13 



Svælget er cylindrisk, indtager omtrent Halvdelen af 

 Kroppens Høide og er paa sin indvendige Flade foldet og 

 forsynet med to Svælggruber, som ere temmelig smale; 

 paa dets ydre Flade fæster sig 40 (20 Par) fuldstændige 

 Septa. Fra disse udgaa Mesenterialfilamenterne, imedens 

 G-enerationsorganerne synes at være festede kun til enkelte 

 Septa og da næsten nede ved Mavehulhedens Bund. I de 

 intraseptale Rum aabne de indre Tentakler sig. imedens de 

 ydre korrespondere med de interseptale Kamre. Mesente- 

 rialfilamenterne ere bedækkede med en overordentlig Mængde 

 Xematocyster. der saagodtsom ganske skjule Epithelialbe- 

 klædningen. Antallet af de ufuldstændige Septa kan ikke 

 angives med Sikkerhed, dog forekom de mig at være 4(> 

 Par, nemlig 2 Par i hvert primært interseptalt Ruin. 



Parieto-basilarmuskelen er overmaade tynd og strek- 

 ker sig kun et lidet Stykke opover Kropsvæggen. 



Naar Dyret vil flytte Sted. bliver Fodskiven aæsten 

 tapformig og bevæger sig søgende, forend den fæster sig. 

 Farven bleg rosenrød. Fodskivens Rand gulrød; omkring 

 Mumien en gulrød Ring. Tentaklerne lidt mørkere rosen- 

 røde end Fodskiven og Kroppen. 



Findested. 



Station 338. Et Exemplar. 



— 359. Et sønderrevet Exemplar, der ikke lod 

 sig konservere. 



Slægtskarakter. 



Fodskiven oval. Kroppen bægerformet med Længde- 

 ribber, forsynede med Sugehuler (Suckers). Tentaklerne 

 retraktile. Mange fuldstændige Septa. Mesodermale Cir- 

 kulærmuskler. 



Artskarakter. 



Fodskiven lidt aflang, 16""" bred med 2 halvmaane- 

 formige Indsnit og en lidt indbøiet Rand. forsynet med -40 



Folder. Kroppen bægerformet, 12""" hoi, 16 ' bred med 



4 1 » Længdefolder og ligesaa mange Furer, hvori Insertion- 

 erne af Septa sees. Paa Længdefolderne sees Rækker af 

 Sugehuler. Mundskiven omtrent 45""" bred, lidt hvælvet. 

 Kra Mundaabningen, der er konisk fremtrædende med tykke, 

 foldede Læber, udgaa divergerende mod Skivens Peripheri 

 omtrent 40 Folder, som gaa over Kroppen, og imellem 

 disse ligesaa mange Furer. 2 Rækker korte, retraktile 

 Tentakler, 24 i hver; de i den indre Række ere længst; 

 de i den ydre staa paa Kroppens øverste Rand. Farven: 



the endothelium with its long flagelliform cells appears (Pl. 

 VII, Hg. 9 il). 



The æsophagus is cylindrical, and occupies about 

 half of the height of the body; on its interior surface it 

 is folded, and furnished with two gullet-grooves which are 

 rather narrow. On its exterior surface there are 4U (20 

 pairs) perfect septa attached. From these the mesenterial 

 filaments issne, whilst the reproductive organs appear to 

 be attached only to a few septa. and those almost at the 

 bottom of the gastric cavity. The inner tentacles open 

 into the intraseptal spaces, whilst the miter ones cor- 

 respond with the interseptal chambers. The mesenterial 

 filaments are covered with au extraordinary abundance of 

 mematocysts, which almost entirely conceal the epithelial 

 covering. The number of the imperfect septa cannot be 

 stated with certainty, but it appeared to me that there 

 were 40 pairs. viz. 2 pairs in every primary interseptal 

 space. 



Tlie parieto-basilar muscle is extremely thin, and 

 extends only a short way up the wall of the body. 



When the animal wishes to change its situation, the 

 pedal disc becomes almost cone-formed, and moves itself 

 seekingly before it attaches itself. The colour: pale 

 rosy-red. The margin of the pedal disc yellowish-red ; round 

 the niouth a yellowish-red annulus. The tentacles a, some- 

 what darker rosy-red than the pedal disc and the body. 



Habitat. 



Station No. 338. One specimen. 



„ 359. A torn specimen. which could not 

 be preserved. 



Generic charaeteristics. 



The pedal disc oval. The body erateriform with 

 longitudinal ribs furnished with perforations (suckers). The 

 tentacles retractile. Xumerous perfect septa. Mesodermal 

 circular muscles. 



Specifie charaeteristics. 



The pedal disc somewhat oblong, 16""" in breadth, 

 with two se. 'ilunar incisions, and a somewhat involved 

 margin furnished with 40 folds. The body erateriform, 

 12" 1 "' in height. and 16""" broad; has 40 longitudinal folds 

 and the same number of furrows. in which are seen the in- 

 sertions of septa. On the longitudinal folds series of per- 

 forations (suckers i are observed. The oral disc about 45""" 

 in breadth. and slightly arcuate. From the oral aperture, 

 which is conically projectant and has thick folded labiæ, 

 about 40 folds issue. diverging towards the periphery of the 

 disc and passing over into the body. Between the folds 

 there are the same number of furrows. 2 series of short, 



