64 



skiven bred. skiveformigt udvidet med en tynd. uregel- 

 mæssig Rand. Fodskivens Overflade og to Trediedele af 

 Kolumnen heklædt med en grovt inkrusteret, membranøs 

 Skede. Den inkrusterede Del aftager i Tykkelse opad mod 

 Skedens skarpe Rand. Den øverste Trediedel cylindrisk. 

 nogen. glat. lidt smalere end Skedens Rand. forsynet med 

 Længdefolder og Furer. Paa Folderne smaa. runde, tæt- 

 staaende Sugevorter. imellem disse enkelte Cinclides. Mund- 

 skiven plan. Munden ah* ang med tykke, foldede Læber. 

 Tentaklerne omtrent saa lange som Mundskivens Bredde, 

 staa i 2 afvexlende Rækker. 12 i hver, retraktile; den 

 yderste Række staar lige i Kropsranden. Hele den øverste, 

 nøgne Del trækkes ganske ind i Skeden. Skrabes Skeden 

 væk, sees Kropsfladen tæt besat med Sugevorter. Farven: 

 Den inkrusterede Del graabrun ; den nøgne Del af Krop- 

 pen næsten hvid. Tentaklerne i den yderste Række violet- 

 røde, intensere ved Grunden ; de i den inderste Ra-kke ere 

 mere rosenrøde. Mundskiven violetrød, straalet. med violet- 

 rode Striber. De foldede Mundlæber intens violetrøde. 

 Kropshuden indenfor Skeden ganske hvid. Vorterne 

 skinne lidt i det Gule. Cirkulærmusklerne mesodermale. 

 12 Septapar. hvoraf (> fuldstændige. 



Phellia bathybia. n. sp. 



Tab. IY. Fig. 1—4: Tal). XIII. Fig. 7—9. 



Dyrets hele Høide er omkring 45""". Fodskiven rund. 

 tyk, lidt bredere end Kolumnens nederste Del. men smalere 

 end dennes øverste Rand. Tab. IV, Fig. 1. 2. Den undre 

 Flade er lidt konkav og foldet fra Centrum mod Periphe- 

 rien; den ovre Flade er hvælvet og inkrusteret. 



Kolumnen er cylindrisk, dens nederste tre Fjerdedele 

 har en membranøs Skede. hvori er indleiret plastisk Bilo- 

 culinler. og hvis øverste Rand er skarpt afgrændset, Tab. 

 IV. Fig. 4 ; Tab. XIII. Fig. 7 a. Kroppens øverste Fjerde- 

 del er nøgen og udvider sig fra Skedens Rand urneformigt 

 op imod Mundskiven; den har mange Længdefolder. Tab. 

 IV, Fig. 4, imellem hvilke sees fine Furer, der antyde 

 Septainsertionerne; paa hver Fold sees en Længderække 

 af temmelig store, tætstaaende Sugevorter, Tab. XIII, 

 Fig. 7 b. 



Mundskiven er bred med en atlang Mund. hvorfra 

 udgaa mange Folder mod Peripherien, Tab. XIII. Fig. 7. 

 Tentaklerne sidde afvexlende i 2 Rækker, 18 i hver. ere 

 retraktile og indtage Kroppens øverste Rand. I den 

 inderste Række ere de meget korte og afstumpede, imedens 

 de i den ydre Række ere overordentlig lange, ja næsten 



upwards. The pedal disc broad. discoidally expanded. has 

 a thin irregular margin. The external surface of the 

 pedal disc and two-third parts of the column. clad with 

 a coarse. encrusted membranous sheath. The encrusted 

 portion diminishes in thickness upwards towards the sharp 

 margin of the sheath. The uppermost third part cylindric, 

 bare, smooth. slightly narrower than the margin of the 

 sheath. furnished with longitudinal folds and furrows. Upou 

 the folds, small, round. compactly placed suckers; between 

 these a few cinclides. The oral disc plane. The mouth 

 oblong. with thick folded labiæ. The tentacles about the 

 same length as the breadth of the oral disc, placed in 2 

 alternating series, 12 in each. retractile; the outermost 

 series placed just at the margin of the body. The entire 

 uppermost. bare part. can be quite withdrawn into the 

 sheath. When the sheath is seraped away the surface of 

 the body is seen to be closely covered with suckers. The 

 colour. The encrusted portion grey-brown; the bare part 

 of the body ahnost white. The tentacles in the outermost 

 series violet-red, and more intense in colour at the base; 

 the tentacles in the innermost series are more rose-red in 

 colour. The oral disc violet-red. radiated with violet-red 

 stripes. The folded oral labiæ, intense violet-red. The 

 integument of the body. inside the sheath, quite white. 

 The suckers have a slight yellow lustre. The circular 

 muscles are mesodermal. 12 pairs of septa. of which 6 

 pairs perfect. 



Phellia bathybia. n sp. 



Pl. IV, fig. 1—4: Pl. XIII. fig. 7— <>. 



The entire height of the animal is about 45'""'. The 

 pedal disc is round, [thick, slightly broader than the lowesl 

 part of the column. but narrower than its uppermost margin 

 (Pl. IV. fig. 1, 2). The inferior surface is slightly con- 

 cave, and folded from the centre towards the periphery ; 

 the upper surface is arcuate and encrusted. 



The column is cylindric; its lowest three-fourths part 

 has a membranous sheath in which plastic biloeulina-clay 

 sits embedded, and whose uppermost margin in sharply 

 defined (Pl. IV, fig. 4; Pl. XIII, fig. 7 a). The upper- 

 most fourth part of the body is bare. and expands from 

 the margin of the sheath in urn-shape, up towards the 

 oral disc; it has numerous longitudinal folds (Pl. IV, fig. 4) 

 between which fine furrows that indicate the insertions 

 of septa are seen. and upon each fold there is a longi- 

 tudinal series of pretty large, highly protuberant suckers 

 (Pl. XIII. fig. 7 b). 



The oral disc is broad. with an oblong mouth from 

 which numerous folds issue towards the periphery (Pl. XIII. 

 fig. 7). The tentacles are seated alternatingly in 2 series, 

 18 in each ; they are retractile and occupy the uppermost 

 margin of the body. In the innermost series they are 

 very short and blunted, whilst in the outer series they 



