Plate XIX. 



Page 

 Fig. I. Hamacautha iinplicaiis n. sp. a styli of different sizes, b developmental forms, 

 X 165, c diancistra, d two developmental forms, x 380, e rhaphides, single 

 and as trichodragma, x 380 104 



— 2. Hamacantha iniplicaiis n. sp. Dermal membrane with skeleton, x 58 — 



— 3. Hamacautha implicans n. sp. Transverse section of skin with projecting spicules, — 



X ca. 54 — 



— 4. Hamacantha implicaus n. sp. Piece of a membrane with fibres and diancistra 



in rosettes, x 32 — 



— 5. Hamacantha intpHcans n. sp. An oscular cone stretched out, x ca. 20 — 



— 6. Hamacantha implicans n. sp. An oscular cone contracted, seen from above, 



showing the vertical spicules arranged in a bandlike manner, x ca. 20 — 



