132 



Svælgrøret dann§r en lidt fladtrykt Cylinder, som 

 udvendigt er forsynet med Endothelbeklædning, indenfor 

 hvilken er et Muskellag, der er Fortsættelse at' Musklerne 

 paa de fuldstændige Septa. og som er fæstet til et Binde- 

 vævslag, Tal). XXIV, Fig. 8 e, der tiltager betydeligt i 

 Bredde mod Bugsiden. Tab. XXIV. Fig. 8 /, netop der. 

 hvor de to fuldstændige Retningssepta fæste sig. Den 

 indre Flade frembyder en udpræget Svælggrube, Tab. XXIV. 

 Fig. 8 g, som er forsynet med hoie. smale Cylinderceller, 

 der bære lange Cilier; den øvrige Del af den indre Svælg- 

 væg er foldet og beklædt med meget hivere Cylinderceller, 

 Tab. XXIV, Fig. 8 h. som have korte Cilier. og imellem 

 hvilke der sees en stor Mængde encellede, kolbeformede 

 Slim kjertler. 



Tentaklerne ere paa sin ydre Væg beklædte med et 

 Epithel, sum bestaar af hoie. smale, cijierende Cylinder- 

 celler. imellem hvilke der er en stm- Mængde Nemato- 

 cyster. Indenfor Ectodermet er et Lag stærke Længde- 

 muskler, som ere fæstede til Bindevævet, der er temmelig 

 bredt, forsynet med Bindevævslegemer og Ernæringskanaler, 

 tig paa hvis indre Flade cirkulære Muskler inserere sig. 

 Disse ere beklædte med et Endothel, dannet af temmelig 

 hoie. smale, eilierende Cylinderceller, som rage langt iml i 

 Tentakelhulheden. 



The æsophagus forms a slightly flattened cylinder 

 that is furnished externally with a covering of endothelium, 

 on the inside of which there is a muscular laver, a con- 

 tinuation of the muscles of the perfect septa. and its mus- 

 cles are attached to a layer of conneetive-tissue (Pl. XXIV, 

 tig. 8 e) that increases considerably in breadth towards 

 the ventral side (Pl. XXIV. tig. 8 f), just at the point 

 where the two perfect directive septa attach themselves. 

 The inner surfare presents a distinguished gullet-groove 

 (Pl. XXIV. hg. 8 g) furnished with high narrow cylinder- 

 cells carrying long ciliæ; the remainder of the gullet- 

 wall is folded, and is clad with rauch lower cylinder-cells 

 (Pl. XXIV. hg. S ln with short ciliæ, between which 

 a great multitude ol unicellular, claviform mucous glands 

 are observed. 



The tentacles are, upon their external wall, clad with 

 an epithelium that consists of high. narrow, ciliating cylinder- 

 cells, between whieh there is a great abundance of nema- 

 tocysts. On the inside of the ectoderm there is a layer 

 of strong longitudinal muscles. whieh are attached to the 

 conneetive-tissue; the latter is pretty hroad and furnished 

 with conneetive-tissue corpuscles and nutritory ducts, and 

 circular muscles insert themselves on its inner surface. These 

 are clad with an endothelium formed of rather high, narrow, 

 ciliating cylinder-cells that project far into the tentacular 

 cavity. 



Findested. 



Station 104. Mange Exemplarer. 

 — 2* JO. Xogle faa Exemplarer. 



Habitat. 



Station No. 1(>4. Many specimens. 

 200. A few specimens. 



Artskarakter. 



Coenenchymet ikke meget udbredt, dels bestet paa 

 Stene, dels omspundet tynde Gjenstande, saasom Tubularie- 

 rør. Polyperne i Regelen isolerede, cylindriske, lidt ind- 

 knebne paa Midten. Kolumnen inkrusteret med Sand. er 

 20""" hoi. b""" bred ved Grunden, 6—7""" bred ved den 

 øverste Ende og 4""" paa Midten. Opimod dens øverste 

 Raud 18 inkrusterede Ribber, imellem hvilke ligesaa mange 

 nøgne Felter. Mundskiven næsten flad, foldet. Folderne 

 udgaa fra den lidt arlange Mund til Peripherien. Tentak- 

 lerne sidde i 3 Rækker, ere temmelig lange, tykke ved 

 Grunden. men ende konisk tilspidsede. 1 den yderste 

 Række er der 18. i den mellémste 12, i begge disse Rækker 

 ere Tentaklerne lige lange, men den inderste, 3die Række 

 har kun li. der ere de længste og tykkeste, aæsten ligesaa 

 lange som Mundskivens Bredde. Farven: Den inkrusterede 

 Kropsdel er gulgrønlig; aaar Dyret er udstrakt er den 

 næsten gul, kun ved Grunden spillende noget i det Grønne. 

 Mundskiven svag tegelstensrød med mørkere Mundrand og 

 Folder. Tentaklerne ere intensere rode end Mundskiven. 

 men i Enderne noget blegere. 



Specifle characteristics. 



The sarcosoma not widely distributed, sometimes at- 

 tached to stones sometimes twined round other objects 

 such as tubes of Tubularia. The polyps placed singly, as 

 a rule. cylindrical, slightly constricted at the middle. The 

 column encrusted with sand. measures 20""" in height, 6""" 

 in breadth at the base. G — 7"'" in breadth at the upper- 

 most extreraity, and 4'""' at the middle. Up towards the 

 uppermost margin there are 18 encrusted ribs, between 

 which there are the same number of bare areas. The 

 oral disc ahnost Hat. folded. The folds issue from 

 the slightly oblong mal aperture to the periphery. The 

 tentacles are placed in 3 series, are rather long, thick at 

 the base, but terminate conically acuminated. In the 

 outermost series there are 18 tentacles. in the intermediate 

 series 12; in both of those series the tentacles are uniform 

 in length, but the innermost, the third series, contains 

 only li tentacles. and they are the longest and thickest, 

 being almost as long as the oral dise is broad. Tlie 

 coloxw. The encrusted portion of the body greenish- 

 yellow, but when the animal is extended it is alnios L yellow 

 with a slightly greenish play of colour at the base only. 

 The oral disc is faint brick-red with a darker margin 



