135 



Paa Polypens Bagkrop træffes hyppigst sammensatte 

 Stjerner, mere eller mindre udviklede Dobbeltstjerner, samt 

 Spindler og Valser, sjeldnere Klubber og yderst sjeldent 

 Firlinger. De sammensatte Stjerner ere temmelig uregel- 

 mæssige og tildels forskjellige fra dem paa Polypcellen; 

 Straalerne ere ogsaa her brede og tandede; de ere 0.168"™ 

 lange, 0.052'""' brede, Tab. XX, Fig. 3. Dobbeltstjernerne 

 nærme sig tildels de sammensatte Stjerner, men adskille 

 sig dog ved det nøgne Midtparti ; Straalerne ere omtrent som 

 paa de sammensatte Stjerner, og selv paa de mindre ud- 

 viklede gjentager dette sig; de ere fra 0.088 — 0.100 mm lange 

 og fra 0.040— 0.052""" brede, med et 0.028"™ bredt Midt- 

 belte, Fig. 4. 5. 6. Spindlerne ere dels krumme, dels lige, 

 dels med tilspidsede, dels med afstumpede Ender og stærkt 

 takkede; Takkerne ere brede og tandede; de ere fra 0.076 

 — 0.320"»" lange og fra 0.028—0.076™'" brede, Fig. 7. 8. 

 9. 10. 11. 12. 13. Yalserne have tversafskaarne, takkede 

 Ender, overalt besatte med bladformede, tandede Takker 

 og ere 0.164"™ lange og 0.052""" brede, Fig. 14. Klubberne 

 ere rige paa bladformede, tandede Takker og have et yderst 

 kort Skaft; de ere fra 0.080—0.172"»" lange og fra 0.036 

 —0.080""" brede foroven, Fig. 15. 16. De faa Firlinger, 

 som findes, have Korsformen, ere smaa, men overalt for- 

 synede med bladformede Papiller; de have en Længde- 

 stok fra 0.056—0.080'"'" og en Tverstok, der er 0.068""", 

 Fig. 17 18. 



Paa Polypens Forkrop er Spindelformen den domine- 

 rende ; Dobbeltstjerner og Valser ere sjeldnere, men hyp- 

 pigere end disse er dog Køllerne, sjeldnest ere Firlinger. 

 Spindlerne ere snart krumme, snart lige, tæt besatte med 

 bladformede, tandede Takker, undertiden spaltede i den ene 

 Ende, der da altid er noget tykkere; de ere fra 0.108 — 

 0.396'""' lange og fra 0.028—0.056""" brede, Fig. 19. 20. 

 21. 22. 23. Dobbeltstjernerne have brede, takkede Straaler 

 og et nøgent Midtbelte; de ere 0.092""" lange, 0.044 mm 

 brede med et 0.020""" bredt Midtbelte, Fig, 24. Køllerne 

 have som oftest en tversafskaaren Ende og nærme sig der- 

 ved Tapformen; de ere stundom lidt krummede og mere 

 eller mindre tæt besatte med bladformede, tandede Takker ; 

 de ere fra 0.104—0.244""" lange og fra 0.028—0.060""" 

 brede foroven, Fig. 25. 26. Valserne ere her noget krum- 

 mede, forresten lig dem paa Bagkroppen, men noget mindre ; 

 de ere 0.112""" lange, 0.044""" brede, Fig. 27. Firlingerne 

 ere korsformede og forskjellige baacle indbyrcles og fra de 

 tidligere omtalte ; den ene Form er tæt besat med Papiller 

 og har en Tverstok, hvoraf den ene Arm er Helen og til- 

 spidset, den anden bred og tversafskaaren for Enden ; 

 Længdestokken er 0.204'"'", Tverstokken 0.128""", Fig. 28; 

 den anden Form er noget mere regelmæssig ; men ogsaa 

 her er. Tverstokken paa den ene Arm bredere end paa 

 den anden ; hele Korset er prydet med tætstaaende, blad- 



leaves and spikes; they measure 0.152"™ in length, and 

 0.112'"'" in breadth (Pl. XIX. fig. 70). 



On the posterior body of the polyp, complex stellates 

 are most frequently met with, and, also, more or less 

 developed bistellates, as well as fusees and cylinders ; more 

 rarely clavates; and quadruplets extremely rarely. The 

 complex stellates are pretty irregular, and are, to a certain 

 extent, different from those of the polyp-cell ; the rays are, 

 here, broad and dentated; these complex stellates measure 

 0.168""" in length, and 0.052"™ in breadth (PL XX, fig. 3). 

 The bistellates approach in form, in a measure, to the 

 complex stellates, but are distinguished however by their 

 bare middle part; the rays are nearly similar to those of 

 the complex stellates; even on the imperfectly developed 

 ones this is, also, the case; they measure from 0.088 — 

 0.100""" in length, and from 0.040—0.052"™ in breadth, 

 and have a middle stripe measuring 0.028'"" 1 in breadth 

 (PL XX, figs. 4. 5. 6). The fusees are, sometimes curved, 

 sometimes straight, and sometimes they have acuminate, 

 sometimes blunt extremities ; they are strongly spicate, the 

 spikes being broad and dentated; they measure from 0.076 

 —0.320™'" in length, and from 0.028—0.076'""" in breadth 

 (PL XX, figs. 7. 8. 9. 10. 11. 12. 13). The cylinders have 

 truncate, spicate, extremities beset, everywhere, with foli- 

 form, dentated, spikes; they measure 0.164""" in length, 

 and 0.052""" in breadth (PL XX, fig. 14). The clavates 

 are rich in foliform, dentated, spikes, and have an ex- 

 tremely short shaft; they measure from 0.080 — 0.172""" in 

 length, and from 0.036—0.080""" in breadth above (PL XX, 

 figs. 15. 16). The few quadruplets that are found have 

 the cruciform, but are small, and furnished, everywhere, 

 with foliform papillae ; they have a longitudinal arm mea- 

 suring from 0.056 — 0.080""", and a transversal arm mea- 

 suring 0.068"»" (PL XX, figs. 17. 18). 



On the anterior body of the polyps, the fusiform is 

 the most predominant form, bistellates and cylinders are 

 rarer, subclavates are more frequent than them, but 

 quadruplets are more rare. The fusees are, sometimes 

 curved, sometimes straight, and are closely beset with 

 foliform, dentated, spikes occasionally fissured in the one 

 extremity, which, then, is always somewhat thicker; they 

 measure from 0.108 — 0.396""" in length, and from 0.028— 

 0.056""" in breadth (PL XX, figs. 19. 20. 21. 22. 23). The 

 bistellates have broad spicate rays and a bare mesial stripe ; 

 they measure 0.092"™ in length, 0.044"™ in breadth, and 

 have a middle stripe 0.020""" in breadth (PL XX, fig. 24). 

 The subclavates have, most frequently, a truncated extre- 

 mity, and approach somewhat, from that cause, to the 

 coniform ; they are sometimes a little curved, and are, more 

 or less closely beset with foliform, dentated,^ spikes; they 

 measure from 0.104— 0.244"™ in length, and from 0.028 — 

 0.060""" in breadth above (PL XX, figs. 25. 26). The 

 cylinders are, here, somewhat curved, but they are, other- 

 wise, like those on the posterior body, only somewhat smaller; 

 they measure 0.112"™ in length, and 0.044"™ in breadth 

 (PL XX, fig. 27). The quadruplets are cruciform, and 

 differ, both, amongst themselves, and from those pre- 



