Plate IV. 



ec: ectoderm, me: mesogloea, c: cuticle, in: incrustation. 

 Figs. I — 4. Urticina felina (L) coriacea. 



I. Part of verruca, maceration preparation. Beale's carmine s: supporting cells, gl.: granulous 



gland cells. 



2. a: supporting cells, b: granulous gland-cells from a verruca, maceration preparation. 



■ — 3. Gland cells from the pedal disc, maceration preparation. 



— 4. a) mucus cells, b) yellowish gland cells from the column outside the verruca. 



— 5. Halcam-pa arctica Carlgr. Not incrusted specimen. Transverse section through part of the scapus 



with a papilla, ch: chitinized ectoderm cells? 



— 6. Scytophorus antarcticus (Pfeff.). Transverse section of part of the scapus. gl: gland cells, cJi: chitin- 



ized ectoderm cells. 



— 7. Pamedwardsia sarsii (Diib. & Kor.). Transverse section of part of the scapus with a papilla. 



ch: chitinized ectoderm cells. 



— 8. Halcampa duodecimcirrata (M. Sars). Transverse section of part of the scapus with a papilla. 



ch: chitinized ectoderm cells, gl: gland cells. 



— 9. Epiactis arctica (Verr.) Transverse section of part of the column with a spot, n: nematocysts, 



gl: gland cells. 



