134 



sees temmelig regelmæssigt anordnede, pæreformige, encellede 

 Slimkjertler, som med deres smale Udforselsgang munder 

 ud i Svælghulheden, Fig. 2, k. 1 Svælgrenden saaes yderst 

 sjeldent Slimkjertler hos de mange Arter, jeg har under- 

 søgt, men der fandtes dog enkelte. 



Paa den næsten papirtynde Basaldel ligge Spiklerne 

 tæt paa hverandre og optræde under Form af sammensatte 

 Stjerner og Dobbeltstjerner, hvilke ere de almindeligste, af 

 Spindler og Klubber, der ere sjeldnere, samt af Firlinger, 

 som ere yderst sjeldne. De sammensatte Stjerner have 

 takkede Straaleender ; stundom danner en Straale en liden 

 Stjerne for sig selv; de ere fra 0.132 — 0.140'"'" lange og 

 fra 0.05(3—0.076""" brede, Tab. XIX, Fig. 50. 51. Dobbelt- 

 stjernerne ere smaa, have et nøgent Midtbelte, ere fra 

 0.080—0.088""" lange og fra 0.040— 0.060""" brede iEnderne, 

 med et Midtbelte fra 0.020—0.032""" bredt. Fig. 52. 53. 54. 

 Spindlerne ere forskjellige, nogle smaa og kun lidet takkede. 

 0.080""" lange, 0.044""" brede. Fig. 55, andre ere stærkt 

 takkede og Takkerne brede, næsten som Blade ; de ere 

 0.160'"'" lange og 0.064""" brede, Fig. 56. Klubberne have 

 ligeledes bladformede, tandede Takker, ere fra 0.080 — 

 0.148*"'" lange og fra 0.056—0.076""" brede foroven, Fig. 

 57. 58. Firlingerne ere smaa, nærme sig Korsformen og 

 mere eller mindre besatte med Knuder; de ere fra 0.056 

 —0.084""" lange og fra 0.044— 0.072'"'" brede, Fig. 5'.'. 60. 61. 



Paa Polypeellerne ligge Spiklerne mere spredte i 

 Rækker; her er det især de sammensatte Stjerner og Dobbelt- 

 stjernerne, der ere de almindeligste. Spindler og Firlinger 

 ere ikke sjeldne. Af de sammensatte Stjerner ere enkelte 

 lidt krumme, men alle have meget brede, bladformede 

 Straaler med indskaarne Rande; de ere fra 0.116 — 0.184"'"' 

 lange og fra 0.060—0.092""" brede. Fig. 62. 63. Dobbelt- 

 stjernerne ere særdeles smukt ornamenterede ; hver Straale 

 ender i en liden Stjerne, ligesom der paa Midten, som 

 ellers pleier at være nogen, sees smaa Stjerner; de ere 

 fra 0.060—0.140""" lange, og fra 0.028—0.080""" brede i 

 Enderne; Midtpartiet er fra 0.028— 0.036""" bredt, Fig. 

 64. 65. Spindlerne ere ogsaa temmelig hyppige, men dog 

 ikke som de foregaaende, og takkede overalt, Takkerne 

 have Bladform og ere tandede i Randen ; enkelte Spindler 

 ere lidt tykkere i den ene Ende og nærme sig Kølleformen ; 

 de ere fra 0.056—0.192""" lange og fra 0.024—0.060""" 

 brede, Fig. 66. 67. 68. 69. Firlingerne ere de sjeldneste; 

 de have Roset- eller Stjerneform, ere smukt prydede med 

 Blade og Takker og 0.152""" lange, 0.112'"'" brede. Fig. 70. 



whilst, also, the ciliæ are both slenderer and shorter 

 (Pl. XX, fig. 2, ?'). Between those epithelial cells there 

 are seen, pretty regularly arranged, piriform, unicellular, 

 mucous glands, which open by their narrow excretory duct 

 into the gullet cavity (Pl. XX. Fig. 2, k). In the gullet- 

 passage of the niany species whicb I have examined, 

 mucous glands were extremelv rarely observed, but here, 

 however, a fe w were found. 



On the paper-like thin basal part, the spicules are 

 placed closely upon each other. and appear in the forms 

 of complex stellates and bistellates, which are the most 

 frequent; of fusees and clavates, which are less frequent; 

 and of quadruplets, which are extremelv rare. The com- 

 plex stellates have spiked radial extremities. and sometimes 

 a rav forms a small star for itself; they measure from 

 0.132—0.140""" in length, and from 0.056—0.076""" in 

 breadth (Pl. XIX, figs. 50 — 51). The bistellates are small, 

 and have a bare mesial stripe; they measure from 0.080— 

 0.088""" in length. and from 0.040—0.060""" in breadth at 

 the extremities. and have a mesial stripe measuring from 

 0.020—0.032"™ in breadth (Pl. XIX. figs. 52. 53. 54). 

 The fusees are variable, a few being small and only little 

 spicate; they measure 0.080""" in length, and 0.044""" in 

 breadth (Pl. XIX, figs". 55); others are strongly spicate, 

 the spikes being broad. almost like leaves; they measure 

 0.160*""' in length, and 0.064"" ' in breadth (Pl. XIX. fig. 56). 

 The clavates likewise, have, foliform, dentated spikes; 

 tlie\ measure 'from 0.080 — 0.148'"" 1 in length, and from 

 0.056—0.076*"*" in breadth above (Pl. XIX. fig. 57. 58). 

 The quadruplets are small, and approach in form to the 

 cruciforms; they are. more or less beset with nodules, and 

 measure from 0.056—0.084""" in length, and from 0.044— 

 0.072""» in breadth (Pl. XIX. figs. 59. 60. 61). 



In the polyp-cells, the spicules are placed more spread, 

 in series, and here, it is especially the complex stellates 

 and bistellates that are the most frequent forms, although 

 fusees and quadruplets are not rare. Of the complex 

 stellates. a few are a little curved but they all have very 

 broad foliform ravs with indented margins: they measure 

 from 0.116—0.184""" in length, and from 0.060— 0.092""" 

 in breadth (Pl XIX, figs. 62. 63). The bistellates are 

 particularly beautifully ornamented; each ray terminates in 

 a small star, whilst, also, in the middle, which otherwise 

 is usually bare, small stars are observed; these bistellates 

 measure from 0.060— 0.140""" in length. and from 0.028- 

 0.080""" in breadth at the extremities. and at the middle 

 part from 0.028— 0.036""" in breadth (Pl. XIX, figs. 64. 65). 

 The fusees are. also, pretty frequently met with, but not 

 so often. however. as the preceding forms; they are spi- 

 cate all over, the spikes being foliform and indented in 

 the margins ; a few fusees are a little thicker at the 

 one extremity than at the other, and approach in form 

 to the subclaviform ; they measure from 0.056 — 0.192'"*" in 

 length. and from 0.024—0.060""" in breadth (Pl. XIX 

 figs. 66. 67. 68. 69). The quadruplets are the rarest ; they 

 are rosetiform or stelliform. and ai-e richlv adorned with 



