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Article Contents

TITLE PAGE

1.INTRODUCTION

2.MEASUREMENT OF THE DISTRIBUTION AND KINEMATICS OF THE GAS

2.1.Methods of Observation

2.2.Distribution of the Gas

2.3.Velocity Fields

3.THE GENERAL ROTATION

3.1.Rotation Curve Shape and Galaxy Morphological Type

3.2.Rotation Curves in the Outer Parts of Spiral Galaxies

3.3.Velocity Dispersion Measurements

4.NONCIRCULAR MOTIONS

4.1.The Central Regions

4.2.Large-Scale Effects of Nuclear Activity

4.3.Bars and Oval Distortions

4.4.Density Wave Streaming

4.5.Warps in the Outer Parts of Spiral Galaxies

4.6.Kinematical Effects of Tidal Interactions

5.CONCLUDING REMARKS

REFERENCES