39 



der ikke lod sig genere, men syntes at befinde si^; ret vel 

 ved sine Kjøreture, idet den udfoldede baade Krop og 

 Tentakler i fuld Vigør, saa Afbildningen foregik uden 

 synderlige Hindringer. 



Artskarakter. 



Podskiven omfatter Størstedelen at' Conchylien af 

 Fusus Krøyeri, har en tynd, uregelraæssig og lidt undule- 

 rende Rand. Paa Fodskivens Underflade afsondres en 

 chitinagtig Membran, der hinder Koden til Conchylien. 

 Kroppen urneformet, næsten dobbelt saa hoi som tyk og 

 smalest strax ovenfor Podskiven; dens Overflade glat med 

 brede, lidt ophoiede Længdefolder, hvor der, især paa den 

 nederste Halvdel, sees Cinclides. uregelmæssigt ordnede. 

 Mundskiven bredere end Kolumnen, lidt hvælvet og foldet. 

 Munden fremstaaende, ottelæbet, aflang, med 2 brede Goni- 

 diegruber, og i liver af dem 2 smaa Gonidieknuder. Ten- 

 taklerne retraktile, korte, tynde og perforerede i Spidsen; 

 de staa i 3 alternerende Rækker, 48 i hver Række. Krop- 

 pens Væg halv gjennemsigtig, saa Mesenterialfilamenterne 

 sees; Farven: Kroppen karmpsinrød med lyserøde Længde- 

 striber. Mundskiven, ligesc-m Tentaklerne, lileg chamois. 

 Folderne paa Mundskiven kanske lidt blegere. Farven 

 varierer forresten noget paa de forskjellige Individer fra 

 Lak til Karmin. Gonidiegruberne lidt intensere rode end 

 Mundlæberne. 



Familie Bunodidæ, Gosse. 

 Bunodes abyssorum. a. sp. 



Tab. III, Fig. :',. Tab. X, Fig. 8, 9. 



Podskiven rund, noget bredere end Kolumnen, med 

 en temmelig tyk, svagt undulerende Rand. Underfladen 

 er rig paa concentriske, rynkede Ringe, som aftage mod 

 Centrum, hvor der tindes en traktformig Fordybning, i 

 hvis Bund er en rund Aabning, der korresponderer med 

 ( rastralhulheden. 



Kroppen er valseformig, aftagende noget i Tykkelse 

 ned mod Podskiven. Den er i udstrakt Tilstand omtrent 

 250""" hoi og 200""" i Omkreds; naar den er sammentruk- 

 ken, er den 150""" hoi og 230""" i Omkreds. Kroppens 

 udvendige Flade er forsynet med Længdefolder, paa hvilke 

 iagttages temmelig regelmæssige Rækker Kunder, lige fra 

 Mundskiven til Poden, Tab. III, Fig. 3. Disse Kimder 

 staa, tættest og ere stærkest fremtrædende paa den øverste 

 Del af Kroppen, men blive storst paa Midten, imedens de 



the latter did not seem at all disturbed, but appeared to 

 perfectly well enjoy the ride. as it unfolded both body and 

 tentacles in full vigour, enabling the illustration to he 

 effected without particular difficulty. 



Speeiflc charaeteristies. 



Tin' pedal disc embraces the greater part of the 

 shell of Fusus Krøyeri, has a thin. irregular, and slightly 

 undulating margin. On the under-surface of the pedal disc, 

 there is deposited a chitinous membrane which secivres 

 the base to the shell. The body is urn-shaped, almost 

 twice as high as it is thick, and it is narrowest immediately 

 above the pedal disc. Its external surface is smooth, with 

 broad. slightly elevated longitudinal folds, upon which, 

 especially on the lowest half, cinclides are observed, ar- 

 ranged irregularlv. The oral disc is broader than the 

 colunin, slightly arcuated and folded. The mouth protu- 

 berant, octo-labiate, oblong, with 2 gonidial grooves, having 

 in each of them 2 small gonidial nodules. The tentacles 

 retractile, slunt, thin, and perforated at the point; they 

 are placed in 3 alternating series. 48 in each series. The 

 wall of the body senii-transparent, so tliat the mesenteria] 

 tilanients can be seen. The colour. The body carmine-red 

 witli light-red longitudinal stripes. The oral disc. as also 

 the tentacles, pale huff colour. The folds on the oral disc 

 are. perliaps. a little fainter in colour. The colour varies, 

 however. somewhat in the different individuals, from scarlet 

 to carmine. The gonidial grooves are a little 

 red than the oral labiæ. 



brighter 



Family Bunodidæ, Gosse. 

 Bunodes abyssorum. n. sp. 



Pl. III, fig. :'>. P!. X, fig. s. (i. 



The pedal dise round, somewhat broader than the 

 colunin, has a rather thick, faintly undulating margin. The' 

 under-surface is rich in eoneentrie. shrunken annuli. which 

 diininish towards the centre. where there is an iufundibuli- 

 form depression, in whose base a round orifiee appears, 

 communicating with the gastric cavity. 



The body is cylindrical, diminishing somewhat in 

 thiekness down towards the pedal dise. In exteiided con- 



dition, it measures about 250'"'" in height, and 2<»> ' in 



circumf erence ; when it is contracted it measures 150""" 

 in height. and 230""" in circumf erence. The exterior 

 surfare of the body is furnished with longitudinal folds 

 upon which rather regular series of nodules are observed, 

 extending right from the oral disc to the hase (Pl. III, 

 fig. 3). These nodules are most compactly placed, and 



