Lappe. Fra dets forreste Del udgaar til liver Side 

 og iioget opad en kort og tyk Nervestamme, som er 

 Synsnerven. Efterat være traadt hen mod den 

 nedre Flade af Øiet, oploser den sig i talrige diver- 

 gerende G-rene (se Fig. 7), hvoraf liver enkelt for- 

 binder sig med et tilsvarende Synselement. Fra 

 Midten afHjernegangliets forreste Ende passerer en 

 temmelig stærk Nervestamme lige fortil og omgiver 

 med sin gangliøst opsvnlmede Ende det enlde Øie 

 bagtil (se Fig. 5). Hvor Nerverne for Følerne uA- 

 spriuger, har det ikke været mig mnligt at se, men 

 der er Rimelighed for, at deres Udspring forholder 

 sig som hos Branehipodiderne. Bagtil ndgåar fra 

 Hjernegangliet 2 lange Commissurer, der omgiver 

 Spiserøret og nedentil forbinder .sig med det Iste 

 (ianglion i Buggangliekjæden. Denne sidste (se Fig. 

 9, 10, 11) bestaar af en stor Mængde Ganglier sva- 

 rende til det store Antal Fodder, og er idethele be. 

 tydelig stærkere iidviklet end hos Branchipodiderne, 

 ligesom den ogsaa viser et temmelig forskjelligt Ud- 

 seende, noget nærmende sig til det hos Phylloeari- 

 derne. Som hos disse, ligger Ganglierne (se Fig. 9) 

 meget tæt sammen, om de end er tydeligt skilte 

 baade ved Længde- og Tværcommissiirer. Af de 

 sidste tindes, som hos andre Phyllopoder, 2 for hvert 

 Par Ganglier, og mellem dem er der en meget liden, 

 tvært oval Aabiiing, medens der mellem Længde- 

 commissurerne er et større, paa langs ovalt Mellem- 

 rum. Fra hvert Ganglion ndgaar til Siden 2 .stærke 

 Nervestammer, hvoraf den forreste strax deler sig i 

 2 Grene; men angaaende disse Nervestammers videre 

 Forløb har jeg ikke kunnet skafte mig fuld Klarhed. 

 Bagtil bliver Gangliekjæden (se Fig. lU, 11) gradvis 

 smalere og de enkelte Ganglier tættere sammen- 

 trængte, saaat Commissurerne mellem dem vanske- 

 ligt adskilles. Den ender i en stump Spids paa det 

 Sted, hvor de sidste Par rudimentære Fodder lindes. 

 Fra denne bagerste Del af Buggangliekjæden udgaar 

 Nerverne for Halen ; men heller ikke om disses For- 

 lob har jeg kunnet skafte mig et klart Begreb. 



Ovarierne (Tal). XIII, Fig. 1, 2, ov) repræsen- 

 teres af 2 temmelig voluminøse og stæi'kt lap])ede 

 Organer, der strækker sig langs Siderne af Tarmen 

 igjennem Størsteparten af den fodbærende Del af 

 Kroppen. De munder hvert med en kort Ægleder 

 ved Basis af Ilte Fodpar, og indeholder et indre 

 Hulrum, der staar i direkte Forbindelse med Æg- 

 lederen Undersøges et Stykke af de udpræparerede 

 Ovarier under Mikroskopet, vil man ftnde, at ethvert 

 sig udviklende Æg er indesluttet i en Follikel, der 

 rager frem fra Ovariets Overftade i Form af en af- 

 rundet, mere eller mindre fremspringende Blære. 

 Man finder paa samme Sty-kke Ovarium Æg i alle 

 Udviklingsstadier, fra overordentlig smaa, kun ved 



found in the latter. From the anterior part there 

 issues on eaeli side, going a little upwards, a short, 

 thirk nerve-stem, which is the optic nerve. After 

 advancing towards the lower surface of the eye, it 

 is resolved into numerous divergent branches (see 

 fig. 7), each one of which unites with a correspond- 

 ing visual element. From the anterior end of the 

 cerebral ganglion, a tolerably strong nerve-stem 

 passes forwards and surrounds posteriorly, with its 

 ganglionic swollen end, the ocellus (see fig. 5). It 

 has not been possible for me to see where the 

 nerves for the antennæ originate, but it is probable 

 that their origin is the same as in the Branchipo- 

 didæ. From the cerebral ganglion. ])osteriorlv, run 

 two long commissures, which encircle the (esophagus, 

 and unite below with the first ganglion in the ven- 

 tral ganglion chain. The latter (see figs. 9, 10, 11) 

 consists of a considerable number of ganglia corres- 

 ponding to the large number of legs, and is in the 

 whole, much nnu'e highly developed than in the 

 Branchipodidæ, exhibiting too, a rather different ap- 

 pearance, somewhat approaching that of tlie Phvllo- 

 caridæ. As in that group, the ganglia (see fig. 9) 

 lie very close together, although distinctly separated 

 both by longitudinal and transverse commissures. 

 Of the latter there are, as in the other Phyllopoda, 

 two to each pair of ganglia, and between tliem 

 a very small, transversely oval opening, while be- 

 tween the longitudinal commissures, there is a larger, 

 longitudinally oval space. From each ganglion there 

 issue laterally 2 strong nerve-stems, the anterior of 

 which immediately divides into 2 rami; but concer- 

 ning the farther course of these nerve-stems, I have 

 been unable to ascertain anything clearly. Poste- 

 riorljs the ganglionic chain (see figs. 10, 11) becomes 

 gradually narrower, and the several ganglia more 

 crowded, so that the commissures between them are 

 difficult to distinguish. It ends in a blunt point at 

 the place where the last pair of rudimentary legs are 

 found. From this posterior part of the ventral 

 ganglion chain issue tlie nerves for the tail, but in 

 their case also, I have been unable to obtain any 

 clear idea as to the course they take. 



The ovaries (PI. XIII, figs. 1. 2, ov) are repre- 

 sented by 2 rather voluminous and much lobed or- 

 gans, extending along the sides of the intestine 

 throughout the greater part of the Ijody. They each 

 open by a short oviduct at the base of the 11th 

 pair of legs, and contain an inner cavity, which is 

 in direct communication with the oviduct. On exa- 

 mining a portion of the dissected ovary under the 

 microscope, it will be seen that each of the eggs 

 undergoing development is enclosed in a follicle, 

 which projects from the svirface of the ovary in the 

 form of a rounded, more or less projecting vesicle. 

 On the same piece of ovary are found eggs in all 

 stages of development, from exceedingly small rudi- 



