CONTENTS. 
PAGE 
INTRODUCTION ; 3 3 ‘ 4 ; 1 
SECTION I. 
On the Structure and Growth of the Chorda Dorsalis and Cartilage : = le 
1. Chorda dorsalis. : : : ° 5 wn 
2. Cartilage . : , : > - yt) 
SECTION II. 
On Cells as the Basis of all Tissues of the Animal Body . c « 36 
First division. On the ovum and germinal membrane . : - 40 
Second division. Permanent tissues of the animal body : . 64 
Cuass I. Isolated, independent cells Z z ‘ ‘ = 167 
1. Lymph-corpuscles : - : : 5 lee 
2. Blood-corpuscles 5 = “ 5 toy 
3. Mucus-corpuscles : 5 - 5 5 
4. Pus-corpuscles . < : ey it 
Cuass II. Independent cells united into continionk tissues ‘ - éd 
1. Epithelium é é : . . Sy 4 tite 
2. The pigmentum nigrum : : : ae 
3. Nails . : : 3 : : a 80 
4. Hoofs : - - : : >) ell 
5. Feathers : ; : : 4 4 thy 
6. The crystalline lens. : 87 
Cuass III. Tissues, in which the cell-walls arn coalesced with Sich einen 
or with the intercellular substance. : 3 5 ale 
1. Cartilage and bone. : ; ; ie i 
2. The teeth - ib. 
Crass IV. Fibre-cells, or tissues, wean tietints from valle that Tecdane 
elongated into bundles of fibres. : - - 110 
1. Areolar tissue. : : ; : Atle 
2. Fibrous tissue 5 : - ; a alee 
3. Elastic tissue . : - é . 124 
