ul 





19 



déflexa i Floridan Bryozoa, og jeg maa antage, at det 

 virkelig er denne art, som har foreligget. Enhver, som 

 har beskjæftiget sig noget med cyclostomate polyzoer, ved 

 hvilke store vanskeligheder ofte er forbundet med at iden- 

 tificere dem, og man tør neppe stole sikkert paa, at den 

 arktiske fauna omfatter baade entalophora deflexa og clavata 

 samt desuden stomatopora deflexa. Couch. 



Det, som især synes at karakterisere entalophora de- 

 flexa, er den betydelige længde af zoociernes frie del, jeg 

 har nemlig fundet den af være 0.84 — 0.96 mm., stundom 

 endog J .2 mm. Længden er nemlig ogsaa underkastet be- 

 tydelig variation. Zoociernes tykkelse i den frie del fandtes 

 at variere mellem 0i4 — 0.18 mm. 



Oocier har jeg ikke fundet, men Smitt har tegnet dem 

 som en opsvulmning under bifurcation en. 



Gen. Reticulipora. 

 Reticulipora intricaria, Smitt. 



Tab. I, fio\ 12. 



P- 



1117, tab. 20, 



Retiadipora intricaria, Smitt (24, V 



fig. 1—3. 

 Diastopora intricaria, Levinsen (15), p. 21. 

 Ueticidipora intricaria, Norclgaard (18, II), p. 5. 



Findesteder. St 48. 290, 315. 



Af de her opførte Stationer ligger 48 i øst for Island, 

 290 og 315 mellem Norge og Spitsbergen. Paa dette strøg 

 er arten tågen engang før, nemlig af den svenske Spits- 

 bergexpedition (Smitt). Lindahl har tåget den i Baffms 

 Bay, og Dijmphnaexpeditionen i Karahavet (Levinsen). 

 Endelig har jeg fundet den ved Sværholt i Finmarken. 



Smitt (1. c.) har tydelig fremhævet slægtskabet med 

 diastopora specielt obelia ved tilstedeværelsen af smaarør, 

 tilslutning af de ældre zoocier ved en kalklamel, o. s. v. 

 Denne kalklamel (operculum) er ogsaa her perforere!. De 

 kolonier jeg havde til unclersøgelse, afgav nok et vidnesbyrd 

 om nært slægtskab med diastopora, idet der i grenenes 

 kant forekom et listeagtigt fremspring svarende til basal- 

 skivens udvidelse hos diastopora (the marginal extension of 

 the basal lamina). 



Længden af den frie del af zoocierne ved 0.4 — 0.6 mm. 

 og tykkelsen ca. 0.12 mm. 



ings of Entalophora deflexa in Floridan Bryozoa; and I 

 may assume that it really is this species that I have had 

 before me. Any one who has had anything to do with, 

 cyclostomatous polyzoans, knows the great difficulties that 

 are frequently connected with their identification ; and one 

 dare hardly be sure that the arctic fauna includes both 

 Entalophora deflexa and clavata, as well as Stomatopora 

 deflexa, Couch. 



That which seems especially to characterise Enta- 

 lophora deflexa, is the considerable length of the free por- 

 tion of the zoæcia. I have found it to be 0.84 — 0.96 mm.,. 

 sometimes as much as 1.2 mm. The length, too, is subject 

 to considerable variation. The thickness of the zoæcia in 

 their free part was found to vary between 0.14 and 0.18 mm. 



I have not found any oæcia, but Smitt has drawn 

 them as a swelling below the bifurcation. 



Gen. Reticulipora. 

 Reticulipora intricaria, Smitt 



PL I, fig. 12. 



Reticulipora intricaria, Smitt (24, V), p. 1117; PI. XX, 



figs. 1 — 3. 

 Diastopora intricaria, Levinsen (15), p. 21. 

 Reticulipora intricaria, Xordgaard (18, II), p. 5. 



Occurrence. St. 48, 290, 315. 



Of the above-mentioned stations, 48 lies east of Ice- 

 land, and 290 and 315 between Norway and Spitsbergen. 

 The species has been taken once before in this district, 

 namely, by the Swedish Spitsbergen Expedition (Smitt). 

 Lindahl has found it in Baffin's Bay, and the Dijmphna 

 Expedition in the Kara Sea (Levinsen). Lastly, I have 

 found it at Sværholt in Finmark. 



Smitt (1. c.) has clearly pointed out the relationship 

 to Diastopora, especially obelia, in the presence of small 

 tubes, the closing of the older zoæcia by a calcareous lamella, 

 etc. This calcareous lamella (operculum) is perforated 

 here too. The colonies I examined possessed yet another 

 proof of their near relationship to Diastopora, in the oc- 

 currence of a fillet-like projection at the edge of the bran- 

 ches, corresponding to the extension of the basal lamina 

 in Diastopora. 



The length of the free portion of the zoæcia was 

 from 0.4 to 0.6 mm., and its thickness about 0.12. 



3* 



