BIBLIOGRAPHY AND AUTHOR INDEX 



781 



Picado, C, 1911. Bromeliaces epiphytes comme 

 milieu biologique. Compt. rend. Acad. Sc, 

 Paris, J 53; 960-963. p. 438. 



1913. Les Bromeliaces epiphytes consid- 



erees comme miUeu biologique. Bull. Sc. 

 Ent. France et Belgique, 7; 215-560. p. 

 438. 



Pickles, Walter, 1935. Populations, Territory 

 and Interrelations of the Ants Formica 

 fusca, Acanthomyops niger and Myrmica 

 scabrinodis at Garforth (Yorkshire). J. 

 Anim. EcoL, 4: 22-31. p. 419. 



1936. Populations and Territories of tlie 



Ants, Formica fusca, Acanthomyops jiaviic 

 and Myrmica ruginodis, at Thornhill 

 (Yorks.) J. Anim. EcoL, 5; 262-270. p. 

 419. 



1937. Populations, Territories and Bio- 



masses of Ants at Thornhill, Yorkshire, in 



1936. J. Anim. Ecol., 6; 54-61. pp. 419, 

 525. 



1938. Populations, Territories and Bio- 

 masses of Ants at ThornhiU, Yorkshire, in 



1937. J. Anim. EcoL, 7; 370-380. pp. 266, 

 419. 



1940. Fluctuations in the Populations, 



Weights, and Biomasses of Ants at Thorn- 

 hiU, Yorkshire, from 1935-1939. Tr. Roy. 

 Entom. Soc, London, 90: 467-485. p. 419. 



Pielou, D. P., and Gunn, D. L., 1940. The 

 Humidity Receptors of the Mealworm 

 Beetle, Tenebrio molitor. I. The Reaction 

 to Differences of Humidity. II. The Hu- 

 midity Receptors. III. The Mechanism of 

 the Reaction. J. Exper. Biol., 17: 286- 

 294; 295-306; 307-316. pp. 189, 558. 



Pierce, W. D., Cushman, R. A., and Hood, C. 

 E., 1912. The Insect Enemies of the Cot- 

 ton Boll Weevil. U. S. Dept. of Agr., Bur. 

 Entom. Bull., 100: 1-99. p. 52. 



Pieron, Henri, 1913. Le probleme physiologi- 

 que du sommeil. Paris, p. 553. 



Pilsbry, H. A., 1894^1935. Manual of Conchol- 

 ogy. Second Series, Vols. 5-52. Philadel- 

 phia, Acad. Nat. Sc. p. 609. 



Pirsch, G. B., 1923. Studies on the Tempera- 

 ture of Individual Insects with Special 

 Reference to the Honey Bee. J. Agr. Res., 

 24: 275-288. p. 97. 



Pirschle, K., 1938. Die Bedeutung der Spur- 

 enelemente fiir Ernahrung, Wachstum und 

 Stoffwechsel der Pflanzen. I. Li, Na, Rb, 

 Cs, Be, Sr, Ba, B, As, Sb, Bi, Se, Te, Mo, 

 W. Ergeb. Biol., 15: 67-168. p. 205. 



Pitelka, F. A., 1941. Distribution of Birds in 

 Relation to Major Biotic Communities. Am. 

 Mid. Nat., 25: 113-137. p. 494. 



Plate, Ludvidg H., 1913. Selektionsprinzip und 

 Probleme der Artbildung. Leipzig & Ber- 

 Un, Engelmann. p. 638. 



Plateau, F., 1871. Recherches physico-chemi- 

 ques sur les articules aquatiques. Mem. 

 Acad. Belgique, 36: p. 20. 



Plough, H. H., 1941. Spontaneous Mutability 



in Drosopliila. Cold Spring Harbor Sym- 

 posia on (^uant. Biol., y; 1^7-136. p. bOO. 



1942. Temperature and Spontaneous Mu- 



taUon. Biol. Symposia, 6: 9-20. p. 600. 



Plunkett, C. K., 1926. liie Interaction of 

 Genetic and Euviromnental I'actors ni 

 Development. J. Exper. ZooL, 46: 181-244. 

 p. 408. 



1944. The Primary Physicochemical Basis 



of Organic Evolution, In Alexander, J., 

 Colloid Chemistry, 5; 1173-1197. p. 630. 



PoUmanti, O., 1911. AcLivite et repos chez 

 les animaux marine. Bull. Inst. Gtn. 

 Psych., 11: 125-163. p. 553. 



Polya, G., 1931. Sur quelques points de la 

 theorie des probabilites. Arm. Inst. Heru:i 

 Poincare, 1: 117-162. p. 365. 



PooL R. J., Weaver, J. E., and Jean, F. C, 

 1918. Further Studies in the Ecotone be- 

 tween Prairie and Woodland, Univ. of Ne- 

 braska Bot. Surv., 18: 1-47. p. 477. 



Pope, C. H., 1937. Snakes Alive and How 

 They Live. New York, Viking, p. 537. 



1939. Turtles of tlie United States and 



Canada. New York, Knopf, p. 487. 



1941. Copulatory Adjustment in Snakes. 



Field Mus. Nat. Hist. (ZooL), 24: 249- 

 252. p. 618. 



1944. Amphibians and Reptiles of the 



Chicago Area. Chicago, Chicago Nat. Hist. 

 Mus. p. 659. 



Porter, K. R., 1941. Developmental Variations 

 Resulting from the Androgenetic Hybridi- 

 zation of Four Forms of Rana pipiens. 

 Science, 93: 439. p. 677. 



Portier, P., 1918. Les Symbiotes. Paris, Mas- 

 son, p. 712. 



Post, Hamp von, 1868. Forsok till iakttagelser 

 i djur-och vaxt-statistik. Ofversigt Svenska 

 Vetenskaps akad., 24: 53-79. p. 34. 



Potter, Jane H., 1947. Some Observations on 

 the Relation of Breed in Hens to Their 

 Social Rank and to Their Success in Initial 

 Pair Contacts. Master's thesis. Univ. of 

 Chicago Libraries, p. 414. 



1949. Dominance Relations Between Dif- 

 ferent Breeds of Domestic Hens. Physiol. 

 ZooL, 22: 261-279. p. 414. 

 Potzger, J. E., 1946. Phytosociology of the Pri- 

 meval Forest in Central-Northern Wiscon- 

 sin and Upper Michigan, and a Brief 

 Post-Glacial History of the Lake Forest 

 Formation. Ecol. Monogr., 16: 211-250. 

 p. 575. 



and Wilson, I. T., 1941. Post-Pleistocene 



Forest Migration as Indicated by Sedi- 

 ments from Tliree Deep Inland Lakes. 

 Am. Mid. Nat., 25: 270-289. p. 545. 

 Pouchet, Georges, 1872. Note sur le role des 

 nerfs dans les changements de coloration 

 des poissons. J. Anat. Physiol., 8: 71-74. 



1876. Changements de coloration sans 



I'influence des nerfs. J. Anat. Physiol., 12: 

 1-90, 113-165. p. 22. 



