TITLES. 
Gen. Sub. 25 
366. Johnston, J. B. The origin of the heart endothelium in Amphibia. 
Biol. Bull, v, pp. 28-34. 
367. Jolly, J. Sur la duree de la vie et de la multiplication des cellules 
animales en dehors de l’organisme. C.R. Soc. Biol. 1903, pp. 1266- 
1268. 
368. Jordan, D. S. The types of Linnsean genera. Science xvii, pp. 627, 
628. 
369. Jordan, K. Bemerkungen zu Herrn Dr Petersen’s Aufsatz: 
Entstehung der Arten durch physiologische Isolierung. Biol. Centrbl. 
xxiii, pp. 660-664. 
370. *Joseph, H. Der Begriff des Individuums in der Zoologie. Yortr. 
Verb. nat. Kennt. xii, Heft 12, 41 pp. [From Zool. Anz. Bibl. xxvii, 
p. 164.] 
Julin, C. [See Hertwig, O. (321A).] 
371. K., A. H. [Review of] Dr M. v. Lenhossek, das Problem der 
geschlechtsbestimmenden Ursachen. [Zool. Rec. xxxix, Gen. Sub., 
Lenhossek (489).] Biol. Centrbl. xxiii, pp. 318-320. 
373. Keeble, F. & Gamble, F. W. The colour-physiology of the higher 
Crustaceans. Phil. Trans. 196b, pp. 295-388. 
. [See also Gamble & Keeble (257).] 
374. Keibel, F. Ueber den Entwickelungsgrad der Organe in den 
verschiedenen Stadien der embryonalen Entwickelung der Wirbeltiere. 
[in] Hertwig Handb. Entwickel. Wirbeltiere iii, 3, pp. 133-144 
{incomplete]. 
. [See also Roux (648).] 
375. Keissler, K. von. t7ber das Plankton des Hallstatter Sees in 
Oberosterreich. Verh. Ges. Wien liii, pp. 338-348. 
376. Kelvin, Lord. Animal thermostat. Nature lxvii, 26 Feb. 1903, 
pp. 401, 402. 
377. Kemna, A. Les caract&res g^n^raux des Vertebras. Bull. Soc. 
malac. Belgique 1903, pp. xcvii-cvii. 
378. . Les caract&res structuraux de la coquille des Foraminifkres 
flottants. T. c. pp. cix-cxxvii. 
379. & Lameere, A. Discussion sur la position systematique des 
Ctdnophores. T. c. pp. lxxix-xcvi. 
Kennedy, C. [See Eigenmann & Kennedy (219).] 
380. Kesteven, H. L. Notes on Prosobranchiata. No. iii — the neanic 
shell of Melo diadema Lamk. and the definition of the nepionic stage 
in the Gasteropod mollusc. P. Linn. Soc. N. S. Wales 1903, pp. 443- 
452. 
381. Ktdd, W. The direction of hair in animals and man. London, 1903, 
8 vo, pp. xii -f 154. 
382. King, Helen D. The effects of heat on the development of the 
toad’s egg. Biol. Bull, v, pp. 218-232. 
383. . The formation of the notochord in the Amphibia. ' Op. cit. iv, 
pp. 287-300. 
384. . Further studies on regeneration in Hydra viridis. Arch. 
Entwickmech. xvi, pp. 200-242, pis. iv-vi. 
Abstract by Bergh, Zool. Zentrlbl. x, p. 879-882. 
