TITLES. 
Gen. Sub. 41 
701. Pearl, R. The movements and reactions of fresh- water Planarians ; 
a study in animal behaviour. Quart. J. Micr. Sci. xlvi, pp. 509-714. 
702. & Dunbar, F. J. Variation and correlation in Arcella. 
[Abstract.] Rep. Michigan Ac. v, pp. 202-204. 
703. & Fuller, W. N. Variation and correlation in the earthworm. 
[Abstract.] T. c. pp. 200-202. 
704. Pearson, K. Mathematical contributions to the theory of evolution. 
xii. On a generalised theory of alternative inheritance* with special 
reference to Mendel’s laws. Phil. Trans. A. Vol. 203, pp. 53-86. 
705. . On a criterion which may serve to test various theories of 
inheritance. P. R. Soc. London lxxiii, pp. 262-280. 
706. . Mendel’s law. Nature lxx, pp. 626, 627. [Of. a previous 
botanical note by Lock, t. c. p. 601.] 
707. . A Mendelian’s view of the law of ancestral inheritance. 
Biometrika iii, pp. 109-112. 
708. . On the laws of inheritance in man. n. On the inheritance 
of the mental and moral characters in man, and its comparison with 
the inheritance of the physical characters. T. c. pp. 131-190. 
709. * . On the inheritance of the mental and moral characters in 
man, and its comparison with the inheritance of physical characters. 
London Anthropolog. Inst. 
Review, Nature lxx, p. 137. 
. [See also Barrington, Lee & Pearson (45).] 
710. Peebles, Florence. The location of the chick embryo upon the 
blastoderm. J. exp. Zool. i, pp. 369-383, pis. i, ii. 
711. Peirce, G. J. Certain undetermined factors in heredity and environ- 
ment. Amer. Natural, xxxviii, pp. 285-293. 
712. Pelseneer, P. Quelques probRmes zoologiques de l’Antarctique. 
C.R. Ass. franc, xxxii, 2, pp. 810-812. 
713. . La “ligne de Weber” limite zoologique de l’Asie et de 
l’Australie. Bull. Ac. Belgique 1904, pp. 1001-1022, and note by 
A. Lameere, p. 1022. 
714. Pi&rez, 0. Resorptiou phagocytaire des sperm atozoides chez les 
Tritons. C.R. Soc. Biol, lvi, pp. 783, 784. 
715. & Gendre, E. Sur l’ovog^nese du Branchellion. C.R. Soc. 
Biol, lvii, pp. 605, 606. 
716. Perrier, E. Les forces physiques et l’heredit^ dans la production 
des types organiques. Rev. Scient. (5) i, pp. 481-489. 
717. Peter, K. Einiges iiber die Gastrulation der Eidechse. Sechste 
Mitteilung zur Entwicklungsgeschichte der Eidechse. Arch, rriikr. 
Anat. lxiii, pp. 659-700, pis. xxxi, xxxii. 
718. Petersen, W. tjber indifferente Charaktere als Artmerkmale. Biol. 
Centrbl. xxiv, pp. 423-431 and 467-473. 
Relates to a review of his previous work by Jordan and concludes that 
physiological considerations must be included in discussions as to the 
origin of species. 
