XX 



ANALYSIS OF THE LESSONS. 



LESSON XL VIII. NUTRITION IN FISHES AND REPTILES, p. 167. 



733. The habits of Fishes. 734. Their accessory glands. 735. The ali- 

 mentary canal. 736. Alimentary canal of the Herring described. REPTILES. 

 737. Their habits. 738. The Frog's tongue. 739. They are carnivorous and 

 predaceous. 740. The subject continued. 741. Their sense of hearing and 

 sight. 742. Method of seizing their prey. 743. It must be done quickly. 744. 

 Harmlessness of Frogs. 745. The Frog's teeth : pulps injected. 746. Alimen- 

 tary apparatus described. 747. The stomach injected. 748. The duodenum. 

 749. The ileum. 750. Batrachians not amphibious. 751. The true amphibia 

 described. 752. The Menobranchus described. 753. Its internal structure. 754. 

 The Menopoma : its stomach. 755. The gradual development of the stomach. 

 756. Stomach of the Snapping Turtle. 



LESSON XLIX. NUTRITION IN BIRDS, p. 173. 



767. Adaptation of the nutrimental apparatus. 758. Comparison of the 

 several forms of the bill in Birds. 759. The same subject continued. 760. 

 Continued and concluded. 76L The nutrimental canal of the Fowl described. 

 762. Continued. 763. The muscles of the gizzard: their action. 764. Ne- 

 cessity of flint for Canary birds. 765. The subject continued. 766. The re- 

 mainder of the alimentary canal described. Same in the Crow. 



LESSON L. NUTRITION IN THE MAMMALIA, p. 177. 



767. Great variety of the digestive organs in this class. 768. The develop- 

 ment of organs of sense accessory to nutrition. 769. The Rodentia, stomach 

 of the Rat. 770. The same examined internally : injected, and microscopically 

 examined. 771. The Rat, omnivorous. 772. The mode in which they are sup- 

 posed to digest their food. 773. Musk-rat and other Rodents, vegetable feeders. 

 774. Especial form of nutrimental organs necessary for grass. 775. The Ru- 

 minants possess four stomachs. 776. Their natural gregarious habits. 777. 

 Their domestic habits. 778. Mode of feeding : what becomes of the food. 

 779. The subject continued. 780. Action of the second stomach. 781. The 

 subject continued. 782. Process of insalivation, or " chewing the cud." 



LESSON LI. NUTRITION IN MAMMALIA, CONTINUED, p. 180. 



783. The third stomach hi the ruminant described. 784. The fourth and last 

 stomach; its function. 785. Peculiar addition to the second stomach in Camels 

 and Dromedaries. 786. Comparative length of the intestinal canal. 787. Its 

 structure. 788. "Peyer's glands "in the small intestines. 789. Structure of 

 the large intestine. 790. The teeth in the Carnivorous animals. 791. Structure 

 of the tongue in the higher animals. 792. Peculiar structure of the tongue in 

 the feline animals : use they make of it. 793. Subject continued. 794. The 

 like. 795. The Cat's tongue : its effects. 



LESSON LIL NUTRITION IN MAMMALIA, CONCLUDED, p. 182. 



796. The filiform papillae, where situate : the fungiform and circumvallate 

 papilla: other filiform papillae. 797. Structure of the stomach; Villi of 



