32 



tale Rum er meget vidt; de transverselle Muskler ligge 

 som en fint foldet Lamelle paa den indre Flade af Sep- 

 tumet saaledes. at de vende mod hinanden. imedens de 

 longitudinelle Muskler ere festede paa den ydre Flade 

 og vende til det interseptale Rum. De 4 øvrige principale 

 Septapar have Musklerne saaledes ordnede, at de longitudi- 

 nelle vende mod det intraseptale Rum og danne tykke 

 Buske, der henimod Svælgrøret ere saa fremspringende, 

 at de udfylde Ruminet; de transverselle Muskler vende 

 mod det interseptale Rum. De 6 Par fuldstændige Septa 

 ere golde. 



I det principale Kammer, som opstaar imellem 2 

 principale Septapar. er der 3 Par Septa af 2deu Orden, 

 hvorved hvert Hovedkammer deles i 4 secundære Kamre. 

 og i ethvert saadant Kammer er der 1 Par Septa af 3die 

 Orden. Af de 3 Par secundære Septa er det midterste 

 længst og naar næsten lige hen til Svælgrøret ; de 2 øvrige 

 ere meget kortere, bære Generationsorganer , som ere 

 opfyldte af Æg i forskjellige Udviklingsstadier, samt en 

 Mængde Acontier og Mesenterialfilamenter. Musklerne ere 

 temmelig udviklede paa disse secundære Septa: saaledes 

 danne de longitudinelle Muskler, der ligge paa den indre 

 Flade imod det intraseptale Rum. tykke Buske, der næsten 

 panske udfylde Ruinniet. imedens de transverselle Muskler 

 ligge paa den modsatte Side og vende mod det intersep- 

 tale Rum. De 4 Par tertiære Septa ere meget korte, 

 knap halvt saa lange som de secundære, have Musklerne 

 placerede som disse og bære i rigelig Mængde Kjøns- 

 organer, hvori Æg af alle Størrelser, samt tildels Acontier. 

 Disse korte, tertiære Septapar staa temmelig gabende, idet 

 Musklerne ere lidet udviklede. Parieto-basilarmuskelen er 

 tynd og udbreder sig opad paa den nederste Trediedel af 

 Kropsvæggen og nedad et Stykke udover Fodskiven. 



the intraseptal space is very wide : .the transversal muscles 

 lie like a finely folded lamella on the inner surface of 

 the septum, in such manner that thev face towards each 

 other. while the longitudinal muscles are adherent to the 

 outer surface. and face the interseptal space. The 4 re- 

 maining pairs of principal septa have muscles arranged in 

 such manner, that the longitudinal ones face towards the 

 intraseptal space and form thick frutici, which are. in 

 proximity to the æsophagus, so protuberant, that thev fill 

 the space; the transversal muscles face towards the inter- 

 septal space. The 6 pairs of perfect septa are sterile. 



In the principal chamber which arises between 2 pairs 

 of principal septa. there are 3 pairs of septa of the 2nd 

 order, causing each principal chamber to he divided into 4 

 secondary chambers. and in each of these chainbers there 

 »is a pair of septa of the 3rd order. Of the 3 pairs of 

 secondary septa. the intermediate pair is the longest one, 

 and extends almost quite to the æsophagus; the two others 

 are rauch shorter, and carry reproductive organs which 

 are filled with ova in various stages of development, also 

 a multitude of acontia and mesenterial filaments. The 

 muscles are pretty well developed on these secondary septa: 

 the longitudinal muscles. which lie upon the inner surface 

 facing towards the intraseptal space. tonn. tims. thick 

 frutici which almost completely fill the space. while the 

 transversal muscles lie on the opposite side and face towards 

 the interseptal space. The 4 pairs of tertiary septa are 

 very short. scarcely half the lengt h of the secondary ones. 

 but thev have the muscles placed like them, and thev carry 

 in rich abundance reproductive organs, in which are ova of 

 all si/es. and also, to some extent, acontia. Those short 

 pairs of tertiary septa stand rather gapingly apart as 

 the muscles are only little developed. The parieto-basilar 

 muscle is thin, and distributes itself upwards on the 

 lowest third-part of the wall of the body and downwards 

 a little way over the pedal disc. 



Findested. 



Habitat. 



Station 323. Flere Exemplarer, hvoraf kun 



* enkelte havde det hudagtige Over- 



træk i større eller mindre Dd- 



strækning. 



— 32<i. Mange Exemplarer, hvoraf de fleste 



vare forsvnede med ( (vertrækket. 



Artskarakter. 



Fodskiven dels rund. dels dannet etter den Gjenstand. 

 hvortil den er festet, med en tynd, ujævn Rand. Krop- 

 pen cylinderformet, indkneben paa Midten, indtil 60""" høi, 

 omkring 50""" bred; de nederste 4 Femtedele ere omgivne 

 af et rut, hudet Overtræk (coating), sammensat af Ler. 

 Saml og Slim. Den øverste Femtedel nøgen, glat, rig paa 



Station No. 323. 



326. 



Several specimens, of which only 

 a few had the integuniental outer 

 covering, in greater or lesser 

 extent. 



Many specimens of which most 

 were furnished with the integu- 

 niental covering. 



Speeific characteristics. 



The pedal disc is partly round, partly formed ac- 

 cording to the object to which it is attached, and has a 

 thin, uneven margin. The body cylindrical. constricted 

 at the iniddle. measures about 60""° in height and about 

 50""" in breadth. The lowest four-fi-fths-part is surrounded 

 by a rough integuniental coating, composed of clay, sand. 



