100 



Paa Spiritusexemplarer antage Polyperne en mere 

 langstrakt Form og ere stærkt bøiede efter Bugen. 



Anatomisk-histologisk Undersøgelse. 



Stammen og Grenene ere beklædte med et Ectoderm, 

 der bestaar af flere Lag polyædriske Celler, Fig. 5, a, 

 indenfor hvilket der er et temmelig bredt, hyalint Binde- 

 vævslag, Fig. 5, b, imedens selve Coenenchymet er tyndt, 

 Fig. 5, c, hvorved Længdekanalerne blive forholdsvis meget 

 vide, Fig. 5, d. 



Paa Basaldelen ligge Spiklerne tæt pakkede paa hver- 

 andre, ere temmelig smaa, og de hyppigste Former, hvor- 

 under de optræde, ere sammensatte Stjerner og Klubber. 

 De sammensatte Stjerner variere noget, idet enkelte ere 

 mindre udviklede, medens andre have et nøgent Belte; de 

 ere fra 0.100—0.132'"'" lange og fra 0.048— 0.084""" brede; 

 det nøgne Belte er 0.039'"'" bredt, Fig. 6—9. Klubberne 

 ere enten stærkt takkede eller bladede og have et kort, 

 tildels takket Skaft; de ere fra 0.088—0.140""" lange og 

 fra 0.048-0.096™'" brede i den tykke Ende, Fig. 10—13, 

 Imellem de nævnte to Former sees hyppigt mere eller mindre 

 udviklede Dobbeltstjerner med et nøgent Midtbelte; de ere 

 fra 0.076—0.112'"'" lange og fra 0.032—0.060"™ brede, og 

 Midtbeltet er fra 0.012—0.020"»" bredt, Fig. 14—17; men 

 yderst sjeldent træffes en næsten korsformet Firling, 

 0.084'"'" lang, 0.092"™ bred, Fig. 18, samt en vortebesat, 

 bredendet, takket Spikel, nærmende sig noget Dobbeltstjernen, 

 0.132""" lang, 0.080""" bred i Enderne og 0.048'"'" paa Midten, 

 Fig. 19. 



Stammen er ikke i den Grad pakket med Spikier 

 som Basaldelen, men de ligge dog, især paa dens nederste 

 Del, tæt sammen. Det er fornemmelig Klubbeformen, som 

 er den fremtrædende, men den varierer temmelig meget. 

 Klubberne ere mere eller mindre stærkt bladede og have et 

 kjprt, dels nøgent, dels takket Skaft; de ere fra 0.100 — 

 0.160'"'" lange og fra 0.060—0.108""" brede i den tykke 

 Ende, Fig. 20 — 25. imellem Klubberne sees Dobbeltstjerner, 

 enkeltvis mere eller mindre udviklede, sammensatte Stjerner 

 med eller uden nøgent Midtbelte, enkelte smaa, takkede 

 Køller, samt nogle næsten kugierunde, bladede Rosetter. 

 Dobbeltstjernerne ere fra 0.076—0.084""" lange, fra 0.044— 

 0.048'"'" brede i Enderne og Midtbeltet fra 0.016—0.020'"'" 

 bredt, Fig. 26 — 28; de sammensatte Stjerner ere fra 0.112 

 — 0.148""» lange og fra 0.052—0.076'""' brede og Midtbeltet 

 fra 0.020—0.028""" bredt, Fig. 29—31. Køllerne ere 

 0.092"™ lange, 0.036'"'" brede foroven, Fig. 32. Rosetterne 

 ere stærkt indballere.de i Ectodermcellerne, fra hvilke det 



In specimens preserved in alcohol the polyps assume 

 a more elongate form, and are strongly curved along the 

 ventrum. 



Anatomo-histological examination. 



The stem and the branches are clad with an ectoderm, 

 consisting of several layers of polyhedrical cells (PL XIV, 

 fig. 5, a), inside of which there is a rather broad, hyaline 

 connective-tissue layer (PI. XIV, fig. 5, b), whilst the 

 sarcosoma, itself, is thin (PI. XIV, fig. 5, c) owing to which, 

 the longitudinal ducts become, relatively, very wide (PL XIV, 

 fig. 5, d). 



In the basal part, the spicules are situated closely 

 packed upon each other, and they are rather small. The 

 most frequent forms in which the spicules appear, are com- 

 plex stellates and clavates. The complex stellates differ 

 somewhat, inasmuch, that a few are imperfectly developed, 

 whilst others have a bare stripe. They measure from 

 0.100—0.132""" in length, and from 0.048—0.084"»" in 

 breadth. The bare stripe is 0.039""" broad (PL XIV, figs. 6—9) . 

 The clavates are, either, strongly spicate, or foliated, and 

 have a short, partly spicate, shaft; they measure from 0.088 

 —0.140""" in length, and from 0.048—0.096'"'" in breadth 

 at the thick extremity (PL XIV, figs. 10—13). Between 

 the two forms named, there are seen, frequently, more 

 or less developed bistellates with a bare mesial stripe ; 

 these measure from 0.076 — 0.112'™' in length, and 

 from 0.032 — 0.060""" in breadth, and the mesial belt mea- 

 sures from 0.012—0.020""" in breadth (PL XIV, figs. 14—17); 

 and, extremely rarely, an almost cruciform quadruplet is 

 met with, measuring 0.084'"'" in length, and 0.092""" in 

 breadth; (PL XIV, fig. 18) also a warty, spicate, spicule 

 with broad extremity, approaching in form somewhat to 

 the bistellate, and which measures 0.132""" in length, 0.080""" 

 in breadth at the extremities, and 0.048"™ in breadth at 

 the middle (PL XIV, fig. 19). 



The stem is not packed with spicules to the same 

 extent as the basal part, but they are situated, however, 

 especially upon its inferior part, close together. It is prin- 

 cipally the claviform which is here prominent, but it varies 

 very much. The clavates are, more or less strongly, 

 foliated, and have a short, sometimes bare, sometimes spi- 

 cate, shaft; they measure from 0.100 — 0.160'"'" in length, 

 and from 0.060—0.108""" in breadth at the thick extremity 

 (PL XIV, figs. 20 — 25). Between the clavates, bistellates 

 are seen; sometimes, more or less developed complex stel- 

 lates, with or Avithout a bare mesial stripe; a few, small, spicate 

 subclavates, also, a few, almost globular, foliated rosettes. The 

 bistellates measure from 0.076-^0.084""" in length, and from 

 0.044 — 0.048'"'" in breadth at the extremities, and their mesial 

 belt measures from 0.016—0.020'""' in breadth (PL XIV, fig. 

 26 — 28). The complex stellates measure from 0.112— 0.148""" 

 in length, and from 0.052 — 0.076""" in breadth, and have a 

 mesial stripe measuring trom 0.020— 0.028 7 ""' in breadth 



