CHAPITRE XVI 



La variation 



Anonyme. The cause of Mongolian Imbecillity. (Journ. of Heredity r 

 IX, janv., 23.) [277 



Anonyme. More remarquable button-balls. (Journ. of Heredity, IX, N 1, 

 48.) [281 



Anonyme. Country versus city boys. A diffrence in environment shownto 

 be without effect on gnerai health. (Journ. of Heredity, IX, novembre, 

 306.) [280 



Aumiot (J.). Les mutations g emmair es culturales des Solanum tubrifres 

 sauvages. (Thses Fac. Se. Paris, 156 pages, 129 fig.). [275 



Bachmann (E.). \\ ie verhalten sich Holzund Rindenflechten beim Ueber- 

 gang aufKalk? (Ber. d. deutsch. bot. Ges., XXXVI, 528-539, 12 fig.) [281 



Bisset (Peter). Proliflcation in a double-flowered form of ' Calendula offv- 

 cinalis. (Journ. of Heredity, IX, novembre, 323-325, 2 fig.) [278 



Breitenbecher (J. K.). The relation of water to the behavior ofthe Potato 

 beetle in a dsert. (Carnegie Inst. of Washington, Public., N 263, 341- 

 384.) (278 



Brown (B. S.). Fruiting of Apple trees every other year. (Journ. of Here- 

 dity, IX, novembre, 304-306, 1 fig.) [280 



Brown (Thos. W.). Orange like fruit from a Lemon tree. (Journ. of 

 Heredity, IX, novembre, 308, 3 fig.) [276 



Buscalioni e Baldrati. Le acacie a parasole dlie regioni aride dlia 

 Dankalia, Abissinia ed Eritrea. (Bollett. dell' Accad. Gioenia, fasc. 4041, 

 4-5, 1917.) [276 



Caullery (M.) et Mesnil (F.). Dimorphisme volutif chez les Anne'lides 

 polychtes. (C. R. Soc. Biol., LXXXI, 707-709.) [Rappel des faits de poly- 

 morphisme se rattachant ceux prsents dans Ann. Biol., XXII, p. 286 



Daniel (L.). Action du climat marin sur la floraison de VAsphodelus 

 luteus. (C. R. Ac. Se, CLXVII, 458.) [282 



Dewitz (J.). Ueber kunstliche Aufhebung des Spi7inens der Arthro- 

 poden. (Zoolog. Anz., L, 27-30.) [279 



Dufrnoy (J.). Les mutations gemmaires. (Rev. Gen. Se, XXIX, 

 227.) [275 



Embody (G. C). Artiflcial hybrids bettveen pike and pickerel. (Journ. of 

 Heredity, IX, N 6, octobre, 253-256, 2 pi.) [282 



Freeman (George F.). Producing bread making wheals for ivarm cli- 

 mates. (Journ. of Heredity, mai-juin, 211-226, 5 fig.) [281 



