Plate XIIL 



Page 

 Fig. I. Gelluts Inridns n. sp. a oxea, x 165, b toxa of different sizes, x 585, c sigmata 



of different sizes, x 585 64 



— 2. GelMus Inridiis n. sp. Longitudinal section, showing the dermal layer, lanielloe 

 and canals, x ca. 2. (After a dried preparation, which makes the skeleton 

 appear distinctly) — 



— 3. Gellms iiiridus n. sp. Longitudinal section through the dermal layer in a place 



where this layer is thick, x ca. 33. a the part marked off as special dermal 

 layer — 



— 4. GelliHS iitridiis n. sp. Dermal membrane with spicules and pores, x 65 — 



— 5. Gel/ius hiridiis n. sp. Piece of skeleton lamella with the holes formed by the 



passage of the canals, X2 — 



— 6. Gellins Inridiis n. sp. The upper part of fig. 5, x 18 — 



— 7. Gellms luridus n. sp. Spicules from the dermal membrane, showing the 



cementing by spongin, x no — 



— 8. Gellms limdiis u. sp. Two single spicules with spongin coats, x no — 



— 9. Gellins microtoxa n. sp. a oxea, b de\-elopmental forms, x 165, c toxa of diffe- 



rent .sizes, X 585, d sigmata of different sizes, e developmental forms, x 585. 67 



— 10. Gellms microtoxa n. sp. Dermal membrane with spicules and cellules spheru- 



leuses, partly scattered, partly forming a band, >c ca. 65 — 



— II. Gellins primitivus n. sp. a oxea of different sizes, x 255, b toxa of different 



sizes, X 485 69 



— 12. Gellins proximus n. sp. a oxea of different sizes, x 255, b toxa of different 



sizes, X 485 70 



