1906. The Habits of Certain Tortoises. Jour. Comp. Neurol. and Psychol., Vol. XVI, pp. 126-152. NEWMAN, H. H., and PATTERSON, J. T. 1909. Field Studies of the Behavior of the Lizard, Sceloporus Spinosus Floridanus. Bull. Univ. of Texas, No. 137, pp. 1-24. ORTMANN, A. E. 1905. The Crawfishes of the State of Pennsylvania. Mem. Carnegie Mus., Vol. II, pp. 343-523. Habits and habitats of crawfish. PARKER, G. H. 1903. The Phototropism of the Mourning-cloak Butterfly, Vanessa Antiopa Linn. Mark Anniversary Volume, pp. 453-469. New York. 1903. The Sense of Hearing in Fishes. Amer. Nat., Vol. XXXVII, pp. 185-204. 1905. The Functions of the Lateral-Line Organs of Fishes. U. S. Bur. Fisheries, Bull. Vol. XXIV, pp. 185-207. 1908. The Sensory Reactions of Amphioxus. Proc. Amer. Acad. Arts and Sciences, Vol. XLIII, pp. 415-455. 1910. The Reactions of Sponges, with a Consideration of the Origin of the Nervous System. Jour. Exp. Zoöl., Vol. VIII, pp. 1-41. PEARL, R. 1903. The Movements and Reactions of Fresh Water Planarians. Quart. Jour. Micros. Sci., Vol. XLVI, pp. 509-714. A good example of a very detailed study of behavior of a lower animal. PEARSE, A. S. 1910. The Reactions of Amphibians to Light. Proc. Amer. Acad. Arts and Sciences, Vol. XLV, pp. 161-208. PECKHAM, G. W. and E. G. 1898. On the Instincts and Habits of the Solitary Wasps. Bull. No. 2, Wis. Geol. and Nat. Hist. Surv. pp. 245. 1905. Wasps, Social and Solitary. pp. 311. Boston and New York. A revised and enlarged edition of the preceding reference. PIERSOL, W. H. 1909. The Habits and Larval State of _Plethodon cinereus erythronotus_. Trans. Canadian Inst., Vol. VIII, pp. 469-493. Contains a useful list of references on Amphibians. PORTER, J. P. 1904. A Preliminary Study of the Psychology of the English Sparrow. Amer. Jour. Psychol., Vol. XV, pp. 313-346. 1906. The Habits, Instincts and Mental Powers of Spiders, Genera Argiope and Epeira. Amer. Jour. Psychol., Vol. XVII, pp. 306-357. 1906. Further Study of the English Sparrow and Other Birds. Amer. Jour. Psychol., Vol. XVII, pp. 248-271. Includes the Vesper Sparrow, Cowbird, Common Pigeon, Passenger Pigeon, and Red-headed Woodpecker. 1910. Intelligence and Imitation in Birds, a Criterion of Imitation. Amer. Jour. Psychol., Vol. XXI, pp. 1-71. Studies of English Sparrow, Cowbird, Snowbird, White-throated Sparrow, Field Sparrow, Bluebird, White-crowned Sparrow, Fox, Song and Tree Sparrows, Blue Jay, Baltimore Oriole, and Crows. POULTON, E. B. 1896. On the Courtship of Certain Acridiidæ. Trans. Ent. Soc. London, pp. 233-252. REIGHARD, J. 1903. The Natural History of _Amia calva_ Linnæus. Mark Anniversary Volume, pp. 57-109. REYNAUD, G. 1900. The Laws of Orientation Among Animals. Smithsonian Report for 1898, pp. 481-498. RILEY, C. F. C. 1912. Observations on the Ecology of the Dragon-Fly Nymphs: Reactions to Light and Contact. Ann. Ent. Soc. Amer., Vol. V, pp. 273-292. SCHEFFER, T. H.