PLATE. XXVIa.
P ig .
1. Spermatozoa of Harmotho'é imbricata. X Zeiss, 1 oc.. D obj.
2. Spermatozoa of Lepidonotus squamatus. X idem.
3. Trochospheres of H. imbricata assuming a greenish hue. Magnified.
4. View of a more advanced trochosphere of March 28th, with the projecting mouth to
the left. X 116.
5 and 6. Lateral and dorsal views of other examples. X 52.
7. More advanced larva with traces of feet, but without bristles, or with such only
indicated.
8. A further stage in which the feet have minute bristles. (June 26th.) x 82.
9. Larval Polynoë with well-marked feet and bristles, minute scales, and anal cirri
X 52.
10. Nectochsete stage of Harmotho'é. (April 20th.) x 52.
11. Nectochaste stage of a Polynoid (June 28th), with median and lateral tentacles and
anal cirri. X 52.
12. Nectochaste stage of Harmotho'é, sp. (April 27th.) X 50.
13. Nectochffite stage of Polynoë, sp. (July 18th Jlf inch long, x 50.
14. More advanced nectochmte conditions in a form approaching Lagisca or Evarne.
(October 25th.) x about 40.
15. Dorsal view (in spirit) of nectochiete stage of a form approaching Lepidonotus
squamatus. (June.) x 40.
16. Ventral view of the foregoing. Similarly magnified.
17. A slightly later stage. Similarly enlarged.
18. Stage with developing palpi, and with additional eye-spots. Similarly magnified.
19. Stage of the same form with distinct palpi, median and lateral tentacles, x about 35.
20. Dorsal view of Panthalis (Erstedi, from a figure kindly sent by Mr. Arnold Watson,
21. Proboscis and jaws of Sthenelais boa. Enlarged under a lens.
22. Metatroch stage of Sthenelais or Sigalion seen from above. (October 22nd.) x 50.
23. Post-larval Sigalion, pelagic condition. (October 28th.) x 50.
24. Dorsal.view of Pholoë minuta. Enlarged.
25. Spermatozoa of Pholoë minuta. (June 24th.) x 350.