TITLES. 
Gen. Sub. 23 
375. Jennings, H. S. Studies on reactions to stimuli in unicellular 
organisms, n. The mechanism of the motor reactions of Para¬ 
mecium. Amer. J. Physiol, ii, pp. 311-341, 15 figg. 
376. -. Studies on reactions to stimuli in unicellular organisms. 
hi. Reactions to localised stimuli in Spirostomum and Stentor. 
Amer. Natural, xxxiii, pp. 373-389, 4 figg. 
377. -. Studies on reactions to stimuli in unicellular organisms. 
iv. Laws of chemotaxis in Paramecium. Amer. J. Physiol, ii, 
pp. 355-379. 
378. -. The psychology of a Protozoan. Amer. J. Psychol, x, No. 4, 
July, 13 pp. 
379. Joly, J. An estimate of the geological age of the earth. Sci. Tr. 
R. Dublin Soc. vii, No. iii, pp. 23-66. 
380. Jordan, D. S. Foot-notes to evolution. A series of popular 
addresses on the evolution of life, with supplementary essays by 
E. G. Conklin, F. M. McFarland, J. P. Smith. 8vo, New York, 
1898, xviii + 392 pp., 6 pis. and 28 figg. [cited with asterisk in 1898]. 
381. *Joukowsky, D. Beitrage zur Frage nach den Bedingungen der 
Verrnehrung und des Eintritts der Conjugation bei den Ciliaten. 
Dissertatio. 8vo, Heidelberg, 1898, 27 pp. 
382. Jourdain, S. L’audition chez les Invertebres. Cinquantenaire Soc. 
Biol. 1899, pp. 57 & 58. 
383. Judd, S. D. The efficiency of some protective adaptations in secur¬ 
ing insects from birds. Amer. Natural xxxiii, pp. 461-484. 
384. Kaestner, S. Neuer Beitrag zur Casuistik der Doppelbildung bei 
Hfihnerembryonen. Arch. Anat. 1899, pp. 28-32, 2 figg. 
385. Kallius, E. Sehorgan. Anat. Ergebn. vii (1898), pp. 288-330, 
11 figg. 
385a. -. Sehorgan. Anat. Ergebn. viii, pp. 272-355. 
386. ^Karpov, W. Sur la division directe dans les cellules des tissus 
difierenties. C.R. xii Congr. Internat. Med. (1897), vol. ii (1899), 
pp. 101-107. 
387. Kassowitz, M. Allgemeine Biologie. Erster Band. Aufbau und 
Zerfall des Protoplasmas. 8vo, Wien, xv + 411 pp. 
388. -. Allgemeine Biologie. 2 te Bd. Vererbung und Entwicklung. 
8vo, Wien, x + 391 pp. 
389. *-. Die Einheit der Lebenserscheinungen. Wiener Med. Wochen- 
schrift Nr. 48-51, 1898; 8vo, Wien 1899, pp. 38. 
390. Kathariner, L. Versuclie fiber den Einfluss des Lichtes auf die 
Farbe der Puppe vom Tagpfauenauge (F. jo L.). Biol. Centrbl. xix, 
pp. 712-718. 
391. Keeble, F. W. & Gamble, F. W. The Colour - physiology of 
Hippolyte vanans. P. R. Soc. London lxv, pp. 461-468. 
392. Keibel, Fr. Das biogenetische Grundgesetz und die Cenogenese. 
Anat. Ergebn. vii (1898), pp. 722-792, 2 figg. 
393. Kellogg, Y. L. The Hopkins seaside laboratory. Amer. Natural, 
xxxiii, pp. 629-634. 
394. Kerr, J. Graham. Note on hypotheses as to the origin of the 
paired limbs of Vertebrates. P. Cambridge Phil. Soc. x, pp. 227-235. 
