enemies, while the flexibility of its neck may have compensated for the want of strength in its jaws and its incapacity for swift motion through the water, by the suddenness and agility of the attack which it enabled it to make on every animal fitted for its prey which came within its reach.” 7. “Ichˈthy-o-sauˈrus” (fish-lizard). This animal, which also is known only by its fossil remains, must have been about thirty feet long. It had enormous eyes, a long and large head, a mouth armed with powerful teeth, and a short neck. The body was fish-like in form, and the four paddles, resembling those of a whale, were comparatively small. The tail was long and gradually flattened toward the end; it was the principal organ of locomotion. They were very active in their movements, and consequently were dangerous enemies to all other animals living in the sea. Their food consisted chiefly of fishes. 8. “Chelonia,” kē-loˈnĭ-ä. 9. “Loricata,” lŏrˌi-cāˈtä. 10. “Aves,” āˈvēs. 11. “Anchylosed,” angˈkī-losed. United; made fast; stiffened. 12. “Esophagus,” e-sofˈa-gus. The passage leading to the stomach, through which the food and drink pass. 13. “Raptores,” rap-tōˈres. 14. “Insessores,” in-ses-sōˈres. 15. “Cursores,” cur-sōˈres. 16. “Grallatores,” gralˌ-lā-toˈres. 17. “Natatores,” natˈ-a-tōˈres. 18. “Monotremata,” monˈo-tremˈa-tä. 19. “Edentata,” ē-denˈta-tä. 20. “Armadillos,” ar-ma-dilˈlōs. 21. “Sirenia,” sī-rēˈni-ä. 22. “Cetacea,” sē-tāˈsē-ä. 23. “Cheiroptera,” kī-ropˈte-rä. 24. “Rodentia,” rō-denˈshĭ-a. 25. “Ungulates,” unˈgū-lates. 26. “Pinnigrades,” pinˈni-grades. 27. “Plantigrades,” plantˈĭ-grades. 28. “Digitigrades,” digˈi-ti-grades. * * * * * Those who wish to carry on further the study of Animal Biology will find a wide range of reading on the subject awaiting them. We append a list, but are unable to give publishers and prices: “Comparative Zoölogy,” by James Orton; “Methods of Study in Natural History,” by Agassiz; “Principles of Zoölogy,” by Agassiz and Gould; “Elementary Biology,” by Huxley and Martin; Wood’s “Illustrated Natural History;” Jones’s “Animal Creation;” “Elements of Zoölogy,” by Holder; Packard’s “Zoölogy;” Nicholson’s “Manual of Zoölogy;” “Winners in Life’s Race: or, The Great Backboned Family,” by Arabella B. Buckley; “Life and her Children: or, Glimpses of Animal Life from the Amœba to the Insects,” by Miss Buckley.