45 



aflang Aabning (Pedal-Stomata), hvorigjennem Kamrene 

 kommunicere med hverandre forneden. 



Findested. 

 Station 290. 3 Exemplarer. 



Tealidæ, Hertwig '. 



Tealiopsis polaris, n. g. et sp. 



Tab. I, Fig. 7, 8. Tab. VIII, Fig. 2, 3. 



Fodskiven er rund, dobbelt saa bred som Kolumnen 

 med en temmelig tyk, uregelmæssigt bugtet Rand; dens 

 Dndefflade er stærkt foldet, og Folderne udstraale vifte- 

 formigt fra Oentrum mod Peripherien. 



Kroppen er cylindrisk, henved 30"™ hoi og saavel 

 denne som Podskiven er ganske inkrusteret af smaa, hvide 

 Skjælstykker samt Sandkorn. Tab. I, Fig. 7, der svare til 

 Bundens Beskaffenhed. Denne viste sig nemlig at beståa 

 af umaadelige Masser knuste Skjæl, men var forøvrigt 

 yderst fattig paa Dyr. Kun den øverste Fjerdedel af 

 Kroppen er fri for Skjælbeklædniiigen. som temmelig let 

 kan fjernes, og viser sig da at beståa af et meget klæbrigt 

 Slim. der tjener som Bindemiddel for Skjælstumperne. Den 

 nogne, øverste Del af Kroppen er glat. halv gjennemsigtig, 

 saa at Mesenterialfilamenterne og Septa ere synbare, og 

 dens øverste Band er fri, afrundet, svagt dentikuleret. 

 Borttages Skjælbeklædningen, sees Kropsvæggens ydre Plade 

 at være tæt besat med Sugevorter (Snokers), der staa i 

 regelmæssige, longitudinelle Rækker, mellem hvilke sees 

 fine. glatte Linier, som antyde Insertionerne af Septa, 

 Tab. I, Fig. 8. 



Mundskiven er noget hvælvet, fint foldet. Den paa- 

 tversgaaende Muml er lidt konisk fremstaaende med af- 

 rundet Band og smale G-onidiegruber, Tab. I, Fig. 7. 



Tentaklerne ere retraktile, temmelig tykke, omtrent 

 saa lange som Skivens Bredde og staa i o Rækker. De 

 i den inderste Række ere tykkest og længst og udgjøre 

 24; den mellemste Række afvexler med den inderste Ræk- 

 kes Tentakler og har samme Antal; i den yderste Række, 

 der staar strax indenfor Kroppens øverste Band, er der 

 28. Saavel Mundskiven som Tentaklerne kunne ganske 

 skjules af Kroppens øverste Band under Dyrets Sammen- 

 træknine. 



1 Jeg har fundet det nødvendigt at beholde Familien Tealidæ, 

 der er opstillet af Hertwig, men senere af ham inddraget. 



transversal muscles on the other side. The (i pairs of 

 principal, perfect septa have. where they insert themselves 

 in the pedal disc, a very large oblong orifice (Pedal-stomata) 

 through which the chambers communicate with each other 

 below. 



Habitat. 

 Station Xo. 290. Three specimens 



Tealidæ, Hertwig 1 . 



Tealiopsis polaris, n. g. et sp. 

 Pl. I. fig. 7. s. PL VIII. fig j. :;. 



The pedal disc is round, twiee as broad as the column, 

 and has a, rather thick, irregularly indented margin ; its 

 under-surface is strongly folded, aud the folds radiale in 

 flabelliform from the centre towards the periphery. 



The body is cylindrical, and measures about 30 mm in 

 height. It, as well as, also, the pedal disc. is quite en- 

 crusted with small white fragments of shells and -ruins 

 of sand (Pl. I, fig. 7), corresponding tu the nature of the 

 sea-bottom. That showed itself to consist of immense 

 masses of bruken shells hut was otherwise extremeh 

 destitute of animal lite. Only the uppermost fourth-parl 

 of the body is destitute of the shell-covering, which can 

 quite easily be removed, and then appears to consist of a 

 very sticky mucous that serves as a cemeiit for the shell- 

 fragments. The uncovered uppermost part of the bodj is 

 smooth and semi-transparent, so that the mesenterial-fila- 

 ments and septa are visible, and its uppermost margin is 

 free, rounded and faintly denticulated. If the shell cover- 

 ing is removed the external surface of the body-wall is 

 seen to be closely beset with suckers, placed in regular 

 longitudinal series, and between which slender smooth lines 

 are seen, indicating the insertions of the septa (Pl. I, 

 fig. 8). 



The oral disc is somewhat arcuate and finely folded. 

 The transversally placed mouth is slightly conieally pn>- 

 tuberaut. and has a rounded margin and narrow gonidial 

 grooves (Pl. I, fig. 7). 



The tentacles are retractile, rather thick, about as 

 long as the breadth of the disc. and situated in three 

 series. Those in the innermost series are thickest and 

 longest, and are 24 in number. The iiitermediate series 

 alternates with the tentacles of the innermost series and 

 has the same number of tentacles. In the outermost series, 

 which is situated immediately inside the uppermost margin 

 of the body, there are 28 tentacles. Both the oral disc 

 and the tentacles may be quite concealed by the uppermost 

 margin of the body during the animal's contraction. 



1 I have found it necessary tu retain the family Tealidæ, 

 established by Hertwig, but subsequently withdrawn by him. 



