TITLES. 
Gen . Sub. SI 
616. Olfers, von. Fliigellose Arthropoden des Bernsteins in ihrer Bezie- 
hung zur Descendenztheorie. Schr. Ges. Konigsb. 1905, pp. 100-104. 
617. Olsson-Seffer, P. A biological station in Greenland. Science xxi, 
pp. 189-191. 
518. Orchard, II. L. Science and evolution. J. City London Soc. ix, 
pp. 11-19. 
519. *Ortmann, A. E. Origin of the deep sea fauna. Internat. Geogr. 
Congr. viii, pp. 618-620. 
Abstract, Zool. Zentrlbl. xiii, pp. 302, 303. 
520. Osborn, H. F. The present problems of paleontology. Pop. Sci. 
Month, lxvi, pp. 226-242. 
521. Ostenfeld, C. H. & Wesenberg-Lund, C. A regular fortnightly 
exploration of the Plankton of the two Icelandic Lakes, Thingvallavatn 
and Myvatn. P. R. Soc. Edinb. xxv, 1905, pp. 1092-1167, 3 plates. 
Abstract by Zschorke, Zool. Zentrlbl. xiii, pp. 233-236. 
522. Ostroumoff, A. Zur Entwicklungsgeschichte des Sterletts ( Acci - 
penser ruthenus). Zool. Anz. xxix, pp. 515-517. 
523. Ostwald, W. Zur Theorie der Wissenschaft. Ann. Naturphilos. iv, 
pp. 1-27. 
. [See also Fischer & Ostwald (223).] 
524. *Overton, F. Nature study. A pupil’s text-book. New York, 
1905, 142 pp. 
Noticed, Amer. Natural, xxxix, p. 601. 
525. P. La production de lumi&re par les animaux marins de profondeur. 
Rev. Scient. (5) T. iv, pp. 247, 248, fig. 17. 
Note on recent works. 
626. Pacaut, M. Ueber Amitose und vielkernige Zellen in mehrschichtigen 
Epithelien bei Saugetieren. Verh. auat. Ges. 1905, pp. 144, 145. 
527. . Sur quelques formes anomales de l’amitose dans les epithe- 
liums de rev6tement des Mammif&res. C.R. Ac. Sci. cxl, pp. 676-678. 
528. & Vigier, P. Notes cytologiques sur les glandes salivaires 
& Helix pomatia. i. Formations chromophiles (ergastoplasme, chon- 
driomites). n. Maturation et dissolution des grains de zyraog&ne. 
Yerh. anat. Ges. 1905, pp. 151-153. 
529. Packard, A. S. Change of color and protective coloration in a flower- 
spider ( Misumenia vatia Thorell). J. N. York Ent. Soc. xiii, pp. 85- 
96). 
530. Parker, G. H. The movements of the swimming-plates in Cteno- 
phores with reference to the theories of ciliary metachronism. J. exp. 
Zool. ii, pp. 407-423. 
531. *Pauly, A. Darwinismus und Lamarckismus. Entwurf einer psy- 
chophysischen Teleologie. Munchen, 1905, 8vo, 335 pp. [from Zool. 
Anz. xxx, Lit. p. 158]. 
632. Pavesi, P. Sul Prof. Cav. Leopoldo Maggi. Boll. Mus. Torino xx, 
No. 489, 6 pp., portrait. 
533. Pearl, R. & Burr, Mary J. A statistical study of conjugation in 
Paramecium. [Abstract.] Rep. Michigan Ac. vi, pp. 184, 185. 
534. & Dunbar, F. J. Variation and correlation in Arcella. 
[Abstract.] Op. cit. v, pp. 202-204, 1 text-fig. 
1905. [Vol. xml] b 7 
