A One Thousand Objects 



interest to this cuticle, which, however, requires careful 

 manipulation. 



12. CUTICLE OF IVY (Hedera helix). Cells of irregular 

 form, with waved or toothed margins. The stomata are 

 also very numerous. Cuticle easily removed from this, 

 as from all hard and leathery leaves. 



13. CUTICLE OF FERN (Scolopendrium vnlgare). This 

 is easily separated either by maceration or boiling in dilute 

 nitric acid. The cells are irregular hexagons of rather 

 large size. 



14. CELLS OF Boc-Moss (Sphagnum cymbifolium}. The 

 cells of Bog-Moss, when fully matured, are well known to 

 microscopists for the spiral character of the internal de- 

 posits upon their cell walls, but when very young the cell- 

 form is rhomboidal without markings, and contrast strongly 

 with those of the older leaves. (PI. I., fig. 42.) 



15. CELLS OF CRENULATE SCALE-MOSS (Gymnomitrium 

 crcnulatuni). The form of the majority of cells is hexa- 

 gonal, but those at the margins of the leaves are elongated, 

 pointed, and more transparent. The cell structure of all 

 the species of Scale-Mosses are well worthy of examina- 

 tion, and I am assured by a friend that he has mounted 

 them successfully in water-glass (silicate of soda), but 

 hitherto I have seen none of his specimens. (PI. I., 

 fig. 49.) 



16. CELLS OF THREE-TOOTHED SCALE-MOSS (Plagio- 

 chila tridcntatd). The hexagonal cells of this species are 

 larger than usual, and, as the figure indicates, have a very 

 attractive appearance. (PI. I., fig. 50.) 



17. CELLS OF LADDER SCALE-MOSS (AlicuJaria scalaris). 

 The hexagonal cells contain minute granules, which are 

 arranged from two to four in a line in their interior. 



1 8. CELLS OF CURLY-LEAVED SCALE-MOSS (futigcr- 

 mannia curvifolia). The cells of this Scale-Moss are 

 rectangular or squarish, with an almost transparent border, 

 containing usually a pair of granules in their interior. (PI. 



I-, %. 43-) 



19. PETAL OF GERANIUM. The petals of Geranium, 

 Pelargonium, Heartsease or Pansy, and indeed of innu- 



