Hele Legemet er paa sin ydre Flade beklædt med et 

 Epithel. der dannes af meget lange Cylinderceller, forsynede 

 med Kjærne og Kjærnelegeme, samt særdeles lange Cilier, 

 Tab. VIII, Fig. 4 a, 5 a. Imellem Oylindercellerne sees 

 indleirede overalt encellede Slimkjertler og Nematocyster 

 undtagen paa Fodskivens Underflade, hvor vel enkelte Slim- 

 kjertler iagttages, men ingen Nematocyster. Disse tindes 

 derimod i rigelig Mængde paa Mundskiven og Tentaklerne. 



Indenfor Ectodermet er et fibrillært. ikke meget bredt 

 Bindevævslag. Tab. VIII, Fig. 4 b. 5 b. Tab. IX. Fig. 



5 b. b' a; henimod dettes indre Flade er et bredt Belte af 

 cirkulære Muskler, som beklædes af cylinderformede Endo- 

 thelceller. Tab. VIII. Fig. 4c, be. Tab. IX. Fig. 5 c, 



6 /'. 7 d. De cirkulære Muskler dannes af stærke Fibril- 

 ler; men om disse danne Bundter eller simpelthen ordne 

 sig ved Siden af hinanden. er vanskeligt at afgjore. Paa 

 Tversnit ser det ud, som om det sidste er Tilfældet, Tal). 

 IX, Fig. 5 c, 7 d, imedens Længdesnit giver Billedet af, 

 at enkelte Fibriller lægge sig sammen til tynde Bundter, 

 Tab. VIII, Fig. 4 c, Tab. IX. Fig. 6 6. Disse endoder- 

 male. cirkulære Muskler ere stærkt udviklede, saa at de 

 ved at gjennemskjære Kropsvæggen viser sig for det blotte 

 Øie som en gul. smal Stribe, imedens det tilstodende Bin- 

 devæv er ganske hvidt. Denne gule Stribe bliver bredere 

 opimod Mundskiven, uden dog egentlig at rage ind i Gas- 

 tralhulheden. saaledes som Tilfældet er med Slægten Tealia, 

 Gosse, og som af Hertwig er fremhævet som et udpræget 

 Karaktermærke for den at ham opstillede ny Familie: 

 „Tealidæ«. 



De principale Septa ere (3 Par. hvoraf 2 Par udgjør 

 Retningssepta. Det ene Par af disse danner en bred 

 Spalte, da det ene Septum staar langt fra det andet. Paa 

 Retningssepta ere de transverselle Muskler, der danne en 

 tyk, foldet Lamel, fæstede til den indre Flade af hvert 

 Septum og vende altsaa mod hverandre, imedens de longi- 

 tudinelle Muskler, som danne tykke Buske, beklæde den 

 ydre Flade. Paa de ovrige 4 Septapar feste de longitudi- 

 nelle Muskler sig paa de indre Flader. vende altsaa mod 

 hverandre i det intraseptale Rum. De transverselle Musk- 

 ler beklæde de ydre Flader, der vende til de interseptale 

 Rum. Med Hensyn til de longitudinelle Muskler paa de 

 principale Septa, er det at bemærke, at de synes at ophøre 

 omtrent paa Midten, eller at aftage ganske betydeligt i Tyk- 

 kelse, saa at den inderste Halvdel, der fæster sig paa 

 Svælgroret. har en yderst ringe udviklet Muskulatur. De 

 secundære Septa udgjøre 18 Par og have et sta^rkt Muskel- 

 apparat. Hos dem ere de longitudinelle Muskler placerede 

 paa den indre Flade og vende saaledes mod hverandre i 

 de intraseptale Rum; de transverselle Muskler beklæde den 

 ydre Flade. De longitudinelle Muskler ere smukt busk- 

 formede og beklæde hele Fladen af Septum. dog saaledes, 

 at Buskene ere tykkere, rigere og staa tættere til hinanden 

 paa den Halvdel af Septum. der vender mod Gastralvæg- 

 gen end paa den indre, som vender til Svælgroret. 



The entire body is. upon its exterior surface. clad 

 with an epithelium formed of very long evlinder-cells fur- 

 nished with nuclei and nucleoli and, also, particularly long 

 eiliæ (Pl. VIII, figs. 4 a, 5 a). Between the cylinder- 

 cells. unicellular mucous glands and nemato-cysts are 

 seen to be everywhere entrenched, except on the under- 

 surface of the pedal disc, where indeed a few mucous 

 glands are observable but no nematocysts. Those last 

 are however found. in rich abundance, on the oral disc 

 and the tentacles. 



Inside of the ectoderm there is a tibrillar, not very 

 broad. connective-tissue laver (Pl. VIII, figs. 4 b. 5 b. 

 Pl. IX, figs. 5 b, 6 a). Towards its inner surface there 

 is a broad belt of circular muscles, which are clad with 

 cylindrica] endothelial cells (Pl. VIII, figs. 4 c, 5 c. Pl. IX, 

 figs. 5 c, b' b, 7 d). The circular muscles are formed of 

 strong fibrils, but whether these form fasciculi, or simply 

 arrange themselves adnately it is difficult to decide. In 

 transversal sections it appears as if the latter was the case 

 (Pl. IX. figs. 5 r. 7 (7). whilst longitudinal sections present 

 the appearance as it' some fibrils collect together into thin 

 fasiculi (Pl. VIII, fig. 4 c. Pl. IX, fig. 6 6). These endo- 

 dermal circular-muscles are strongly developed. so that 

 on transsection of the wall of the body. they show them- 

 selves. to the naked eve. as a yellow, narrow stripe, whilst 

 the adjacent connective-tissue is quite white. This yellow 

 stripe becomes broader up towards the oral disc, without, 

 however. extending into the gastric cavity, as is the case 

 with the genus Tealia, Gosse, and which trait is accentu- 

 ated by Hertwig as a distinct characteristic of tin- new 

 family, Tealidæ, proposed by him. 



There are (i pairs of principal septa. of which 2 pairs 

 compose the directive septa. The one of these pairs forms 

 a broad fissure, as the one septum stands far apart from 

 the other. On the directive septa. the transversal muscles. 

 which form a thick. folded lamella, are secured to the inner 

 surface of each septum, and face, therefore, towards each 

 other ; whilst the longitudinal muscles, which form thick 

 frutici. clothe the external surface. On the other 4 pairs 

 of septa the longitudinal muscles secure temselves to the 

 inner surfaces, and. therefore, face towards each other in 

 the intraseptal space. The transversal muscles clothe the 

 external surfaces which face to the interseptal spaces. 

 With regard to the longitudinal muscles on the principal 

 septa. it is to be remarked that they appear to terniinate 

 at about the middle, or become quite reduced in thickness, 

 so that the innermost 'half, which secures itself to the 

 tesophagus. has an extremely little developed musculosity. 

 The secondary septa consist of 18 pairs, and have a power- 

 ful muscular apparatus. In them, the longitudinal muscles 

 are placed on the inner surface, and face, thus, towards 

 each other in the intraseptal spaces. The transversal 

 muscles clothe the outer surface. The longitudinal muscles 

 are beautifully frutitorm, and clothe the entire surface of 

 the septum. but in such a manner that the frutici are 

 thicker, richer, and placed more compactly in to each other 



