105 



Scapus har et tyndt, gjennemsigtigt Overtræk. Capitulum 

 nøgen med en Række marginale, retraktile Tentakler. 

 Physa liden og ikke retraktil. 8 Septa. Cirkulærmusk- 

 Lerne endodermale. Hermaphrodit. 



Artskarakter. 



Legemet 40—50""" langt, S""" bredt, cylindrisk. Scapus 

 lidt opsvulmet paa Midten, forsynet med et tyndt. gjennem- 

 sigtigt, membranøst Overtræk, samt 8 Længdefurer, imellem 

 hvilke 8 Længdefelter, tæt besatte med Sugevorter, der 

 næsten danne Tverrækker. Physa afrundet. blæreformigi 

 opsvulmet, for Størstedelen nøgen og ikke retraktil. Oapi- 

 tulura retraktilt, cylindrisk, 8""" langt, nøgent, glasklart med 

 lignende Furer og Sugevorter sum paa Scapus. Mund- 

 skiven hvælvet med 8 fine Furer, imellem hvilke 8 ophøiede 

 Folder, straalende ud fra den aflange Mund mod Peri- 

 pherien, hvor Furerne dele sig i to. Tentaklerne 16 i en 

 Række, marginale, meget retraktile, omtrent 8""" lange. 

 Farven: Scapus har et fint. grønt, gjennemsigtigt Over- 

 træk. Huden indenfor næsten glasklar, spillende svagt i 

 det Hode med blege, lyserøde Længdefurer. Naar Dyret 

 er fuldt udstrakt, har Capitulum og Physa et svagt rosen- 

 rødt Skjær. Mundskiven rosenrød med 8 blege Furer. 

 Tentaklerne smukt rosenrøde. 



Ved den første Undersøgelse af det ovenbeskrevne 

 Dyr - det vil sige. da jeg paa Expeditionen havde faaet 

 det op af Skraben og ned i Observationskarret, og det 

 der havde udfoldet sig. antog jeg det for en Halcampa, 

 som det jo i sit Ydre lignede meget, Men ved nøieré 

 Granskning, og især ved den anatomiske Undersøgelse, 

 maatte jeg opgive dette: tbi det viste sig da, at Dyret ei 

 alene ikke kunde henføres til den nævnte Slægt, men at 

 det endog maatte ud af Ilyanthidernes Famile. De 8 

 Se] it a maa nødvendigvis her gjøre Udslaget, og jeg har 

 derfor nu indlemmet det i Familien Edwardsinæ, Andres, 

 som kun har to Slægter, Edwardsia, Qvatref. og Edward- 

 siella, Andres. Men hvormeget det end nærmer sig den 

 første, kan jeg dog ikke henføre det dertil; thi baade det 

 tynde, gjennemsigtige Overtræk og Sugevorterne, i Forening 

 med den Omstændighed, at Physa er forholdsvis lidet 

 blottet og ikke kontraktil, forekommer mig at være Karak- 

 terer, der ei tilhører Slægten Edwardsia. men meget 

 mere er fælles for Slægten Halcampa, hvortil den dog af 

 tidligere anførte Grunde ikke kunde henføres. Jeg har 

 derfor dannet en ny Slægt, nemlig Edvardsioides, der fore- 

 kommer mig at kunne danne et Led mellem Slægterne 

 Halcampa og Edwardsia. 



suckers. The scapus has a thin transparent covering. The 

 capitulum bare. with a series of marginal retractile ten- 

 tacles. The physa small and non-retractile. 8 septa. 

 The circular muscles endodermal. Hermaphrodite. 



Specific eharacteristics. 



The body 40—50""" in length. 8™"' in breadth, cyl- 

 indrical. The scapus somewhat swollen at the middle. 

 furnished with a thin. transparent, membranous covering, 

 also 8 longitudinal furrows, between which 8 longitudinal 

 areas closely occupied by suckers. which form nearly trans- 

 verse series. The physa rounded, swollen in sac-form. for 

 the greater part exposed and non-retractile. The capitulum 

 retractile. cylindrical, 8'""' in length. bare, clear as glass, 

 with furrows and suckers like those on the scapus. The 

 oral disc arcuate, with 8 fine furrows. between which 8 

 elevated folds, radiating from the oblong mouth towards 

 the periphery, where the furrows divide into two. The 

 tentacles 16 in number, situated in a single series, mar- 

 ginal, very retractile. about 8""" in length. Tite colour. The 

 scapus has a fine. green, transparent covering. The in- 

 ternal integument clear as glass, with a faint play of red 

 colour. and with pale light-red longitudinal grooves. TVlien 

 the animal is fullv extended the capitulum and physa have 

 a faint rosy-red lustre. The oral disc rosy-red with 8 

 pale grooves. The tentacles beautiful rosy-red. 



Upon the preliminary examination of the above- 

 described animal; that is as soon as I had, when on the 

 North Atlantic Expedition, obtained it from the dredge 

 and deposited it in the glass vessel for observation, and 

 it had there unfolded itself; I took it to be a Halcampa. 

 which it. indeeil. in external appearance much resembled. 

 But upon closer examination. and especially upon anato- 

 mical investigation, I found myself forced to abandon that 

 view T , as it then appeared, that not only was it impossible 

 to assign the animal to that genus, but that it, also. could 

 not belong to the family of the Ilyanthidæ. The 8 septa must 

 necessarily determine the point here. and I have therefore 

 included it in the family of the Edwardsinæ. Andres, which 

 has only two genera. Edwardsia Qvartref. and Edwardsiella, 

 Andres. But however much it approaches to the first- 

 named. I can vet not assign it to it. as both the thin 

 transparent covering and the suckers, in combination with 

 the circumstance that the physa is relatively little exposed 

 and non-retractile, appear to me to be charactistics that 

 do not pertain to the genus Edwardsia. but are much 

 more common to the genus Halcampa, to which. however. 

 for reasons previously stated, it could not be relegated. 

 I have, therefore. formed a new genus viz. Edwardsoides. 

 which appeals, to me, to serve as a link between the 

 genera Halcampa and Edwardsia. 



Den norske Nordhavsexpeditiou. D. C. Uanielssen: Actinida. 



14 



