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. Halcampa 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, ch: chitin- 

 ized ectoderm cells. 



7. Paraedwardsia sarsii (Dub. & 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. : nematocysts, 

 gl: gland cells. 



