81 



Af iriinddol.'iip cv (se Fig-. 21) Overlæbeii (L) 

 og KiiuUiakkenie (M) let at oliserveve, os; synes i 

 alt væseiitligt at ligne samme lios det voxne r)yr. 

 Af nogen Jlandilinlarjialpe er der intetsonilielst 

 S])or at se, skjondt den ganske sikkert liar existeret 

 paa et tidligere Stadinni. 1'nderlælipn ng Kjæverne 

 har jeg ikke knnni't noiere nndersoge. 



Af Fodderne er de til ilidtkroiiin-u Imreiido Par 

 allerede taalelig vel ndviklcde, med alle sim' Hoved- 

 dele tydelige, bvdrimud de liagre Par iiliver i lioi 

 iivaå rudimentære, forestillende tilsidst meget smaa, 

 ntydeligt indskaarne Skiver uden enliver Borste- 

 besætning (Fig. 2G). 



Forste Fodpar (Fig. '2'2) viser i Henseendr til 

 Enditerne endnu ingensondndst Forskjrd fra de nær- 

 mest folgeiide Par (Fig. 23), og den yderste eller 

 5te Endit, der lios det voxne Dyr er ganske rndi- 

 mentær, er lier ligesaa vel ndviklet som paa de føl- 

 gende Fodder. Derimod er Exopoditen kj endelig 

 mindre ><g knn forsynet med 8 Pandliorster, medens 

 den paa 2det Par (Fig. 23) liar ikke mindre end 14 

 saadanne, ilte Fodpar (Fig. 24) er endnu kun lidet 

 ndviklet og visei' intet Tegn til nogen Ægkapsel. 

 Exopoditen er paatværs oval og for.synet med en 

 Ead af ',) forholdsvis korte Randborster. Epipoditen 

 er meget liden, knndefoi'mig, og Enditerne afstum- 

 pede i Enden. Paa de folgende Par (Fig. 2;')) bliver, 

 som ovenfor nævnt, alle disse Dele endniere rudi- 

 mentære, og tilsidst \¥ig. 26) er der neppe mere 

 end ubetydelige Sjior af dem tilbage. 



Af indre Organer skinner Tarmen meget tyde- 

 ligt igjennem Integumenterne (se Tab. XI, Fig. 4) 

 og er ialmindelighed fyldt med orangefarvede ( "on- 

 tenta. Fortil ndsender den 2 korte Blindsa^'kke 

 (Tab. XIII, Fig. 21, 1), der hver klover sig i 2 (Irene, 

 livoraf igjen enhver er svagt tvelajjpet i Enden. 

 Dette er Begyndelsen til den hos det voxne Dyr 

 saa volnmimise og complicerede Lever. 



Et noget senere Stadium er fremstillet Tab. XI, 

 Fig. 5. ]jeg;emet har nix en Længde af omtrent 4 

 mm. og er endnu halvt gjennemsigtigt, mi'd et svagt 

 gronagtigt Skjær og gulrod gjennemskinnende Tarm. 

 Eygskjoldet er nn forholdsvis noget storre, men 

 endnn temmelig fladt, og Ivropjten har strakt sig 

 noget mere i Længde. Forovrigt stemmer dette 

 Stadium meget nær med det foregaaende, og 2det 

 Par Folere fungei-er fremdeles som Svommeredska- 

 ber, skjondt de er noget reducerede i Størrelse, me- 

 dens Fodderne synes mere ndviklede. 



n — <T. 0. Sai-s : Faitna Xorrerjiw. 



extremity with 3 ciliated bristles of nne([ual 

 length. 



Of the oral ])arts (see tig. 21), the labrum (L) 

 and the mandiljles (M) are easy to observe, and seem 

 in e\ery essential particular to resemblp those ])arts 

 in the full-grown animal. There is no trace what- 

 ever of a mandibulai- palp, though it must ccrtainl\' 

 have existed at an earlier stage. The ]i(istcri(]r lip 

 and the maxillæ I have not been aide to examine 

 closely. 



The pairs of legs l)elonging to the mesosome 

 are alread\- tolcralily well developed, all their prin- 

 (•i])al parts 1 icing distinct, whereas the posterior 

 pairs become extremely rudimentary, appearing at 

 last like very small, indistinctl3' indented lamcUæ, 

 cntiridy withont bristles (tig. 2()). 



As regards the endites, the hrst i)air of legs 

 (tig. 22 j presents as ^•et no difference whatever from 

 the ])airs immediatelx- following (fig. 23), and the 

 outermost or oth endite, which in the full-grown 

 animal is ([uite rudimentary, is here just as well 

 developed as in the succeeding legs. On the other 

 hand the exopodite is jiercejitilily smaller, and fur- 

 nished with only S marginal Ijristles, while that of 

 the 2nd pair (tig. 23) has no less than 14 su(di 

 bristles. The 11th pair of legs (tig. 24) is as yet 

 only slightly developed, and shows no sign of any 

 egg-capsule. The exopodite is transversely o\'al, and 

 furnished with a row of 9 comparatively short mar- 

 ginal bristles. Tlie e])ipodite is nodiform and very 

 small, and the endites are truncated at the extre- 

 mity. In the succeeding jiairs (fig. 25), all these 

 parts become, as stated above, more and more I'udi- 

 mentary, until at last (fig. 2(3) there is hardly more 

 than a slight vestige of them left. 



( )f the internal organs, the intestine shows very 

 distinctly through the integuments ise PL XII, fig. 4), 

 its contents generally being of an orange coh.mr. 

 It sends out in front 2 short cæca (Pl. XIII, fig. 

 21, 1), -wliiidi eacli divide into 2 bi'anches, each of 

 which is in its tiirn slightly bi-lobed at the extre- 

 mity. This is the commencement of the very volu- 

 minous and com|dicated liver found in the full-grown 

 animal. 



PI. XI, fig. 5 represents a rather later stage. 

 The body has now a length of about 4 mm. and is 

 still semi-trans]iarcnt, with a faint greenish tinge, 

 and the yellowish-red intestine showing through. 

 The carapa<'e is now comparatively rather larger, 

 though still somewhat Hat, and the trunk has 

 somewhat increased in length. In other respects 

 this stage agrees very (dosely with the ]n-eceding 

 one, and the 2nd pair of antennæ still officiate as 

 swimming implements, though they are somewhat 

 reducetl in size, while the legs appear to be more 

 developed. 



