24 



Artskarakter. 



Fodskiven rund, 35'""' i Tversnit, med tyk, indbøiet 

 Rand, omfattende levende Exemplarer af Neptunia curta, 

 JeflV. (Friele), og antager derved en aflang Form. Skiven 

 tynd. med tine. fra Centrum udstraalende Linier. Kroppen 

 cyliridrisk, omtrent lige hoi som bred og stærkt foldet paa- 

 tvers, overalt forsynet med spredte Cinclides imellem Fol- 

 derne. Dens øverste Rand danner en fritstaaende, krenu- 

 leret Vold (Parapet); imellem denne os Tentaklerne en 

 dvli Grube (Fossa). Mundskiven rund. flad, med tine Fol- 

 der straalende ud fra Munden imod Tentaklerne. Mumien 

 aflang, foldet paalangs. Læberne tykke, trelappede. Mund- 

 vigene' halvmaaneformige med en haard Rand. Tentaklerne 

 korte, retraktile, sidde i 2 Rækker, 24 i hverj; de inderste 

 ere længst og tykkest. Mundskiven kau skjules af Krops- 

 randen. Farven: Kroppen gul, spillende lidt i det Brune; 

 paa dens øverste Rand, ligesom paa Mundskiven, smuk 

 rosenrød. Omkring Munden en purpurrød, aflang Ring. 

 Folderne paa Skiven ere mørkere farvede end denne. Ten- 

 taklerne bleg violette. 



Anthosactis ' Jan Mayeni. n. g. et sp. 



Tab. II. Fig. 1; Tat/. X, Fig. I. 



Fodskiven er rund. noget videre end Kolumnen, om- 

 trent 50""" i Tversnit. med en tyk. lidt undulerende Rand. 

 Den undre Flade er lidt udhulet. især i Centrum. hvorfra 

 udgaa, divergerende mod Randen, en stor Mængde Folder, 

 imellem hvilke der er ligesaa mange Furer, som svare til 

 Skillevæggenes Insertioner. 



Kroppen er cylindrisk. henved -t* » ' bred et Stykke 

 ovenfor Fodskiven, men bliver noget bredere op imod Mund- 

 skiven; den er omtrent halvt saa hoi som Skivens Bredde, 

 naar denne med Tentaklerne er fuldt udslaaet; dens 

 øverste Rand er temmelig tynd. lidt uuduleret og dens 

 ydre Flade glat, glindsende, forsynet med svagt fremstaa- 

 ende, brede Længdefolder, der især ere tydelige opimod 

 Randen, og imellem hvilke sees Cinclides, Tab. II, Fig. 1. 

 Disse Længdefolder forsvinde saagodtsom ganske, naar 

 Dyret er helt udstrakt, og da sees kun tine Længdelinier, 

 som omgive Insertionerne af Skilleva^ggene. Imellem disse 

 Linier sees temmelig tydelig Længdemusklerne, der ere 

 omtrent 0.5""" brede. Kroppens Hud er tynd. fast. næsten 

 membranøs og halv gjennemsigtig i udspændt Tilstand. 



-/M^o; 



en Blomsl. 



Speeiflc characteristies. 



The pedal disc round, 35""" from side to side. with 

 thick involved margin, embraces living specimens of Nep- 

 tunia curta. Jeffr. i Friele) and acquires, thus. an oblong 

 form. The disc thin. with fine lines radiating from the 

 centre. The body cylindrical, about as high as it is broad, 

 and strongly jfolded transversally, furnished, everywhere 

 between the folds, with scattered cinclides. Itsuppermost 

 margin forms a free, erect, crenate wall (Parapet), and between 

 that and the tentacles there is a deep cavity (fosse). The 

 oral disc. round. Hat. with fine folds radiating from the 

 mouth towards the tentacles. The niouth oblong, folded 

 longitudinally. The labiæ thick and trilobate. The oral 

 angles semilunate, with a hard margin. The tentacles 

 short, retractile, seated in 2 series. 24 in eacb; the ten- 

 tacles of the innermost series are the longest and thickest. 

 The oral disc capable of being concealed by the margin 

 of the body. Colour : Body yellow, shading a little to 

 brown: on it-- uppermost margin, and also on the oral 

 disc, a beautiful rose-red. Around the mouth. a purple- 

 ii il. oblong annulus. The folds on the disc are darker 

 coloured than the disc itself. The tentacles pale violet. 



Anthosactis ' Jan Mayeni. n. g. et sp. 



Pl. I!, fig. 1 : Pl. X. fig. 1. 



The pedal disc is round, somewhat wider than the 

 column, measures about 50""" across, has a thick. somewhat 

 nndulating margin. The under surface i- a little concave, 

 especially in the centre. from which proceed a great num- 

 ber of folds, diverging towards the margin and having be- 

 tween them the same muuber of furrows. corresponding to 

 the insertions of the divisional walls. 



The body is cylindrical: it is. a little way above the 

 pedal disc. about 40""" in breadth, but increases somewhat 

 in breadth up towards the ora] disc; it is about half as 

 high as the breadth oi the disc. when that and the tenta- 

 cles are fully extended. Its uppermost margin is rather 

 thin and somewhat undulated, and the external surface 

 is smooth. shining. and furnished With faintly projecting, 

 broad longitudinal folds which are especially distinct up 

 towards the margin: between the folds cinclides are 

 observed (Pl. II. fig. 1 1. These longitudinal folds almost 

 quite disappear when the animal is entirely extended. 

 and then onlv fine longitudinal lines are seen. which indi- 

 cate the insertions of the divisional walls. Between these 

 lines rather distinct longitudinal muscles are observed. mea- 

 suring about 0.5""" in breadth. The integument of the body 

 is thin, finn, almost membranous, and semi-transparent 

 when in expanded condition. 



avjo? = A flower. 



