Plate VI. 



Page 

 Fig. I. Bieinma rosea Frstdt. The largest piece seen from the pore side; the skin wan- 

 ting in a few places, '/i 82 



— 2. Btefuma rosea Frstdt A piece probably from the middle of the sponge, seen 



from the oscnlar side. Vi — 



— 3. Phlceodictyon elougaUtm Tops, '/i 59 



— 4. Phlceodictyon elongatum Tops., highly incrnsted with sand. '/, — 



— 5. Gellius luridiis n. sp. Somewhat damaged above, bnt less than the two follo- 



wing ones, i/i 64 



— 6. Gellius liiridjts n. sp. Broken off above, '/i — 



— 7. Gellius liiridiis n. sp. Broken off above, '/i — 



— 8. Gellius liiridiis n. sp. The preceding specimen (fig. 7) cnt through longitudinally. 



Vi - 



— 9. Phlceodictyon irregulare n. sp. '/i 61 



— 10. Phlceodictyon irregulare n. sp. '/i — 



— II. Phlceodictyon tuber n. sp. '/i 57 



— 12. Phlceodictyon tuber n. sp., incrnsted with sand, '/i — 



— 13. Phlceodictyon tuber n. sp., showing a broken off fistula, '/i — 



— 14. Desmacella gi'oenlandica Frstdt. Skin with oscula closed in different degrees. 



Ends of fibres are seen. ca. ^"/i 95 



