VI

CONTENTS.

ON THE NUCLEI, FORMATION, AND GROWTH OFVEGETABLE CELLS. By Prof. C. Nageli.

PART IX.

PAGE

IV. Free Cell-formation . . . . . .95

a. Without Visible Nucleus . . . . ib.

b. With a pai-ietal Nucleus .... 103

c. Of free Cell-formation as a general Law . . Ill

V. On Cell-formation in general .... 123

VI. On the Growth of Cells ..... 143

ON THE UTRICULAR STRUCTURES IN THE CONTENTSOF CELLS. By Prop. C. Nageli.

Introductory . . . . . . .101

1. Nuclear Utricles, Nuclei ..... 165

2. Spermatic Utricles ..... 171

3. Nucleoli.172

4. Mucilage- (Protoplasm-) utricles .... 173

5. Proliferous Utricles . ... 175

6. Colour-utricles . . . . . .176

7. Starch-utricles, Starch-granules .... 183

8. General Retrospect . . . . .188

REPORT ON PHYSIOLOGICAL BOTANY for 1844 and 1845.

By Prof. Link.

General Observations ..... 193

I. Internal Structure of Plants .... 221

II. Stem and Root ...... 249

III. Root , Tubers, Prickles , Tendrils, Glands, Stomata . . 264

IV. Leaves.270

V. Flowers, Fructification ..... 282

VI. Fruit, Seeds, Germination ..... 290

VII. Individual Orders and Genera of the Phanerogamia in Refer-

ence to Physiology ..... 296

VIII. Ferns, Mosses, Lichens , Algse, Fungi . . . 304

IX. Monsti'osities . . . . . .312