RECENT ADVANCES IN SCIENCE 569 



fixation and staining that not merely show these bodies, but 

 also enable them to be differentiated from one another. The 

 same author, in conjunction with Woodger, deals with an allied 

 subject in a paper " On the Relationship between the Formation 

 of Yolk and the Mitochondria and Golgi Apparatus during 

 Oogenesis " {Jour. Roy. Micro. Soc, June 1920). The origin and 

 development of these bodies are here studied more particularly 

 as they occur in vertebrates. The same journal also contains 

 a paper on " Methods for the Demonstration of the Golgi 

 Apparatus in Nervous and other Tissues," by Da Fano. 



Harvey, in " A Review of the Chromosome Numbers in the 

 Metazoa II " {Jour. Morph., vol. xxxiv, no. i, June 1920). 

 provides a list of all the chromosome numbers recorded from 

 Annelida, Arthropoda, and Coelenterata from January 19 16 — 

 December 191 8, thus bringing a previous list up to date. It 

 also tabulates those of all the other Metazoa from 1878 — 

 December 191 8. 



Other papers include : 



Allen, " A Quantitative and Statistical Study of the Plankton of the San 

 Joaquin River and its Tributaries in and near Stockton, California, in 191 3 " 

 {Univ. Cal. Pub., Zool., vol. xxii, June 1920) ; Carleton, " Observations on 

 an Intra-nucleolar Body in Columnar Epithelium Cells of the Intestine " 

 (Qtiari. Jour. Micro. Set., vol. Ixiv, pt. 3, March 1920) ; Cowdry, " Anatomy 

 in Japan " {Anat. Rec, vol. xviii, no. 2, March 1920) ; Firket, " On the Origin 

 of the Germ Cells in Higher Vertebrates " {ibid., no. 3, April 1920) ; Gamble 

 and Hitchcock, " The Use of Stereoscopic Roentgenograms in studying the 

 Circulatory System of Vertebrates" {ibid., no. 2, March 1920); Gough, "A 

 Method of Injecting the Blood-vessels for Roentgenological Studies and 

 simultaneously Embalming " {ibid.) ; Grey, " The Effects of Ions upon 

 Ciliary Movement" {Quart. Jour. Micro. Sci., vol. Ixiv, March 1920) ; Loeb, 

 " On the Recreation of Tissues towards Synogenesio- Homo- and Hetero- 

 toxins, and on the Power of Tissues to discern between Different Degrees of 

 Family Relationship," and " The Individuality-differential and its Mode of 

 Inheritance " (both in Amer. Nat., vol. liv, Jan. 1920 ); Pearl, " Certain 

 Evolutionary Aspects of Human Mortality Rates " {ibid.) ; Reighard, " The 

 Storage and Handling of Wall Charts " {Anat. Rec, vol. xix, no. i, June 1920) ; 

 Souchon, " A New Permanent Solution for the Preservation of Anatomic 

 Preparations, the Souchon Solution of Calcium Chloride " {ibid., no. 4, May 

 1920) ; and Sumner, " Geographic Variation and Mendelian Inheritance" 

 {Jour. Exp. Zool., vol. xxx, no. 3, April 1920). 



ANTHROPOLOGY. By A. G. Thacker, A.R.C.Sc, Zoological Laboratory, 

 Cambridge. 



In the last number of Science Progress I referred to an article 

 by Mr. M. C. Burkitt, which had appeared in the Proceedings 

 of the Prehistoric Society of East Anglia (vol. iii, pt. 2, 1919—20), 

 and dealt with the highly interesting and important subject of 

 the correlation of the Glacial and Interglacial strata of Great 

 Britain, and especially of East Anglia, with the Glacial and 

 Interglacial strata on the Continent ; and more particularly 



