112 MICROSCOPICAL RESEARCH 



PLATE XXI. 



CELL STEUCTUEE AND CELL CONTENTS. 



Fig. 74. Transverse section. Male conceptacleof 'Fucusvesiculosus 

 X 60 dia. Fixed with Clironio-Acetic solution. Stained 

 with. Aniline-picrate and Grossypimine. 1. Limiting tissue 

 of thallus. 2. Lining of conceptacle. 3. Protective hairs, 

 among which are distributed the antheridia, stained red. 

 4. Mouth of conceptacle. 



Fig. 75. Transverse section of female conceptacle of ' Fucus, sp.' 

 X 60 dia. Fixed and stained, as above. 1. Limiting tissue 

 of thallus. ■ 2. Protective hairs. 3. Oogonia in various 

 stages of development. 4. Opening, or mouth of conceptacle. 



Fig. 76. Entire thallus of Fern under surface. ' Gymnogramma sp ' 

 X 10 dia. Fixed with Chromo-Acetic solution. Stained with 

 Borax Carmine. 1. Thallus. 2. Antheridia. 3. Archegonia. 

 4. Ehizoids (root hairs). 



Fig. 77. Vertical section. Thallus of Fern, passing through the 

 Archegonia x 160 dia. Fixed with Chromo-Acetic solution. 

 Stained with Brazilin. 1. Upper surface of thallus. 2. The 

 canal-cells of neck of Archegonia. 3. Ovum. (Section 

 prepared by the 'cold' paraffin method and cut ^/ 5000 in-) 



