for the Microscope. 3 



the elongated serrated cells lie in almost all directions. 

 The form and arrangement of cells and the disposition of the 

 stomata in the cuticle of different plants furnish an almost 

 unlimited variety in objects of this class. (PI. I., fig. 33.) 



5. CUTICLE OF MISTELTOE (Viscum album}. One of 

 the characteristics of this cuticle is the large number of 

 elongated stomata it contains. The cells are about twice 

 as long as broad, and lie irregularly in all directions. Il 

 is a thick, tough cuticle, and requires prolonged macera- 

 tion in water for its separation, and is a good subject for 

 experiment by boiling in diluted nitric acid. (PI. I., fig. 47.) 



6. CUTICLE OF IRIS (Iris Germanica}. Large pieces of 

 the cuticle of the garden Iris may often be stripped off, by 

 exercising a little care, between the thumb and finger, 

 without any previous maceration. The cells are very long, 

 hexagonal, but much flattened at the sides, so that two of 

 the angles are so obtuse that they scarcely appear like 

 angles. (PI. I., fig. 37.) 



7. CUTICLE OF WATER-CROWFOOT (Ranunculus aqua- 

 tilts). The cells are regular hexagons with equal sides, 

 and offer a marked contrast to the last-named and many 

 others. (PI. I., fig. 36.) 



8. CUTICLE OF HELLEBORE (Helleborus fcetidus). The 

 Stinking Hellebore yields a very characteristic cuticle, the 

 cells being many-angled, and the stomata large. (PL I., 



fig- 35-) 



9. CUTICLE OF PLANTAIN (Plantago major). This 

 cuticle, when removed from either the leaves or their foot- 

 stalks, retains the form of the hairs over which the cuticle 

 also extends. Along the midrib the cells are much elon- 

 gated, otherwise it is difficult to make out the delicate 

 outline of the cells. 



10. CUTICLE OF DEUTZIA (Deutzia scabrd). One ot 

 the most beautiful of cuticles, on account of the stellate 

 hairs with which it is studded. Though not a native, both 

 this and Deutzia gracilis are common greenhouse plants. 



1 1. CUTICLE OF ELDER (Sambucus nigra). Cells large, 

 and elongated hexagons, with broad divisions. The taper- 

 ing simple hairs sprinkled over the surface give additional 



12 



