126 
Notices mid Bibliography 
(65) Hebert, p. Z., M.D. Killing of the Unfit, and the Transmissibility of Acquired 
Characters. General Practitioner, July 6, Nov. 16 and 23, 1907. 
Of no interest to the biometrician or to the biologist. 
(66) Herms, W. B. An Ecological and Experimental Study of Sarcophagidae with Relation 
to Lake Beach Debris. Jour. Exper. Zool. Vol. iv, pp. 45 — 83. 1907. 
Contains, inter alia, some interesting data on growth in beetles. 
(67) Heron, D. A First Study of the Statistics of Insanity and the Inheritance of the Insane 
Diathesis. Eugenics Laboratory Publications, No. ii. (Dulau & Co., London.) 
(68) HoFMANN, Karl. Der exakte Artbegriff, seine Ableitung und Anwendung. Annalen 
der Naturphilosophie, Bd. VI, S. 154—216. 
The author proceeds from an impossible definition of a species due to Heincke 
(which involves the non-existence of Quetelet's " mean man " !) to develop a theory of 
species hy which each species is represented by an M-dimensional sphere. We need 
only say that a study of actual variation in multiple correlation would have convinced 
the writer that Heincke's and his own fundamental hypothesis is invalid. 
(69) Hooker, R. H. Correlation of the Weather and Crops. Jour. Roy. Stat. Soc. Vol. lxx, 
Part 1. 1907. 
(70) Hrdlicka, a. Measurements of the Cranial Fossae. Proc. U. S. Nat. Mus., Washington, 
1907, pp. 177—232. 
" This paper deals with the absolute and relative lengths of the cerebral and 
cerebellar fossae in man and a series of animals, and with the relation of the length 
of the difl^erent fossae to the form of the skull." 
(71) Kellicott, W. E. Correlation and Variation in internal and external characters in the 
Common Toad {Bufo Lentiginosus Americanus, Le C). Journal of Experimental 
Zoology, IV, pp. 575 — 614. 
An interesting paper with one or two slight misunderstandings. Thus there is 
no difficulty whatever (as is suggested on p. 576) in calculating multiple correlations 
for 3 (or even 4) variables when the coefficients for the correlation of every pair are 
known. Again in reference to the remark on p. 610, we may say that Pearson 
starts his paper by excluding the influence of growth, and the results cited from 
Greenwood, p. 611, are largely due to correlated pathological changes, one phase of 
growth. The fact that Kellicott does not take age into account ("the subjects were 
of various ages ") renders his correlations largely ' spurious ' ; it might possibly account 
for the markedly higher correlations of the females and some light on this point 
might be olitained by correlating indices. Finally the belief that the whole of a 
small population, said to be taken in this case, is better than a random sample of 
a very much larger population is not well founded, for the total population in such a 
case may be due to comparatively few progenitors. 
(72) Kerr, A. T. Statistical Studies of the Brachial Plexus in Man. Amer. Jour. Anat. 
(Proc. Assoc. Amer. Anat.), Vol. vi, No. 3, pp. 53, 54. 1907. 
(73) Kiaer, a. N. Rapport sur la statistique de la fecondite du mariage. Bull, de ITnstit. 
internat. de statist. Londres, 1906, T. xv, livr. 2, pp. 398—401. 
(74) King, Helen Dean. Food as a Factor in the Determination of Sex in Amphibians. 
Biol. Bull. Vol. XIII, pp. 40—56. 1907. 
Shows that the sex-ratio is not significantly influenced by the character of the 
food in Bufo. 
(75) KiRKOFF, N. Recherches anthropologiques sur la croissance des el^ves de I'ficole militaire 
de S. A. R. le Prince de Bulgarie, k Sofia. Bull, et Mem. Soc. d'Anthrop. de Paris, 
1906, Ser. 5, T. vii, pp. 226—233. 
