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INDEX to the CONTENTS of the GALLERY. 



r Case 1. Balanoglossus. 



2-3. Tunicates. 



4. Amphioxus (Lancelet). 



5. Lampreys. 



6-7. Varieties of Form among Fishes. 



8-9. Topography, Scales and Skeleton of Fishes. 



10. Heart, Breathing-organs and Abdominal 

 Viscera of Fishes. 



11. Central Nervous System of Fishes. 



12. Embryology and Development of Fishes. 



13. Secondary Sexual characters of Fishes. 



14. Some Bionomic Curiosities. 

 15-20. Characteristic Fishes of the Deep Sea. 

 21-22. Scheme of Classification of Fishes. 

 23-24. Subclass Dipnoi (Amphibious Fishes). 

 25-29. Ganoid Fishes. 

 30-32. Subclass Chondropterygii : Chimseras. 



33-41. Subclass Chondropterygii : Sharks, Rays. 



42-43. Anacanthine Bony Fishes, 



43-59. Acanthopterygian Bony Fishes. 



60-73. Physostomous Bony Fishes. 



74-75. Plectognathous and Lophobranch Bony Fishes, 



