26 Gen. Sub. i. general subjects. [1904] 
414. Holmes, S. J. The problem of form regulation. Arch. Entwick- 
mech. xvii, pp. 265-305, 3 figg. 
415. Holmgren, Emil. Beitrage zur Morphologie der Zelle. ii. Ver- 
schiedene Zellarten. Anat. Hefte. Arb. xxv, pp. 97-208, pis. 4-17, 
18 text-figg. 
416. Holmgren, N. Zur Morphologie des Insektenkopfes. i. Zum 
inetameren Aufbau des Kopfes der ChironomusVd.Y\Q. Zeitschr. wiss. 
Zool. Ixxvi, pp. 439-477, i^ls. xxvii, xxviii. 
417. HooKHAM, G. The origin of life. [Letters.] Nature Ixxi, p. 9 and 
p. 101. 
418. HowoRTH, H. H. The uncertainties of science. Tr. South. Eastern 
Socc. 1903, pp. 1-21. 
Hubbard, Marian E. [See Davenport & Hubbard (232).] 
419. Hubrecht, a. a. W. Hugo de Vries's theory of mutations. Pop, 
Sci. Monthly Ixv, pp. 205-223. 
420. . On the relationship of various invertebrate Phyla. P. Ac. 
Amsterdam 1904, pp. 839-846. 
421. . Die Abstammung der Annelideii und Chordaten und die 
Stellung der Ctenophoren und Plathelminthen im System. Jena. 
Zeitschr. xxxix, pp. 151-176. 
422. . The trophoblast. A rejoinder. Anat. Anz. xxv, i^p. 106-110. 
423. . The trophoblast : a rejoinder. Science xx, pp. 367-370. 
424. Hunter, S. J. On the morphology of artificial parthenogenesis in 
the Sea-urchin, Arhacia. [Abstract.] Science xix, pp. 213, 214. 
425. Hunter, W. Some reactions of Mneraiopsis leydyi (A. Ag.). Biol. 
Bull, vi, p. 324. 
426. Hurst, C. C. Mendel's discoveries in heredity. Tr. Leicester Soc. 
viii, pp. 121-134. 
427. . Experiments on heredity in rabbits. Rep. Brit. Ass. 1904, 
p. 592. 
428. Hutton, F. W. Index faunas Novoe Zealandiae. London, 1904, 8vo, 
viii + 372 pp. 
Introduction ; historical ; dissertation on the region : pp. 1-23. 
Review, Nature Ixx, p. 78. 
429. . Bering's theory of heredity and its consequences. Nature 
Ixix, pp. 366-369. 
430. & Drummond, J. The animals of New Zealand : an account 
of the Colony's air-breathing Vertebrates. Christchurch and London, 
1904, xiv + 381 pp. illustrated. 
Review, Nature Ixxi, p. 198. 
431. Hyde, I. H. Differences in electrical potential in developing eggs. 
Amer. J. Physiol, xii, pp. 241-275. 
432. Iwanow, p. Ueber die Regeneration der Segmente bei den Poly- 
chceten. Protok. St. Peterb. Obshch. xxxv, 1904, pp. 254-261 [in Russian] 
and summary in German, pp. 307-309. 
433. Jackson, R. T. Charles Emerson Beecher [with portrait and biblio- 
graphic list]. Amer. Natural, xxxviii, pp. 407-426. 
434. Jacobi, a. Die Bedeutung der Farben im Tierreiche. Gemeinverst. 
Darwinist. Vortr., Breitenbach, Heft, xiii, 56 pp. 
