41 



Led og retter sig lige fortil. er af en meget smal. lineær 

 Form og i Enden utydeligt leddet og børstebesat; Epigna- 

 then er af samme Beskaffenhed som paa foregaaende Par. 

 men af næsten cirkelrund Form. Bag denne udgaar fra 

 Roddelens ydre .Side en smal tungeformig Flig. som ogsaa 

 ibretindes paa det følgende Par samt paa samtlige Fodder. 



3die Par Kjævefødder (Fig. 16) er stærkt forlængede, 

 fodformige og rækker fortilstrakte omtrent til Spidsen af 

 2det Par Poleres Blad. Af Stammens 5 Led er det 3die 

 storst og mindre skarpt adskilt fra det foregaaende, samt 

 temmelig stærkt krummet. Sidste Led er ikke meget kortere. 

 men stærkt afsmalnende mod Enden, der er udtrukken i 

 en sylformig Spids. Det er ligesom de foregaaende Led 

 besat med tætte Borsteknipper, som navnlig i den indre 

 Kant er stærkt udviklede. hvorimod egentlige Torner mangler. 



Til Ydersiden af Stammens 2det Led er fæstet en 

 vel udviklet Exognatb. paa hvilken kan adskilles en smalt 

 cylindrisk Basaldel og en noget sammentrvkt. mangeleddet 

 og med lange Fjærborster besat Endedel. Den hele Exo- 

 gnaths Længde er lige udstrakt omtrent '/s fl l Stammens 

 Længde. 



Endelig er til Ydersiden af Stammens Rodled fæstet 

 en oval eller elliptisk Epignath, der i hoi Grad udmærker 

 sig derved, at den har antaget Beskaffenheden af en virkelig 

 Gjelle, idet der fra dens ydre Flade har hævet sig 8 — 9 

 tydelige bladformige Tværfolder. 



Samtlige Fødder bar fæstet til Ydersiden af 2det Led 

 en vel udviklet Svømmegren (Exopodit) ligesom hos Scbi- 

 zopoderne og svarende til den saakaldte Exognatb paa 

 Munddelene. 



De to forreste Par er kortest og som bos Pasiphae 

 forsynede med Saxe; de 3 bågeste Par er derimod simple i 

 Enden. 



Iste Fodpar (Fig. 17) er knapt san langt som sidste 

 Par Kjævefødder og af forholdsvis svag Bygning. Af Led- 

 dene er det 4de størst og hengere end de 3 foregaaende 

 tilsammen. 5te Led danner med dette i Regelen en stærk 

 knæformig Boining og er knapt '/ 3 saa langt. 6te Led 

 eller Haanden er kun lidet tykkere end det foregaaende 

 Led og indtager omtrent 1 j i af Fodens Længde. Fingrene 

 er, sammenlignet med samme hos Pasiphae, meget korte, 

 neppe halvt saa lange som Palmen, temmelig tynde og i 

 Spidsen svagt krummede (se ogsaa Fig. 18). Alle Led er 

 mere eller mindre tæt børstebesatte. navnlig i den indre 

 Kant; dog er Børsterne paa selve Haanden meget korte. 



Svommegrenen er stærkt udviklet og rækker lige for- 

 tilstrakt ud over 4de Led. Dens Bygning stemmer forøv- 

 rigt fuldkommen overens med Exognathen paa sidste Par 

 Kjævefødder. 



Den norske Nordliavsexpeditoin. G. 0. Sårs: Crustaeea. 



The exognatb. attached to the outer side of the 2nd joint 

 of the stem and protending straight forward, has an ex- 

 ceedingly slender, linear form. and at the end is indis- 

 tinctly articulated, and beset with bristles; the epignath 

 exhibits a structure similar to that in the preceding pair, but 

 a well-nigh circular form. Posterior to the latter, proceed 

 from the outer side of the basal part a narrow. linguiform 

 lobule. which also occurs on the succeeding pair, and on 

 all of the legs. 



The 3rd pair oi' maxillipeds (fig. 16) are greatlv pro- 

 duced. pediform, and reach, extended anteriorly, about 

 to the point of the scale of the 2ud pair of antennæ. Of 

 the 5 joints of the stem, the 3rd is the largest, and less 

 distinctly separated from the preceding. as also a good deal 

 curved. The terminal joint is not much shorter, tapers 

 rapidly toward the extremity. which is drawn out to an 

 awl-shaped point. Like the preceding joints, it is beset 

 with dense fascicles of bristles. which, more particularly 

 on the inner margin, are strongly developed; true spines. 

 however. do not occur. 



To the outer side of the 2nd joint of the stem is 

 attached a well-developed exognatb. on which can be dis- 

 tinguished a narrow. cylindric basal portion and a somewhat 

 compressed. multiarticulate terminal part. beset with long. 

 plumose bristles. The wliole length of the exognatb. when 

 fully extended. equals about one-third of the length of the 

 stem. 



Finally, on the outer side of the basal joint of the 

 stem is attached an oval or elliptic epignath. strikiugly 

 distinguished by having assumed the cbaracter of a true 

 branchia. 8 or !• distinct transverse folds rising from its 

 outer surface. 



All oi' the legs have a well-developed natatory branch 

 (exopodite) attached to the outer side of the 2nd joint, as 

 in the Schizopods. corresponding to the so-called exognatb 

 on the oral appendages. 



The two anterior pairs are shortest, and, as in Pasiphae. 

 furnished with chelæ; the fchree posterior pairs are, on the 

 other hand. simple at the extremity. 



The Ist pair of legs (fig. 17) are scarcely as long as 

 the last pair of maxillipeds. and comparatively feeble in 

 structure. Of the joints, the 4th is the largest. and longer 

 than the tbree preceding ones tåken together. The 5th 

 joint forms along with the 4th, as a rule, a strong, geniculate 

 bend. and is hardly one-third as long as the latter. The 6tb 

 joint,- or hand, is but little tbicker than the preceding joint, 

 and measures about one-fourth of the length of the leg. 

 The fingers, as compared with tbose in Pasiphae, are ex- 

 ceedingly short, scarcely half as long as the palm. somewhat 

 slender. and at the point slightly curved (see. too, fig. 18). 

 All of the joints are more or less densely beset with bristles. 

 in particular along the inner margin; the bristles on the 

 band itself. however. are very short. 



The natatory branch is powerfully developed. and 

 reaches. anteriorly extended. beyond the 4th joint. For 

 the rest. its structure perfectly agrees with that of the 

 exognatb on the last pair cif maxillipeds. 



