DESCRIPTION OF COLOURED PLATES. 

 PLATE I.— Page 255. 



PROTOPHYTA. 



Fig. 1. Peziza bicolor— 2. Truffle— 3. Sphaeriaherbaram : a. piece of dead plant, with 

 S. herbarum natural size ; b. section of same, slightly magnified ; d. Ascus with 

 spores, and paraphyses more magnified— 4. Peziza pygmsea — 5. Proliferous 

 form of same — 6. P. corpulasis; Ascus with spores and paraphyses, 

 merely given as a further illustration of structure in Peziza — 7. Yeast, 

 good— 8. Yeast, exhausted— 9. Phyllactinia guttata— 10. Yeast with favus 

 spores and mycelium— 11. Favus ferment,' with torulaj and bacteria like 

 bodies— 12. Puccinia-like-form in ditto, growing from saccharine solution — 

 13. Aerozoa — 14. Sporules, <fce. from eczema produced by yeast — 15. Volvos 

 globator — 16. Amoeboid condition of portion of volvox — 17. Puccinia buxi — 

 18. Ditto, more enlarged — (17 to 20 illustrate Coniomycetes) — 19. iEeidium 

 grossularia?, transverse section of leaf of currant affected by : o. spermo- 

 gones on upper surface ; b. perithecia with spores — 20. Phragmidium bul- 

 bosum, development of — 21. Parmelia parietina, trans, section through a 

 . spermogone, showing green gonidia and spermatia escaping — 22. iEeidiurn 

 berberidis, from leaf of berberry— 23. Vaucheria sessilis — 24. Stephano- 

 sphpera pluvialis : a. Full-grown example, germ-cells spindle-shaped, with 

 protoplasmic elongations. 6. Resting-cell. c. division into four. d. Free 

 swimming ciliated young specimen, e. Amoeboid condition— 25. a, 6, c, d, e, 

 f and g, Development of Lichen gonidia— 26. Parmelia stellaris (Lichen), 

 vertical section through apothecium, showing asci, spores, and paraphyses, 

 with gonidia and filamentous medulla, o. Spermatophore with spermatia 

 — 27. Moss gonidia assuming amoeboid form. 



The intention of this plate has heen, first to show illustrations of 

 various forms of Protophytes, as the lowest types of vegetable 

 structure ; (from 7 to 14), supposed modes of development or rudi- 

 mentary conditions ; and Confervoidere illustrated by Vaucheria in 

 the Siphonaces, f. 23, Stephanosphsera 24, and Volvox 15, in the 

 Volvocinea? ; and their remarkable amoeboid conditions illustrated 

 by 16, 24 e, and 27. The protean forms assumed in developmenl 

 by 7 to 14 ; 24 a to e ; 25 a to g, and 27. 



PLATE II.— Page 274. 



PROTOPHYTA. ALG.E. 



Fi$. 27. Ceramium acanthonotum — 28. Triploceras gracile — 29. Cosmanum 

 radiatum— 30. Micrasterias denticulata — 31. Docidium pristidse — 32. Calli- 

 thamnion plumula — 33. Diatomacea?, living : a. Licmophora splendida ; 

 b. Achnanthes longipes; c. Grammatophora marina. These figures are in- 

 tended to show the general character of the eudochrome and growth of 

 frustule — 34. Callithanmion refractum — 35. Jungermannia albicans. 6. re- 

 presents elater and spores— 36. Leaf with antheridia, or male elements, which 

 are represented more magnified at a to the left of the figure — 37. Ceramium- 

 echinotum — 38. Pleurosigma angulatum, side view— 39. Delesseria hypo- 

 glossum— 40. Pleurosigma angulatum, front view, endochrome not repre- 

 sented — 41. Ceramium flabelligerum. 



The intention of this plate is chiefly to show various forms of 

 Algte. The figures of Desmids, 28 to 33, illustrate the appearance 



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