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Æggene dannes i det ovenbeskrevne Rørs Epithel, da vi 

 iagttog, at i en sammenhængende Gruppe af disse Epi- 

 thelceller vare nogle af dem næsten omformede til Æg- 

 celler, imedens de andre vare uforandrede. Æggetraa- 

 dene manglede hos de fleste af de Exemplarer, vi have 

 undersøgt, kun hos et Par vare de hele, og her viste de 

 sig at være tynde som en nogenlunde fin Sytraad. — 

 Cementkjertlerne (Kitkjertlerne) ligge tæt ved Siden af 

 den udvidede Del af Tarmrøret (Maven), saaledes at dette 

 ligger imellem dem. De ere noget dækkede af Oviduc- 

 terne, nærme sig mere Bugfladen end disse, ere 42 Mm. 

 lange, 1,5 Mm. brede, have en meget fladtrykt Form, ere 

 glatte og af en melkehvid Farve. Fra deres øverste Ende 

 tager Udførselsgangen, der er rund og fyldt af Cement, 

 sin Begyndelse, og løber da slyngeformigt ned imod det 

 Sted, hvor Oviducten gaar over i Æggetraaden; her ud- 

 munder Udførselsgangen for Cementorganet i Oviducten. 

 Baacle Cementkjertlerne og deres Udførselskanal ligge 

 omgivne af Peritoneum. 



Paa flere af de Exemplarer, vi undersøgte, har der 

 vist sig flere Uregelmæssigheder med Hensyn til Cement- 

 organerne. Saaledes var paa et Exemplar begge Cement- 

 kjertiernes øverste Ender sammenvoxne, og derfra udgik 

 kun en Udførselsgang, som var meget tyk (Fig. 4 a); men 

 nogle Millimeter længere nede delte denne sig i to Grene, 

 hvoraf hver indtog sit sædvanlige Leie (Fig 4 b, b). Den 

 ene af disse Grene deler sig atter i to Grene (Fig. 4 c, c), 

 hvilke, efter i en Længde af omtrent 40 Mm. at være 

 adskilte, smelte sammen til en Kanal (Fig. 4 d), der da 

 paa almindelig Vis udmunder i Oviducten. Denne sidste 

 Deling af Udførselsgangen fandt vi at være tilstede paa 

 4 af de 6 Exemplarer, vi undersøgte, saa det tør maaske 

 hænde, at denne Ordning er den almindeligste. 



Paa Oviductens nederste Del, lidt ovenfor det Sted, 

 hvor Cementkjertelens Udførselsgang udmunder, sees paa 

 hver Side en temmelig tynd og kort Kanal, der gaar ud 

 i de paa Bugfladen tidligere beskrevne Papiller. Foruden 

 de føromtalte Muskler findes der i Hovedet et temmelig 

 sammensat Muskelapparat. Paa hver Side af Svælget 

 iagttoges en stor Mængde stærke Muskler. Hver Muskel 

 tager sit Udspring med en tydelig Tendo, fæstet i den 

 indvendige Hulhed af en Knude, og gaar saa paatvers 

 vifteformigt henimod clen indvendige Væg af Hovedets 

 Chitinhud. Disse Muskler ere, i saa stor Mængde tilstede, 

 at de ganske udfylde Hovedets Side- og Bag-Partier. 

 Nærmest Svælget sees paa begge Sider flere længere 

 Muskler, der fæste sig paa Spiserøret og have et fast 

 Punkt ligeledes i de Knuders Hulhed, der nærmest om- 

 give Mundaabningen. Fibrillerne i disse Muskler ere 

 stribede paatvers. 



Nervesystemet udgaar fra to store aflange Ganglier, 

 der have deres Sæde paa Bugsiden af Svælget og ere 

 sammensmeltede i Midten. Fra disse Ganglier udløber 

 en temmelig tyk Hovedstamme, der følger Spiserøret til 



ova are formed in the epithelium of the tube above 

 described; as we remarked that in a continuous group 

 of these epithelial cells, some of them were nearly trans- 

 formed into egg-cells, while the others were unchanged. 

 The ovisacs were wanting in most of the specimens we 

 examined: only in a few, they were entire; and here they 

 proved to be as thin as a rather fine sewing-thread. The 

 cement-glands lie close to the side of the enlarged part 

 of the alimentary canal (the stomach), so that the latter 

 lies between them. They are to some extent covered by 

 the oviducts, and are nearer to the ventral surface than 

 the oviducts are; they are 42 Mm. long, 1,5 Mm. broad; 

 their form is much flattened; they are smooth and of a 

 milk-white color. From their upper extremity, the excre- 

 tion-canal, which is round and full of cement, takes its 

 beginning, and then runs sinuously down towards the place 

 where the oviduct goes over into the ovisac; here is the 

 disemboguement of the excretion-canal for the cement-organ 

 in the oviduct. The cement- glands and their excretion- 

 canal are surrounded by the peritoneum. 



In several of the specimens which we examined, there 

 appeared many irregularities with respect to the cement- 

 organs. Thus in one specimen, the upper extremities of 

 both the cement-glands were connate; and there issued 

 from the same only one excretion canal, which was very 

 thick (fig. 4 a); but some millimeters lower down, it divided 

 itself into two branches, each of which occupied its usual 

 bed (fig. 4 b, b). One of these branches separates again 

 into two branches (fig. 4 c, c), which, after having been 

 separate for a length of about 40 Mm., coalesce in a canal 

 (fig. 4 d) which then, in the usual manner, has its issue 

 in the oviduct. This last division of the excretion-canal 

 was found to exist in 4 of the 6 specimens we examined; 

 so that it may be that such is the more ordinary arran- 

 gement. 



On the lowest part of the oviduct, a little above the 

 place where the excretion-canal of the cement-glands has 

 its orifice, there is on each side a rather slender and short 

 canal going out into the papillæ, previously described, on 

 the ventral surface. Besides the muscles before noticed, 

 there is in the head a rather complex muscular apparatus. 

 On each side of the gullet, there appear a great number 

 of strong muscles. Each muscle takes its beginning with 

 a distinct tendon, attached in the interior cavity of a 

 tubercle, and then goes transversely fan-like towards the 

 interior wall of the chitinous integument of the head. 

 The muscles are present in such great numbers, that 

 they entirely occupy the lateral and posterior parts of 

 the head. Nearest to the gullet, there appear on both 

 sides several longer muscles attached to the oesophagus 

 and having likewise a fixed point in the cavity of the 

 tubercles which most closely sorround the oral aperture. 

 The fibrillæ in the muscles are striped transversely. 



The nervous system proceeds from two large oblong 

 Ganglia situated on the ventral side of the gullet and 

 coalescing in the middle. From these ganglia, there 

 issues a rather thick main trunk, which accompanies the 



