69 



Nannodendron 1 elegans, n. g. et sp. 



Tab. VII, Fig. 45—47. Tab. VIII. 



Zoanthodemet er 35 fflm høit. Stammen er rund. haard, 

 læderagtig, furet efter Længden, omtrent 40 7 ™ i Omkreds 

 ved G-runden og aftager successivt lidt i Tykkelse op til 

 Toppen, hvor den deler sig i 3—4 Grene. Basaldelen er 

 tyk, fast, bred og skiveformigt udvidet. Stammen er fra 

 Grunden og til dens Ende rundtom tæt besat med Grene, 

 der ere af noget forskjellig Længde; de længste tindes 

 omtrent midt paa Stammen, ere indtil 1 b mm lange, 5 mm brede 

 ved deres Udspring og dobbelt saa brede henimod Enden; 

 de ere kolbeformige, Tab. VIII, Eig. 1. a, og fra Siden 

 udskyder dels en enkelt, dels indtil 3 Grene, der have 

 samme Eorm som Hovedgrenen og ere saa tæt indpressede 

 til denne, at de ligesom smelte sammen med den og give 

 sig kun tilkjende ved en fin Fure, Tab. VII, Eig. 45. 



Grenene, der ere haarde, stive, slutte sig næsten 

 taglagte til hverandre og saa tæt til Stammen, at denne 

 ganske skjules; de ere overalt, naar undtages i en Stræk- 

 ning af et Par Millimeter fra Udspringet, besatte med 

 Polyper, som staa meget tætte, knapt en halv Millimeter 

 fra hverandre, Tab. VII, Eig. 45. 46. Tab. VIII, Fig. 1. 



Polyperne ere retraktile, cylindriske, omtrent 5""" 

 lange med en temmelig kort Bagkrop, som er noget smalere 

 end Eorkroppen, idet den gaar over i Coenenchynicellen. 

 Hele Polypkroppen, der er 3 Mra lang, er -tæt besat med 

 Spikier, som paa Eorkroppen ligge pyramideformigt i 

 Længderækker, mellem hvilke sees ogsaa tætliggende 

 Spikier, Tab. VII, Fig. 47; paa den korte Bagkrop ligge 

 Spiklerne mere paaskraas. Tentakler ne ere omtrent 2 mm 

 lange og have paa deres aborale Side Spikier, der ligge 

 paaskraas i to Rækker. Fig. 47. Pinnulerne ere uden 

 Spikier. 



Paa hele Zoanthodemet iagttages ægformede JSTema- 

 tocyster uden Spiraltraad. 



Paa Stammen og Grenene sees runde, lidt ophøiede, 

 hvidgule Legemer med en rund Aabning i Midten, 



nules are devoid of any such. The Zoanthodem is, every- 

 where, closely beset with nematocysts. The colour light 

 chestnut-brown, with the pinnules intense dark-brown. 



1 V7.vvo; = en Dværg; §£%5pov = et Træ. 



Nannodendron 1 elegans, n. g. et sp. 



PI. VII, figs. 45—47, Pl. VIII, figs. 1—76. 



The Zoanthodem measures 35"™ in height. The 

 stem is cylindrical, hard, coriaceous, and longitudinally 

 grooved; it measures about 40"™ in circumference at the 

 base, and diminishes gradually in thickness up to the 

 summit, where it ramifies into 3 — 4 branches. The basal 

 part is thick, firm, broad, and discoidally dilated. The 

 stem, from the base up to its summit, is, round about it, 

 beset with branches, which are of somewhat variable 

 length; the longest ones are met with about the middle of 

 the stem, and these measure up to lh mm in length, and h mm 

 in breadth at their root, but are twice as broad towards 

 the extremity. They are clavate-formed (Pl. VIII. fig. 1. a). 

 and from the side there spring, partly, a single branch, 

 partly, up to 3 branches, which have the same form as 

 the parent branch and are so closely adpressed to if 

 that they, as it were, become absorbed into it and are 

 only recognisable by a minute groove (PI. VII, fig. 45). 



The branches, are hard, and stiff; they close almost 

 imbricately upon each other, and so closely to the stem that 

 it is almost concealed; they are, everywhere, except for a 

 distance of a couple of millimetres from the root, beset 

 with polyps, which are placed very close, scarcely half a 

 millimetre from each other (PI. VII. figs. 45. 46. PI. 

 YIII, fig. 1). 



The polyps are retractile, cylindrical, and measure 

 about 5""" in length; they have a rather short posterior 

 body, which is somewhat narrower than the anterior body 

 owing to its production into the sarcosoma-cell. The entire 

 body of the polyp, measuring 3 mm in length, is closely beset 

 with spicules that, upon the anterior body, are placed 

 pyramidically in longitudinal series, betAveen which are, 

 also, observed closely-set spicules (PI. VII, fig. 47). On 

 the short posterior body, the spicules are placed more 

 diagonally. The tentacles are about 2"' m in length, and 

 are furnished with spicules on their entire aboral side, 

 placed iu two diagonal series (PI. VII, fig. 47). The pin- 

 nules are devoid of spicules. 



On the entire Zoanthodem, ovate formed nematocysts, 

 without spiral filament, are observed. 



On the stem and the brandies, cylindrical, slightly 

 elevated, whitish-yellow corpuscles, are observed; these have 

 a circular aperture in the middle, zooids; they are placed 



1 -;cmo?. a dwarf; 5s\5pov, a tree. 



