166 GENETICS [Box. Absts., Vol. X, 



1077. PopENOE, Paul. [Rev. of: Gager, C. Stuart. Heredity and evolution in plants. 

 U X W cm., xi -\- 265 p., 113 fig. P. Blakiston's Son & Co. : Philadelphia, 1920 (see Bot. Absts. 

 6, Entry 1672; 7, Entries 178, 1610; 8, Entry 1079).] Jour. Heredity 12: 198. 1921. 



1078. PoPENOE, Paul. Measuring human intelligence. [Rev. of: Goddard, Henry 

 Herbert. Human efficiency and levels of intelligence. 128 p. Princeton Univ. Press: Prince- 

 ton, 1920.] Jour. Heredity 12: 231-236. 1921. 



1079. PoPENOE, Paul. [Rev. of: Stoddard, Lothrop. The rising tide of color. 320 

 p., 3 maps. Charles Scribner's Sons: New York City, 1920.] Jour. Heredity 12: 204. 1921. 



1080. PoPENOE, Wilson. The Colombian berry or giant berry of Colombia. Jour. Hered- 

 ity 11: 195-203. Frontispiece, 4 fig- 1920. — In 1914 the giant blackberry of Colombia was 

 introduced into the XJ. S. A. from El Penon, Colombia. In 1920 the author studied the species 

 in its native habitat, and concluded that the Colombian berry is probably closely related to 

 Rubus roseus, and best adapted to the southern and western (U. S. A.) states. Though fair 

 to good in quality, the berry will probably prove most useful for work in hybridization because 

 of its great size, the berries often measuring 2.5 X 1.5 inches. It is suggested that the name 

 be changed from "giant blackberry of Colombia" to "Colombian berry." The fruit, plant 

 and cultural requirements are described. David Fairchild appends a note referring to 

 accounts of the berry by the explorers in Col. Roosevelt's expedition to South America in 

 1914.— L. R. Detjen. 



1081. Roberts, Elmer. Polydactylism in cattle. Jour. Heredity 12: 84-86. 5 ^gr. 1921. 

 — Three generations of polydactylism in cattle are reported, the abnormality appearing to 

 behave as a dominant Mendelian unit. — Sewall Wright. 



1082. Safford, W. E. Datura — an inviting genus for the study of heredity. Jour. Heredity 

 12: 178-190. Fig. 10-16. 1921. — Species and varieties in the genus Datura are distinguished, 

 and the probable origin of several forms and their use as narcotics, poisons, and aphrodisiacs 

 are discussed. Mention is made of previous genetic studies within the species D. Stramonium, 

 and several interspecific crosses are suggested as likely to yield results of interest to plant 

 breeders. — A. F. Blakeslee. 



1083. Savelli, R. Anomaliedellaplantuleeanomaliedigerminazione di nicotiana. [Anom- 

 alous condition in seedlings and the germination of tobacco.] Nuovo Gior. Bot. Ital. 27: 

 129-153. 1920. — A study of 450,000 seedlings showed as many as 2,800 cases of divergence from 

 the normal in the development of the cotyledons. The tricotyledonous condition was most 

 common. The work is to show the great teratological variability of a given species. Although 

 the author's observations are numerous, he believes they can not qualitatively and quan- 

 titatively demonstrate the true state of affairs. He promises to take up later, more ex- 

 tensively and with better material, the interesting study of teratological heredity and its 

 problems. — Ernst Arischwager. 



1084. ScHXJRHOFP, P. N. tJber die Teilung des generativen Kerns vor der Keimung des 

 Pollenkorns. [Division of the generative nucleus preceding germination of the pollen grain.] 

 Arch. Zellforsch. 15: 145-159. 1 pi. 1919. — In Sagittaria sagittif alia and Melandriu7>i album 

 the cell wall between the vegetative nucleus and the primary generative nucleus disappears, 

 and the cytoplasm becomes confluent. In Sambucus racemosa no cell wall is formed between 

 these 2 nuclei. In no case was a special layer of cytoplasm found around either of the 2 

 ultimate generative nuclei. — John Belling. 



1085. Setchell, W. A., T. H. Goodspeed, and R. E. Clausen. A preliminary note on 

 the results of crossing certain varieties of Nicotiana tabacum. Proc. Nation. Acad. Sci. 

 [U. S. A.] 7: 50-56. 1921. — The Mendelian results of 3 crosses between certain varieties of to- 

 bacco selected as fundamental varieties, or ' 'stem forms, "are described. The investigation seeks 

 to unravel the problem of the origin of the numerous cultivated forms by determining which 



