38 Gen . Sub. 
I. GENERAL SUBJECTS. 
619. [Patten, W.] On the structure and classification of the Tremata- 
spidce. Amer. Natural, xxxvi, pp. 379-393. 
Relations of Vertebrates and Invertebrates. Criticised by C. R. Eastman, 
t. c. pp. 505-507. 
620. Patterson, R., Carpenter, G. H., Halbert, J. N., Johnson, W. F., 
Nichols, A. R., Orr, H. L., Praeger, R. L., Sharff, R. F., Welch, R. 
& Wright, J. Zoology, pp. 148-242 [in] A Guide to Belfast and the 
Counties of Down and Antrim. Belfast, 1902, 283 pp. 
621. *Pauli, W. Der Kolloidale Zustand und die Vorgange in der leben- 
digen Substanz. Braunschweig, 1902, 8vo, 32 pp. [ex Zool. Anz. xxv, 
Bibl. p. 557]. 
622. *Pauly, A. Wahres und Falsches an Darwin’s Lehre. Miinchen, 
1902, 18 pp. 
Summary, Allg. Zeitschr. Ent. vii, p. 539. 
623. Pearl, Raymond. The movements and reactions of fresh-water 
Planarians : a study in animal behaviour. Quart. J. Micr. Sci. xlvi, 
pp. 509-714. 
624. Pearson, K. Variation of the egg of the sparrow ( Passer domesticus). 
Biometrika i, pp. 256, 257. 
625. -. On the systematic fitting of curves to observations and 
measurements. Part 1. T. c. pp. 265-303. Part 2. Op. cit. ii, 
pp. 1-23. 
626. -. On the modal value of an organ or character. T. c. pp. 260, 
261. 
627. -. On the fundamental conceptions of biology. T. c. pp. 320-344. 
628. -. Mathematical contributions to the theory of evolution, xi. 
On the influence of natural selection on the variability and correlation 
of the organs. P. R. Soc. London lxix, pjD. 330-333. 
629. - . On the correlation of intellectual ability with the size and 
shape of the head. (Preliminary notice.) T. c. pp. 333-342. 
For Part ii. see Lee, Lewenz & Pearson (480). 
630. -. Note on Mr Bateson’s paper “heredity, differentiation and 
other conceptions of biology” : a consideration of Prof. Karl Pearson’s 
paper “on the principle of homotyposis.” T. c. p. 450. 
- . [See also Lee, Lewenz & Pearson (480).] 
P£e, P. van. [See Van Pee.] 
631. Peebles, Florence. Further experiments in regeneration and 
grafting of Hydroids. Arch. Entwickmech. xiv, pp. 49-64. 
Summary by Bergh, Zool. Centrlbl. 1902, p. 770. 
632. *P£rez, C. Contribution k l’etude des metamorphoses. Thkse. 
Lille, 1902, 8vo, 239 pp. 
Review, Rev. Scient. xvii, p. 754. 
633. Perkins, H. F. The development of Gonionema murbachii. P. Ac. 
Philad. liv, pp. 750-790, pis. xxxi-xxxiv. 
634. Perrier, E. La tachygenkse. Verh. Congr. Zool. v, pp. 996-1000. 
635. -. La fixation hereditaire des attitudes avantageuses. T. c. 
pp. 336-338. 
