110 



rige paa Spilder. Septa spikelholdige. 

 med Spikelrækker. 



Artskarakter. 



Svæleet forsynet 



indtil 70""" hoit. Stammen rund. 



Basaldelen fast, membranagtig udvidet. dannende 



Zoanthodemet 

 grenet. 



ofte et Ror. udfvldt med Grus, og fra hvilket stundom 

 Stoloner udgaa. Grenene sidde i Regelen paa Stammens 

 to overste Trediedele, staa langt fra hverandre, bære til- 

 dels enkelte Polyper og dele sig i flere Smaagrene, der 

 hver bære flere Polyper. sammenvoxede ved Grunden. 

 Polvperne retraktile, cylindriske med en lang Forkrop og 

 rige paa store, takkede, spindelformede Spikler. Tentaklerne 

 ere paa deres aborale Side ligesom Pinnulerne forsynede 

 med Spikler. Basaldelen pakket med Spikler, hvor Dobbelt- 

 stjernen og den sammensatte Stjerne er den hyppigste Form. 

 Stammen og Grenene spikelrige. hvor de samme Former ere 

 almindeligst. I Stammens og Grenenes Coenenchym for- 

 skjelligt formede Spikler. af hvilke Firlinger ere hyppigst. 

 I Septa Spilder, og paa Svælget 6 Dobbeltrækker og 2 Enkelt- 

 rækker Spikler. Farven gul, spillende noget i det Brune. 



Barathrobius palmatus. n. sp. 



Tab. XVI. Fig. -li'— 94. 



Zoanthodemet er busket, indtil 25 mm hint. Stammen 

 er rund. furet paalangs. lidt tykkere ved Grunden end i 

 overste Ende. rigt besat med Grene ligefra Basaldelen og 

 op til Toppen, der optages af 3 — 4 Polypgrupper. Basal- 

 delen er fast. tynd. membranagtig og skiveformigt udvidet. 

 Fig. 42. Grenene ere korte, tykke og i Regelen tykkere 

 i Enden end ved deres Udspring, Fig. 42. 43. De staa 

 tæt sammen, ere udelte og bære paa deres Ende enten 

 enkeltvis 5 — 7 Polyper. Fig. 43. eller flere Polypgrupper 

 med 3—4 Polyper i hver. Fig. 42. Ikke saa sjeldent ud- 

 springe midt paa Grenen en enkelt Polyp. og hist og her 

 fra Stammen, ja endogsaa fra selve Basaldelen. sees en 

 enkelt Polyp at tåge sit Udspring, Fig. 42. 



Polvperne ere retraktile. cylindriske. omkring 10""" 

 lange med en 4""" lang Forkrop. der ei- forsynet meil 8 

 Længderibber, som gaa over paa Tentaklernes aborale 

 Side. Bagkroppen er omtrent 3""" lang. og her ligge 

 Spiklerne paatvers. Tentaklerne ere mellem 3—4""" lange 



the branches. and also their sarcosoma. rich in spicules. 

 The septa contain spicules. The gullet furnished with 

 spicular series. 



Speeific charaeteristics. 



The Zoanthodem measures up to 70'""' in height. 

 The stem cylindrical, ramous. The basal part hard. mem- 

 branaceously dilated, often forming a tube stuffed with 

 coarse sand. and from which stolons sometimes proceed. 

 The branches. as a rule, situated on the uppermost two- 

 third parts of the stem. placed far apart from each other, 

 carry. partly, a few polyps, ramify into several branchlets, 

 each of which carries several polyps concreted together at 

 the base. The polyps retractile, cylindrical, with a long 

 anterior body, and rich in large spicate fusiform spicules. 

 The tentacles. on their aboral side. as also the pinnules, 

 are furnished with spicules. The basal part packed with 

 spicules. of which the bistellate. and the complex stellate 

 are the most frequent forms. The stem and the branches 

 rich in spicules. and here also the same forms are the 

 most common ones. In the sarcosoma of the stem and the 

 branches. variously formed spicules. of which quadruplets 

 are most frequent. In the septa spicules. and on the 

 gullet. 6 double series and 2 single series of spicules. The 

 colour yellow. shading somewhat to brown. 



Barathrobius palmatus. n. sp. 



Pl. XVT. dgs. 42—94. 



The Zoanthodem is fruticose, and measures up to 2.') 

 in height. The stem is cylindrical, furrowed lougitudinally. 

 and soniewhat thicker at the base tlian at the superior 

 extremity; it is richly beset with branches. quite from its 

 basal part up to the summit. which is occupied by 3 — 4 

 groups of polyps. The basal part is hard, thin. and 

 membranaceous, and it is discoidally dilated (rig. 42). The 

 branches are short and thick. and are. usuallv. thicker at 

 their extremity tlian at their root (figs. 42. 43). They are 

 placed closely together. are non-ramous. and on their extre- 

 mities they carry. either. 5 — 7 isolated polyps (fig. 43). or 

 several groups of polyps. with 3 — 4 polyps in each group 

 (fig. 42). Xot infrequently, a single polyp springs from 

 the middle of the branch. and. here and there. from the 

 stem, even from the basal part itself. a single polyp is 

 seen to spring (fig. 42). 



The polyps are cylindrical and retractile; they mea- 



sure about lo ' in length. They have an anterior body 



4""" long. furnished with 8 longitudinal ribs which pass 

 over into the aboral side of the tentacles. The posterior 

 body is about 3""" long. and the spicules are. here, placed 



