115 



I Kanslernes Skillevægge er der Længderækker ai' 

 Spikler, som ere i størst Mængde tilstede, der hvor Skille- 

 væggen tager sit Udspring fra den indre Væg af Binde- 

 vævet; men ogsaa paa Midten ai' Skillevæggen sees smaa. 

 spredte Spikler. Polyperne ere paa deres ydre Flade be- 

 klædte med etEpithel, som bestaaraf2 — 3 Lag polyædriske 

 feller. Fig. 6, a. lig dem. som tindes paa Stammen og 

 < i lenene, og imellem disse (Adler iagttages encellede Slim- 

 kjertler, der dog ere temmelig sparsomme. Indenfor Ecto- 

 dermet er et hyalint Bindevævslag med sine Bindevævs- 

 legemer samt Nutritionskanaler, og fra hvis indre Væg ud- 

 gaa de sædvanlige 8 Septa. der fæste sig paa Svælgets 

 ydre Væg, Fig. 7. a. 1 Ectodermet og det ydre Lag af 

 Bindevævet ere Spiklerne leirede. Fig. 6. b\ i Septa er 

 ingen saadanne. 



Svælget er næsten cylindrisk : dets ydre Flade er 

 beklædt med Epitbel, dannet af et Lag runde Celler med 

 en rund Kjerne og Kjernelegeme, Fig. 6, c: fuldkommen 

 lig disse ('eller, der ogsaa beklæde Kamrene, sees andre 

 Celler, liggende isolerede indeni Kamrene, og som synes at 

 tilhøre den Ernæringssaft, der gjennemstrømmer Kanalerne, 

 Fig. (i. (/. Jeg har næsten bestandig iagttaget, at den 

 Vædske, som rindes i Kamrene og i de store Kanaler, 

 indeholder Celler, der have saa særdeles meget tilfælles 

 med de Endothelceller. som beklæde dem. at de synes at 

 være et Produkt af dem. med andre Ord. at Saftcellerne 

 dannes af Endothelet. Indenfor Epithelet er et hyalint 

 Bindevævslag, som paa Bugsiden danner tiere listeformige 

 Fremspring, der rage ind i Svælgkulheden, Fig. 6. e. 7. h\ 

 saa vel disse, som den ø.vrige Del af Bindevævets indre 

 Flade. er beklædt med Epitbel. der er Svælgets Epitbel og 

 som bestaar af et Lag lange, cylindriske Celler, forsynede 

 med Cilier. Fig. 7. c. Langs Svælgets Bagside er Svælg- 

 renden. der her har flere Fremspring eller Folder, som 

 rage temmelig langt ind i Hulheden. og der, hvor Svælg- 

 gruben til Siderne ophorer, er en Indsnøring, der ligesom 

 deler Svælget i to Længdehulheder. Fig. 7. d; den ene, 

 som følger Bugsiden, er Svælggruben med sine store Folder. 

 Fig. 7. e, og den anden, som følger Rygsiden, er uden 

 synderlige Folder og kan, naar Svælgrenden er lukket, be- 

 tragtes som Tarm. Fig. 7. /. Svælgrenden (har meget 

 lange Cylinderceller, der hver er forsynet med en lang 

 Pidsk, Fig. <>./. fuldkommen lig dem. som tidligere have været 

 beskrevne. 



Det synes ikke at være tvivlsomt. at Svælggruben her 

 virker som virkelig Øsophagus og lukker sig. saasnart den 

 har fort ind i Maven de til Ernæringen nødvendige Føde- 

 midler, imedens den anden Del af Svælget, Rygpartiet, 



found in the inne)- cellular laver of the epithelium. AVhere 

 spicules are present in the connective-tissue, there is always 

 a depressiou of the cells of the ectoderm, so that these sur- 

 round them. 



In the divisional waUs of the ducts, there are longi- 

 tudinal series of spicules, which are present in greatesl 

 number at the point where the divisional walls issue irom 

 the inner wall of the connective-tissue. but scattered spi- 

 cules are. also. observed in the middle of the divisional 

 wall. The polyps are, upon their exterior surface, clad 

 with an epithelium which consists of 2 — 3 layers of poly- 

 hedrical cells (fig. (3, a) similar to those found on the 

 stein and the branches, and. between these cells. unicellular 

 mucous glands are observed. which however are rather 

 rare; inside of the ectoderm. there is a laver of hyaline 

 connective-tissue. with its connective-tissue corpuscles and 

 nutritory ducts. from whose inner wall the usual 8 septa 

 issue and attach themselves to the external wall of the 

 gullet (fig. 7, a). The spicules are embedded (fig. 6, 6) 

 in the ectoderm and the outer layer of connective-tissue. 

 There are no spicules in the septa. 



The gullet is almost cylindrical : its outer surface is 

 clad with epithelium. formed of a layer of cylinder-cells 

 containing a round nucleus and nucleolus (fig. 6, c); other 

 cells. exactly similar to those cells which. also. clothe the 

 chambers, are seen. placed isolatedly, within the chambers, 

 and these appear to pertain to the nutritory fluid that flows 

 through the ducts (fig. 6, il). I have. almost invariably, 

 observed that the fluid which is found in the chambers. and in 

 the large ducts. contains cells which have such very particular 

 ■resemblance to the endothelial cells that clothe the ducts. 

 that they appear to he a product of them — in other words. 

 that the cells of the fluid are formed from the endothelium. 

 Inside of the epithelium. there is a hyaline connective- 

 tissue layer which. on the ventral side. forms several fillet- 

 ibrined prommences that project into the gullet-cavity : 

 itig. 6, e, 7. ln both, these. as well as the remaining part 

 of the inner surface of the connective tissue. are clad with 

 an epithelium. which is the epithelium of the gullet, and 

 consists of a laver of long, cylindrical cells, furnished with 

 ciliæ (flg. 7. r). The gullet-passage appears along the 

 ventral side of. the gullet, and has, here, several prominen- 

 ces. or folds, which extend pretty far into the cavity. and 

 at the point where the gullet-cavity. at the sides, ceases. 

 there is a constriction which, as it were. divides the gullet 

 into two longitudinal cavities (fig. 7. (/i — the one. of these, 

 which runs along the ventral side is the gullet-cavity with 

 its large folds ('fig. 7. e), and the other. which runs along 

 the dorsal side. has no particular folds, and may, when the 

 gullet-passage is closed. he considered as an intestine 

 (fig. 7. /'). The gullet-passage has very long cylinder-cells. 

 each of which is furnished with a long flagellum (fig. (i. f) 

 exactly like those which have been previously described. 



It does not appear to be doubtful, that the gullet 

 cavity. here. operates as a genuine osophagus. and closes 

 itself as soon as it has passee! the necessary nourishment 

 into the stomach, whilst the other division of the gullet — 



15* 



