115 



Findested. 

 Station 262. To Exemplarer. 



Artskarakter. 



Legemet med Tentakler 55""" langt. Scapus 28""" 

 lang, cylindrisk, forsynet med en stærkt inkrusteret Skede 

 og 8 fine Linier, imellem hvilke 8, temmelig brede Længde- 

 felter, hvori 2 Rækker yderst smaa Papiller, staaende ved 

 Siden af hinanden og forsynede med en fin Aabning. Capi- 

 tulum 12""" langt, rørformet, har opimod Mundskiven 12 

 kastaniebrune Ribber, der et Stykke bagtil smelte sammen 

 til 8. Mundskiven hvælvet ; Munden aflang, og fra den 

 udgaa 12 Folder henimod Peripherien, som indtages af 

 12 retraktile Tentakler. Hele Oapitulum kan inddrages i 

 Scapus. Physa danner en halvkugleformig, vandklar Blære 

 med 8 fine Længdestriber. Saavel paa Oapitulum som 

 Physa tindes Papiller. Farven: Oapitulum svagt brunrød 

 med 12 temmelig brede, mørkt kastaniebrune Linier. imellem 

 hvilke blegere farvede Længdefelter. Mundskiven kjødrød; 

 Tentaklerne have 3 mørkebrune Ringe. Scapus er brun, 

 men indenfor Skeden er Huden næsten hvid, spillende 

 noget i det Rosenrøde. Phvsa svagt laxerød. 



Edwardsia costata. 



Tab. XVI. Fig. 11. 12. 



Legemets hele Længde er lid""". 



Scapus er cylindrisk, 4(1'"'" lang. indtil 10'""' bred, 

 men smalner lidt af opimod Oapitulum og nedad mod 

 Physa. Den er forsynet med 8 stærkt fremspringende 

 Længderibber, der hver har en Række smaa, faste, lidt 

 koniske Papiller, paa hvis Midte sees ved Hjælp af Loupen 

 en liden rund Fordybning (Aabning?) Tab. XVI, Fig. 11, 

 12 a, og er beklædt med et noget rynket, lidt inkrusteret. 

 skedeformigt Overtræk, der blev ganske glat, naar Dyret 

 var i Vigør og fuldt udspændt. Imellem Ribberne er der 

 8 næsten plane Længdefelter. som blive til dybe Furer 

 under Kontraktionerne, Tab. XVI, Fig. 12 b. 



Oapitulum. der er 12'""' langt, omtrent 6""" bredt ved 

 Overgangen til Scapus, men 4""" opimod Mundskivens Rand, 

 er cylindrisk. gjennemsigtigt og forsynet med S Ribber, der 

 ere Fortsættelser af de paa Scapus, men rage ikke saa 

 langt frem som disse og strække sig op til den ydre Ten- 

 takelrække. Ogsaa paa disse Ribber sees en Række Papil- 

 ler, der dog her staa mere spredte, Tab. XVI, Fig. 11 b. 

 Mundskiven er stærkt konisk fremspringende med en næsten 

 rund Mundaabning, som har paa Randen 8 tynde Folder, 



Habitat. 

 Station Xo. 262. Two specimens. 



Speciflc eharacteristics. 



The body with the tentacles, 55""" in length. The 

 seapus 28""" in length, cylindrical, furnished with a strongly 

 encrusted sheath, and 8 fine lines between which 8 rather 

 broad longitudinal folds, in which 2 series of extremely 

 minute papillæ, placed alongside each other and furnished 

 with a minute aperture. The capitulum 12""" in length. 

 tubular; up towards the oral disc has 12 chestnut-brown 

 ribs. which, at a little distance backwards, resolve themselves 

 into 8. The oral disc arcuate. The mouth oblong, and 

 from it 12 folds issne towards the periphery, which is oc- 

 cupied by 12 retractile tentacles. The entire capitulum 

 capable of being withdrawn into the scapus. The physa 

 forms a semi-spherical pellucid vesicle having 8 fine longi- 

 tudinal stripes. On the capitulum as well as on the 

 physa papillæ visible. Tlie colour. The capitulum faint 

 brownish-red, with 12 rather broad dark chestnut-brown 

 lines, between which lighter-coloured longitudinal areas. 

 The oral disc iiesh-coloured. The tentacles have 3 dark- 

 brown annuli. The scapus is brown, but inside the sheath 

 the integument is almost white with a play of rose-red 

 colour. The physa pale salmon-colour. 



Edwardsia costata. 



Pl. XVI, fig. 11. 12. 



The entire length of the body is 60""". 



The scapus is cylindrical. 40""" in length, and as much as 

 10""" in breadth, but diminishes a little in breadth upwards 

 towards the capitulum and downwards towards the physa. 

 It is furnished with 8 strongly prominent longitudinal ribs, 

 each of which has here a series of minute, finn, slightly conical 

 papillæ, in whose middle there is seen, with the aid of 

 the magnifying glass, a small round depression (aperture) 

 (Pl. XVI, fig. 11, 12 a). It is clad with a somewhat 

 wrinkled, slightly encrusted, vaginate covering, which became 

 quite smooth when the animal was in full vigour and fully 

 expanded. Between the ribs there are 8, almost plane. 

 longitudinal areas, which become deep furrows during the 

 contractions (Pl. XVI. fig. 12 6). 



The capitulum measures 12'""' in length, and about 

 6""" in breadth at the point where it passes into the scapus, 

 but only 4""" in breadth up towards the margin of the 

 oral disc. It is cylindrical, transparent, and furnished with 

 8 ribs, which are prolongations of those of the scapus but 

 do not extend so far forward as them, and they extend 

 themselves up towards the outer tentacular series. Upon 

 those ribs, also, there is observed a series of papillæ, but 

 which are placed here more dispersedly (Pl. XVI, fig. 



15* 



