No. 1, November, 1921] GENETICS 21 



111. NoACK, KoNRAD LuDWiQ. [German rev. of: Correxs, C. Vererbungsversuche 

 mit buntblattrigen Sippen. III. Veronica gentianoides albocincta. IV. Die albomarmorata- 

 und albopulverea-Sippen. V. Mercurialis annua versicolor und xantha. [Genetical studies 

 with variegated races. III. Veronica gentianoides albocincta. IV. The albomarmorata and 

 albopulverea races. V. Mercurialis annua versicolor and xantha.] Sitzungsber. Preuss. 

 Akad. Wiss. Berlin 1920: 212-240. 1920 (see Bot. Absts. 8, Entry 10G8).] Zeitschr. Bot. 

 13:465-467. 1921. 



112. Ohshima, HiROSHi. Reversal of as5anmetry in the plutei of Echinus miliaris. Proc. 

 Roy. Soc. London B. 92: 108-178. 2 fig. 1921. — The author discusses experiences in rearing 

 larvae of echinoids, among which, in a small proportion of cases, the hydrocoele cavity de- 

 veloped upon the right side instead of the left, as normally is the case. In such individuals 

 the larval symmetry throughout became reversed, though the fully developed echinoid showed 

 no evident departures from the normal condition. In some cases larvae were found having 

 hydrocoeles upon both sides. The paper is largely devoted to a discussion of hypotheses to 

 explain these conditions, the one advocated being that the exceptional right-handed condition 

 is due to the early suppression of the left hydrocoele through accident (external causes). 

 The double condition results from a temporary or partial suppression of the left hydrocoele. 

 A 2nd generation was not obtained, but the author's discussion implies that the character is 

 believed to be non-hereditary. — F. B. Sumner. 



113. Pearl, R., J. W. Gowen, and J. R. Miner. Studies in milk secretion. VII. Trans- 

 mitting qualities of Jersey sires for milk yield, butter fat percentage, and butter fat. Maine 

 Agric. Exp. Sta. Bull, 281. 89-104, 105-204. 1919.— The aims of this investigation as set 

 forth by the authors are: (1) To determine the transmitting qualities of Jersey Register of 

 Merit Sires for milk production and (2) butterf at percentage. (3) To determine the net change 

 in yearly production of butterfat between the daughter's production and mother's production 

 for Jersey Registry Sires. (4) To determine the transmitting qualities of the sire's sire as 

 judged by the production of the daughters of his son in comparison with that of their dams. 

 (5) To analyze the pedigree of the superior and inferior sires of the Jersey breed. As material 

 the records for the year test of Jersey cows contained in volumes 1-5 of the Register of Merit 

 were used. — All bulls having 2 or more daughters with year records from dams with year 

 records were included. All milk records were calculated to a standard age of 8 years and all 

 fat percentages to the age of 2 years, making all records comparable. The dams are divided 

 into 4 classes in order to make allowance for the difference in their ability as producers. — 

 Three tables are given in which the 224 bulls studied are ranked according to the average 

 amount of increase of milk, per cent of fat and amount of butterfat of daughters over dams. 

 The summary shows that 105 bulls raised the milk production, 101 raised the fat percentage, 

 and 99 increased the amount of butterfat of daughters over dams. — Pedigree studies of the 

 leading bulls are included, and a comparison is also made with the lists of leading native and 

 imported sires selected by a well known breeder. — Lists of bulls are given which increased and 

 decreased the milk and butterfat percentage of their daughters. This is followed by a thor- 

 ough study of the ancestry of these superior and inferior transmitting sires to determine their 

 inbreeding and relationship, and the amount of Island and American stock in the male and 

 female sides of the pedigree. There are 28 superior and 47 inferior sires in the group studied 

 and the inferior sires are slightly more inbred than the superior group. — It was also found 

 that all animals which appeared in the pedigrees of the superior sires on the male side more 

 than 4 times or on the female side more than 3, also had appearances in the pedigrees of the 

 sires inferior in their transmitting qualities. — A literature list and complete tables of raw 

 data are presented in a special supplement to this bulletin. — M. H. Fohrniaa. 



114. Pearl, Raymond. A further note on war and population. Science 53: 120-121. 

 i fig. 1921. — Vital statistics are presented showing that the vital index, 100 X deaths divided 

 by births, for Vienna, England and Wales, and the U. S. A. reached a high point in 1918, drop- 

 ping sharply at this point. The transitory effect of war on the death-birth ratio is empha- 

 sized. — E. M. East. 



