214 PROGRESS OF MICROSCOPICAL SCIENCE. 
the same magnitude; 118 or about 8 per cent. were less than 34x, 
and 124 or nearly 9 per cent. were more than .,),, of an inch in 
diameter. The total number of corpuscles ;,5 of an inch across 
was 6, or less than one-half of 1 per cent. The total number 57,7 
of an inch in diameter was 10, or less than 1 per cent. 'The somewhat 
smaller averages of the Italian, Swedish, and Norwegian specimens 
are perhaps due to slight accidental variations in spreading out the 
layers of blood for examination, and cannot be accepted, at least 
without further research, as indicative of either personal or national 
peculiarities.” 
MicroscoricAL Contents oF ForEIGN JOURNALS. 
The following brief notices of foreign journals of interest to the 
microscopist are taken partly from ‘Nature’ and the ‘Journal of 
Botany’ (for March) : 
Morphologisches Jahrbuch, vol. ii. part 4.—On the Development of 
the Auriculo-ventricular Valves of the Heart, by A. C. Bernays.—On 
the Segmentation of the Ovum and Formation of the Blastoderm in 
Calyptrea, by A. Stecker.—On the Primitive Groove in the Chick, by 
A. Rauber. 
Revue des Sciences Naturelles, vol. v.. No. 8, December 1876.— 
Contributions to the Natural History and Anatomy of the Ephemeride, 
by N. and E. Joly; an important paper.—On Parthenogenesis in 
Bombyx mori, by Carl von Siebold.—On the Histology of the Egg, by 
A. Villot, dealing with theoretical views on the germinal vesicle and 
its history. 
Bot. Zeitung, January 1877.—H. de Vries, “On the Expansion of 
Growing Cells from Turgescence.”—M. W. Beyernick, “On Plant- 
galls.” 
Flora, January.—L. Celakovsky, “On the Morphological Struc- 
ture of Vincetoxicum and Asclepias” (tab. 1).— C. Kraus, “ On 
Relations of Turgescence to Growth-phenomena.’—A. Batalin, “ Me- 
chanism of Movements of Insect-eating Plants.’—V. A. Poulsen, “A 
New Locality for Rosanoff’s Crystals.” 
(Esterr. Bot. Zeitschr.—* On the Occurrence and Origin of Etiolin 
and Chlorophyll in the Potato.” 
Bull. Bot. Soc. France, 1873, pt. 8.—E. Mer, “ Vegetative Pheno- 
mena preceding and accompanying the fall of Leaves.’— Ripart, 
“On New or Rare Cryptogams for Centre of France.’—E. Prillieux, 
* Formation and Development of some Galls.”—E. Mer, “ Nature and 
Functions of Evergreen Leaves.”—Id., “ Effect of Immersion on 
Aérial Leaves.” . 
Nuovo Giorn. Bot. Ital.—G. Briosi, “ On the Phytoptus Disease of 
the Vine” (tab. 1). [This article we have had translated, and repro- 
duced in the present number of the ‘ M. M, J.’ |—Id., ‘‘ On the Function 
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