60 



idet de bestaa af en cylindrisk Stilk og en skjoldformig 

 i en af smaa Grene bestaaende Skive udbredt Endedel, 

 paa hvilken dog hos Spiritusexemplarer kunde adskilles 3 

 forskjellige Partier, 1 mediant og terminalt og 2 laterale 

 nedad i hinanden overgaaende Partier (se Fig. 24 og 25). 

 Paa Grund af den stærkt udviklede marginale Hudbræm 

 paa Kroppen række Tentaklerne kun lidet eller slet ikke 

 udenfor samme, hvorfor de, naar Dyret sees ovenfra (Fig. 

 18), blive fordetmeste ganske skjulte. Anus (Fig. 22 s) 

 er beliggende paa den bageste Ende dorsalt eller et kort 

 Stykke ovenfor Kroppens bageste Rand. Den er, naar 

 den aabnes, cirkelrund med crenuleret Rand og er om- 

 given af 4 Par smaa coniske Ambulacralpapiller, hvoraf 

 de 2 forreste Par ere beliggende ligeoverfor hinanden tæt 

 foran, de 2 bageste tæt bag Analaabningen (se Fig. 22). 



Hele Kroppen er saavel paa Bug- som Rygsiden uni- 

 formt kjødrød farvet, snart lysere, snart mørkere, under- 

 tiden gaaende over i det brunlige, samt temmelig gjen- 

 nemsigtig, saa at de usædvanlig stærke Længdemuskler 

 skinne tydeligt igjennem ligesom ogsaa delvis den med 

 mørke contenta fyldte Tarmcanal, Tentaklerne ere lige- 

 ledes blegt kjødfarvede med noget stærkere (brunligt) far- 

 vet Endeskive. 



Kroppens Hud er efter den forskjellige Grad af Con- 

 traction mere eller mindre tyk, stærk og tendinøs. Tver- 

 musklerne ere af sædvanlig Beskaffenhed; derimod ere 

 Længdemusklerne, af hvilke de tre ligge paa Bugsiden, 

 de 2 øvrige paa Rygsiden meget stærke, brede og tykke 

 (stærkere som det synes end hos vore øvrige Holothurider), 

 især de 2 dorsale. Tarmcanalen forholder sig omtrent som 

 hos Arterne af Slægten Holothuria, f. Ex. tremula. Svælg- 

 ringen er derimod meget tyndere end hos denne sidste. 

 Der er 2 lange Poliske Blærer paa Ringcanalen, af hvilke 

 den ene maaske er Stencanalen. — Genitalrørene danne 2 

 Partier, et paa hver Side af Spiserøret; de ere meget tal- 

 rige, tynde, traaddannede og temmelig forgrenede. — 

 Respirationstræet er tvedelt, den høire længere Gren fæ- 

 stet til Kroppens Væg og strækkende sig frem næsten 

 til Svælgringen, den venstre kortere Gren fæstet til Tar- 

 men; begges Endeblærer ere temmelig smaa. 



KalUegemerne i Kroppens Hud ere meget talrige, men 

 langtfra ikke saa tætsiddende eller sammenhobede som 

 hos H. tremula. De have (Fig. 27—29) Form af et mere 

 eller mindre høit Taarn med flere Stokværk eller Etager, 

 men dette Taarns Basis er ikke udviklet til en Skive, 

 men har Form af et Kors, hvis 4 tynde Stave udvide sig 

 i Enden, som er rundagtig og gjennemboret af 1 — 3 re- 

 gelmæssigt stillede Huller. Hos et Individ var Korset 

 (Fig. 31) forholdsvis større, d. e. de 4 Stave større, og 

 hver af de udvidede Ender gjennemboret af 3 eller 5 

 Huller. Enkelte uudviklede Kalklegemer (Fig. 34) fore- 

 kom ikke sjeldent, hvilke vare meget smaa og kun bestaa- 

 ende af et simpelt Kors, hvor alle 4 Arme vare tilspid- 

 sede uden nogen Udvidning. Hos andre lidt større ere 



thuria; as they consist of a cylindrical stalk, and a scuti- 

 form extremity enlarged like a disc made up of small 

 branches, shewing however in spirit specimens 3 distinct 

 parts ; one medial and terminal, and 2 lateral parts going 

 over into each other below (see fig. 24 and 25). On 

 account of the strongly developed marginal rim of the 

 skin, the tentacles extend only a little or not at all bev- 

 ond it; and therefore when the animal is viewed from 

 above (fig. 18) they are for the most part entirely hidden 

 The Anus (fig. 22 s) is situated at the posterior extre- 

 mity, dorsally or a little above the posterior margin of 

 the body. It is, when open, circular with a crenulated 

 margin, and is surrounded by 4 pairs of small conical 

 ambulacral papillæ, of which the 2 anterior pairs are 

 situated opposite to each other close before, and the 2 

 posterior pairs close behind the anal aperture (see fig. 22) 

 The whole body, as well ventral side as dorsal is 

 uniformly of a flesh-red color, sometimes lighter some- 

 times darker, sometimes going over to a brownish color 

 and rather transparent; so that the extraordinarily strong 

 longitudinal muscles shine plainly through, as does also 

 partially the intestinal canal filled with dark contents. 

 The tentacles are likewise of a pale flesh-color with 

 somewhat more strongly colored (brownish) terminal discs. 

 The shin of the body is according to its different 

 degree of contraction more or less thick, strong and 

 tendinous. The transverse muscles are of the usual na- 

 ture; but the longitudinal muscles of which 3 are situated 

 on the ventral side, and the 2 others on the dorsal side, 

 are very strong broad and thick (stronger apparently 

 than in the other Holothurians) especially the dorsal 

 ones. The intestinal canal is nearly as in the species 

 of the genus Holothuria, for instance H. tremula. The 

 calcareous ring is however much thinner than in this 

 latter. There are 2 long ambulacral vesicles on the cir- 

 cular canal; one of them is perhaps the stone canal. 

 The genital tubes form 2 fascicles, one on each side of 

 the æsophagus; they are very numerous, thin filiform, 

 and rather ramified. The respiratory organ ("the kmg- 

 tree") is bipartite: the right longer branch attached to 

 the wall of the body and extending forwards nearly to 

 the æsophagal ring; the left shorter branch attached to 

 the intestine; both the terminal vesicles are rather small. 

 The calcareous corpuscles in the skin of the body are 

 very numerous, but not nearly so close- lying or so accu- 

 mulated as in the H. tremula. They have (üg. 27—29) 

 the shape of a more or less elevated tower with many 

 stories or stages; but the base of this tower is not de- 

 veloped to a disc, but has the form of a cross with 4 

 thin bars enlarged at the extremity which is roundish 

 and perforated with 1—3 regularly placed holes. In one 

 specimen the cross (fig. 31) was proportionally larger i. e. 

 the 4 bars were larger and each of the enlarged extre- 

 mities was perforated with 3 or 5 holes. Some undevel- 

 oped calcareous corpuscles (fig. 34) appeared not unfre- 

 quently; these were very small and consisted only of a 

 simple cross of which all the 4 arms were pointed without 



