TITLES. 
Prot. 33 
497. Voigt, M. Die vertikale Vertheilung des Planktons im Grossen 
Ploner See und ihre Beziehungen zum Gasgehalt dieses Gewassers. 
Forschber. Plon xii, pp. 115-144, 1 fig. and 1 table. 
498. V ujllemin, P. Sur la denomination de 1’agent presume de la 
syphilis. C.R. Ac. Sci. cxl, pp. 1567 & 1568. 
Wade, H. [See Robertson, W. F. & Wade (381).] 
499. Walton, L. B. Actinolophus minutus , a hew Heliozoan, with a 
review of the species enumerated in the genus. Ohio Natural, v, 
pp. 261-263, 1 text-fig. 
500. *Wasielewski, T. v. Studien und Mikrophotogramme zur Kennt- 
niss der pathogenen Protozoen. Heft. I. Leipzig (A. Barth.), 8vo, 
(viii + 118) pp., 7 pis., 24 text-figg. 1904. Price 6 mks. 
501. Wellman, F. C. Preliminary note on a Trypanosome found in the 
blood of an African dove ( Treron calva). J. trop. Medicine viii, 
p. 285, 1 text-fig. 
502. Wesenberg-Lund, C. A comparative study of the Lakes of Scotland 
and Denmark. P. R. Soc. Edinb. xxv, pp. 401-448, 2 pis. 
. [See also Ostenfeld, C. H. & Wesenberg-Lund (328).] 
503. West, G. S. Notes on some Scottish freshwater Rhizopods and 
Heliozoa. Ann. Scott. Nat. Hist. 1905 (No. 64), pp. 89-94, 
1 text-fig. 
504. White, H. J. O. & Treacher, L. On the age and relations of the 
phosphatic chalk of Taplow. Quart. J. Geol. Soc. lxi, pp. 461-494. 
[Remark on the occurrence of Nodosaria zippei.\ 
Williams, H. W. [See Lewis, J. & Williams (263).] 
605. Wojcik, M. K. Das Unteroligociin von Riszkania bei Uzsok. 
(Infraoligoc&ne de Riszkania prfes de Uzsok.) Bull. Ac. Cracovie 
1905, pp. 244-263. 
606. Wolfenden, R. N. Biscayan Plankton collected during a cruise of 
H.M. “ Research,” 1900. Part vi. The colloid Radiolaria. Tr. 
Linn. Soc. London x, pp. 131-135. 
507. Woodruff, L. L. An experimental study on the life-history of 
Hypotrichous Infusoria. J. exp. Zool. ii, pp. 585-632, 3 pis. and 
12 text-figg. 
508. . Physiological and morphological changes during 860 genera- 
tions of Oxytricha fallax. Science xxi, p. 270. 
509. Wooster, L. C. Do Rhizopods die a natural death ? Science xx 
(1904), p. 650. 
The case of oceanic Foraminifera {Globig evince). 
510. Wright, J. Lower Greensand Foraminifera from Little Coxwell, 
near Faringdon. Geol. Mag. (5) ii, pp. 238 & 239. 
Wurtz, — . [See Brumpt, E. & Wurtz, — (57).] 
511. Zacharias, O. Hydrobiologische und fischereiwirthschaftliche Beo- 
bachtungen an einigeu Seen der Schweiz und Italiens. Forschber. 
Plon xii, pp. 169-302, 18 text-figg. 
512. . Beobachtungen liber das Leuchtvermogen von Ceratium 
tripos. T. c. pp. 316-330. [See 11 . b. 3.] 
513. . Beobachtungen liber das Leuchtvermogen von Ceratium 
tripos (Miill.). Biol. Centrbl. xxv, pp. 20-30. 
1905. [Vol. xlii.] 
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