44 



Hos Hunnen (Tab. VI, Fig. 3, 4) danner de ydre 

 Kjonsvedhæng en enkelt bagudrettet, po.seformig Be- 

 holder af meget smal, næstert cylindrisk Form, dog 

 gradvis noget tiltagende i Tykkel.se mod Enden. 

 I sin fiilde Udvikling rækker den næsten til Enden 

 af næstsidste Halesegment; men er ofte en Del kor- 

 tere. Sædvanligvis sees i dens indre et storre eller 

 mindre Antal af Æg af morkegron Farve, ordnede 

 i 2 eller flere Rader. Enden af Ægbeholderen er 

 noget koniskt tillobende og bestaar af 2 ved sær- 

 egne Muskler bevægelige Klapper, der begrændser 

 en tværliggende spaltformig Aabning, bvorigjennem 

 Æggene udstodes. Den ventrale Klaji er noget mere 

 fremragende end den dorsale og ender med et lidet 

 papilleformigt Fremspring (se Tab. VIII, Fig. 11). 



Hos Hannen (Tab. VI, Fig. 1 og 2) er Kjøns- 

 liængene dobbelte og meget smaa. De iidspringer 

 (se Fig. 11) hvert med en temmelig bred Basis fra 

 Siderne af de 2 Kjonsringe og retter sig skraat 

 nedad og bagud. Fortil viser de nær sit Ud.sjiring 

 en dybt indstikkende Bugt, som begrændses oventil 

 af en sammentrykt triangulær Lap, nedentil af en 

 konisk tilspidset Fortsats. Den ydre Del af Ved- 

 hænget er simpelt cylindriskt, og fra dens stumpt 

 tilrundede Ende sees undertiden en uregelmæssig 

 sagtakket Vorte at skyde frem, egentlig en Udkræng- 

 ning af vas deferens. 



Legemet er hos begge Kjøn i hoi Grad gjennem- 

 sigtigt, saa at de indre Organer, navnlig den med 

 rødgult Indhold fyldte Tarmkanal, tydeligt skinner 

 igjennem de tynde Integamenter. Farven er noget 

 vekslende efter Lokaliteterne, snart meget bleg, 

 hvidagtig, snart med et mere eller mindre tydeligt 

 rijdligt eller grønligt Anstrøg. 



Beslivivelse af Kroppens Yedliæiig. 



Øinene (Tab. VI, Fig. it; Tab. VIL Fig. 1 og 

 2, 0), der rager frem til hver Side fra den forreste 

 Del af Hovedet, er stilkede og viser idethele en 

 meget lignende Bygning som hos Nebalia, skjondt 

 deres Bevægelighed er langt mere begrændset. Af 

 Form er de næsten kolledannede, idet de gradvis 

 udvides mod Enden, der er noget skjævt tilrundet. 

 Den egentlige Øienglob, der indtager omtrent Vs af 

 Øiets Længde, indeholder en oval eller elliptisk An- 

 samling af mørkt Pigment, omgivet udåd af en klar 

 Zone, hvori de ydre lysbrydende Dele af Syns- 

 elementerne har sin Plads (se Tab. VIII, Fig. 6). 

 Nogen ydre Facettering er ligesaalidt tilstede her 

 som hos Nehalia. — Midt imelleni Øinene sees i det 

 Indre af Hovedet en dyb sort Pigmentplet, som er 

 det saakaldte Ocellus eller enkle Øie. 



In the female (Pl. VI, figs. 3, 4), the outer sexual 

 appendages form a single, bag-formed reservoir 

 directed backwards, of very narrow, almost cylind- 

 rical shape, but increasing gradually somewhat in 

 thickness towards the extremity. In its full develop- 

 ment it extends almost to the extremity of the pe- 

 nultimate segment, but is often somewhat shorter. 

 There is usually seen in its interior a larger or 

 smaller number of ova of dark green colour, arranged 

 in 2 or several series. The extremity of the mar- 

 supium runs somewhat conically out, and consists 

 of 2 flaps, moveable by means of peculiar mus- 

 cles, which define a transversal fissure-like aper- 

 ture through which the ova are expelled. The 

 ventral flap is somewhat more projected than the 

 dorsal one, and terminates in a small papilliform 

 prominence (see PL VIII, fig. 11). 



In the male (PI. VI, figs. 1 and 2), the sexual 

 appendages are double and very small. They issue, 

 (see fig. 11), each with a pretty broad base, from 

 the sides of the 2 sexual segments and are di- 

 rected obliquely downwards and backwards. Tliey 

 exhibit in front, near their origin, a deep sinus, 

 which is defined above by a compressed triangular 

 lobe, and below by a conically pointed projec- 

 tion. The outer part of the appendage is plain 

 cylindrical, and from its bluntly rounded extremity 

 an irregularly serrated nipple is sometimes seen to 

 project, really a bulging out of the vas deferens. 



The body, in both sexes, is in a high degree 

 transparent, so that the internal organs, especially 

 the intestinal canal, filled with red-yellow contents, 

 shine distinctly through the thin integuments. The 

 colour is somewhat variable, according to the locality, 

 sometimes very pale, whitish, sometimes with a more 

 or less distinct reddish or greenish tinge. 



Description of the appendages of the body. 



The eyes (PI. VI, fig. 9; PI. VII, rigs. 1 and 

 2, 0), which project forwards on either side of the 

 foremost part of the head, are distinctly peduncul- 

 ated, and altogether exhibit a very similar structure 

 to those of Nehalia, although their mobility is far 

 more limited. They are almost claviform \\\ shape, 

 as they become gradually dilated towards the extre- 

 mity, which is somewhat obliquely rounded. The 

 real ocular globe, which occupies about ^'a of the 

 eye, contains an oval or elliptical collection of dark 

 pigment, surrounded outwards by a clear zone in 

 which the oiiter refracting portions of the visual 

 elements have their position (see PI. VIII, fig. 6). 

 Any external facetting is just as little present here 

 as in Nebalia. Midway between the e^-es there is 

 seen, in the interior of the head, a deep black 

 pigment-patch, which is the so-called ocellus or 

 simple eye. 



