangular lobe. 



The 12th pair of legs (fig. 18) exhibits a more 

 normal appearance, and, on the whole, agrees verj^ 

 nearly in its structure with the 10th pair, excepting 

 that it is smaller, and that the outermost endite is 

 relatively shorter and broader. This is also the 

 case with the exopodite, the lower part of which is 

 less projecting. 



The succeeding pairs of legs decrease succes- 

 sively in size, and at last become quite rudimen- 

 tary, although it is possible to distinguish all the 

 parts that are found in the preceding pairs. 



Fig. 19 represents a leg of one of the hindmost 

 pairs magnified with the same power as the pre- 



ceding pairs. 



It will be seen that the endites are 





\c- 



