50 



som Hertwig allerede har tildelt dem. Madoniactis kom- 

 mer altsaa indtil Videre til at danne et Led imellem Fami- 

 lierne Bunodidæ, Andres, og Sagartidæ, Gosse, Hertwig. 



Findested. 



Saltstrommen, Lofoten. 90 Favne. 



Slægtskarakter. 



Fodskiven rund. lidt videre end Kroppen. Denne er 

 eylindrisk, omtrent lige hoi som bred, glat, forsynet med 

 spredte Cinclides. Parapet og Fossa. Tentaklerne i flere 

 Rækker, retraktile. korte. Saavel Tentakler som Mund- 

 skive dækkes af Kroppens Rand. De fuldstændige Septa 

 6 Par, golde. Acontier. De cirkulære Muskler udpræget 

 endodermale. 



Artskar akter. 



Fodskiven rund, tyk, noget videre end Kroppen med 

 en tyk, noget unduleret Rand. Kroppen eylindrisk. iii;it. 

 glindsende, omtrent lige hoi som bred, forsynet med spredte, 

 yderst smaa, gjennemborede Fremstaaenheder (Cinclides), 

 hvorigjennem Acontier ndstødes. Kroppens overste Rand 

 afrundet, fri; Parapet. indenfor hvilket en Pordybning 

 (Fossa). Kroppens Hud fast. membranøs, halvt gjennem- 

 sigtig. Mundskiven næsten flad, dækkes tilligemed Ten- 

 taklerne ganske af Kropsranden under Sammentrækningen. 

 Munden aflang med tykke Læber og tu brede Gonidie- 

 furer. Tentaklerne retraktile. tykke, temmelig korte, danne 

 4 Rækker: 12 i den Iste — inderste — Række, hvilke ere de 

 tykkeste; 12 i 2den, 18 i 3die g 36 i 4de Række. 



Samtlige Tentakler rigt besatte med Nematocyster. 

 Farven: Kroppen gulrød med markere dels Striber, dels 

 Flækker. Mundskiven Rosa med fine, røde Straaler, der 

 blive bredere og morkere henimod Tentaklerne og danne 

 Ringe om deres GTrunddel. Mundens Læber stærkere mile 

 end Skiven. Gonidiegruberne ere bleg gulrode. Svælg- 

 røret, der let udkrænges, hvidgult. Tentaklerne bleg gul- 

 røde med 1 til 2 brede, rode Ringe, foruden den Ring, 

 som tindes ved Granden. 



predominance that Hertwig has already assigned it. The 

 Madoniactis must therefore, for the present, form a link 

 between the families Bunodidæ, Andres, and Sagartidæ, 

 Gosse, Hertwig. 



Habitat. 

 Saltstrommen, Lofoten. Depth. 90 fathoms. 



Generie charaeteristics. 



The pedal disc round, a little wider than the body. 

 The latter is cylindrical, about the same in height as in 

 breadth, smooth, furnished with dispersed cinclides. Parapet 

 and tusse. The tentacles in several series, retractile, short. 

 Both the tentacles and the oral disc covered by the margin 

 of the body. 6 pairs of perfect septa. sterile. Acontia. 

 The circular muscles distinctlv endodermal. 



Specific charaeteristics. 



The pedal disc round. thick, somewhat wider than 

 tlie body, with a thick somewhat undulating margin. The 

 body cylindrical, smooth. lustrous, about the same in height 

 as in breadth, furnished with scattered, extremely minute, 

 perforated protuberances (Cinclides) through which the 

 acontia are projected. The uppermost margin of the 

 body rounded, free. Parapet, inside of which a depres- 

 sion (Fosse). The integument of the body finn. membran- 

 ous, semi-transparent. The oral disc almost flat; it as 

 well as the tentacles completely covered by the margin of 

 the body during contraction. The moutli oblong, witli 

 thick labiæ and two broad gonidial grooves. The tenta- 

 cles retractile, thick, rather short. funn 4 series; 12 in 

 the innermost series, which are also the thickest ones; 12 

 in the second series ; 18 in the third series, and 36 in 

 tlie fuurth series. 



All the tentacles richly beset with nematocysts. 

 Colour: The body yellowish-red with, partly stripes partly 

 patches of a darker colour. The oral disc rose colour, 

 with fine red ravs which become broader and darker 

 towards the tentacles and form annuli round their bases. 

 The oral labiæ brighter red than the disc. The gonidial 

 grooves are pale yellowish-red. The æsophagus, which is 

 easily everted, whity-yellow. The tentacles pale yellowish- 

 red with 1 to 2 broad. red annuli, besides the annulus 

 found at the hase. 



