74 



Segmenter. Paa Midtkroppen bærer derimod hvert 

 Segment knn et enkelt Par Fodder, og de er lier 

 ogsaa langt kraftigere lulviklede (see Tab. XI, Fig 2), 

 visende idethele, naai' undtages Iste Par, Cliarac- 

 teren af ægte Griberedskaber, vel skikkede til at 

 gribe og fastholde den Næring, hvoraf Dyret lever. 

 Forovrigt er disse forreste Par, ligesaavel som de 

 Ijagerste, for.synede med de 2 characteri.stiske ydre 

 Vedliæng, Exopodit og Epii)odit, der begge synes 

 at staa i Eespirationens Tjeneste. Foddernes Antal 

 er ialt ikke mindre end (13 Par. 



l.ste Fodpar (Tab. XII, Fig. 1, p\ Fig. 14) skil- 

 ler sig kjendeligt i sitUdseende fra de følgende Par, 

 og er ogsaa ialmindelighed mere ndadrettede, saa at 

 de delvis overrager Rygskjoldet.s Sidekanter. De 

 bestaar imidlertid af de samme Hoveddele som de 

 øvrige Fodder. Selve Stammen viser en mere eller 

 mindre tydelig Segmentering. Navnlig er der paa 

 Midten af samme en meget distinct Ledfoining, der 

 deler Stammen i en indre og en ydi-e Del, dannende 

 med hinanden en noget knæformig Boining. Den 

 indre Del af Stammen har, som paa de ovrige Fod- 

 der, ved Basis en vel iidviklet og meget skarpt 

 sondret ('oxallap, der er rettet lige indad og liesat 

 ])aa sin stumpt afriindede Ende med talrige korte 

 Pigge og fine, indadkrummede Boi'ster. Af de saa- 

 kaldte Enditer er kixn den inderste fæstet til denne 

 Del af Stammen, medens de 3 ovrige udgaar fra 

 dens ydre Afsnit. De liar alle Formen af foi'liolds- 

 vis smale, næsten traadformige Fortsatser, grovt 

 sagtakkede i Kanterne og delvis visende en utyde- 

 lig Leddeling. Den 4de eller yderste Endit er dob- 

 belt saa lang som den 1 ste og omtrent af Stammens 

 lialve Længde. Ved Basis af denne Endit er der et 

 ubetydeligt laneetformigt Fremsi)ring, der repræsen- 

 terer Pudimentet af den paa de ovrige Fodpar me- 

 get kraftigt ndviklede ote Endit. De 2 ydre Ved- 

 hæng er begge forholdsvis smaa. E])ipoditen (ep) 

 har Formen af en afrundet oval Lamelle, der ved 

 en kort Stilk er fæstet til Stammens Yderside om- 

 trent ved dennes knæformige Boining. Exo]ioditen 

 (ex), der udspringer i kort Afstand fra Epipoditen 

 længere udåd, er ligeledes pladeformig, men betyde- 

 lig mindre og af uregelmæssig trekantet Form, idet 

 den er udtrukket i 2 Flige, hvoraf den yderste er 

 mest fremspringende og rundt om kantet med fine 

 Børster. 



2det Fodpar (Fig. 15) er ad.skilligt stærkere byg- 

 get end Iste, og skiller sig desuden væsentlig ved 

 Forholdet af Enditerne. Disse er nemlig kortere og 

 •stærkere, næsten kloformige, og mangler ethvert 

 Spor af Leddeling, skjøndt de viser i begge Kanter 

 et Antal af smaa, med fine Pigge besatte Afsatser. 

 Den yderste eller .5te Endit, der paa Iste Par kun 



than there are segments. On the mesosonie, on 

 the other hand, each segment carries only a 

 .single pair of legs, which are also nnich more 

 powerfully developed (see PL XI, fig. 2), exhibiting, 

 on the whole, with the exception of the first 

 pair, the character of true grasping organs, well 

 fitted for seizing and retaining the food on which 

 the animal lives. The anterior, as well as the pos- 

 terior pairs, are furnished with the two charac- 

 teristic external appendages, exopodite and epipo- 

 dite, which both a])pear to serve as organs of res])i- 

 ration. The number of legs in all is no less than 

 63 pairs. 



The first pair of legs (PI. XII, fig. 1, p \ fig. 14) 

 is conspicuously distinguished in appearance from 

 the succeeding pairs, and is also generally directed 

 more outwards, so as jjartially to project over the 

 lateral edges of the carapace. These legs consist, 

 however, of the same principal pax'ts as the other 

 legs. The stem itself shows a more or less distinct 

 segmentation. In the middle of it, notably, there 

 is a very distinct articiTlation, dividing it into a 

 proximal and a distal part, which form with each 

 other a somewhat geniculated flexure. As in the 

 other legs, there is, at the base of the proximal 

 poi'tion of the stem, a well-develof)ed and very 

 sharply defined coxal lolje, directed straight inwards, 

 and furnished at its bluntly rounded extremity with 

 numerous short spines, and fine, incurved l)ristles. 

 Of the so-called endites, only the innermost is 

 attached to this part of the stem, while the other 

 3 issue from its distal section. Tliey all liave the 

 form of comparatively narrow, almost filiform ju'o- 

 cesses, coarsely serrated at the edges, and partly 

 showing an indistinct segmentation. The fourth, or 

 outermost endite is twice as long as the first, and 

 about half the length of the stem. At its base, 

 there is a lanceolate projection, which represents 

 the rudiment of the powerfully developed 5th endite 

 on the other legs. The two outer appendages are 

 both comparatively .small. The epipodite (ep) is in 

 the shape of a rounded oval lamella, attached by a 

 short peduncle to the outer side of the stem at 

 about the geniculated bend. The exopodite (ex) 

 which issues at a short distance from the epipodite, 

 farther out, is also lamellar, but considerably 

 smaller, and of an irregularly triangular .shape, 

 being drawn out into two lobes, of which the outer 

 is the more prominent, and is edged all round 

 with fine bristles. 



The 2nd pair of legs (fig. 15) is far more strongly 

 built than the first, and is, in other respects, prin- 

 cipally distinguished by the relations of the endites 

 to one another. These are shorter and stronger, 

 almost claw-like, and devoid of every trace of seg- 

 mentation, although they exhibit at both edges a 

 number of .small serrations clntlied with fine s])inules. 



