VARIATION. 553 



Blaringhem (L..). Mutantes et Hybrides. (Ann. Se. nat. Rot., Sr. X, 3, 

 p. I-XXXI, 1921.) [Mise au point 



Bridges (Calvin B.). The oriffin of variations in sexual and sex-limited 

 charaeters. (Amer. Natur., LVI, 51-63, 1922.) [55s 



Cockerell (T. D. A.). Rudbeckia and Aquilegia. (Nature, 26 aot 1922, 

 278.) [565 



Crozier (W. J.). On color variations in Chitons. (Amer. Natur., LVI, 

 189-191,1922.) [Variations 



de couleur des valves de la coquille du Chiton Chtopleura, soit sur de 

 simples valves, soit sur toutes les valves simultanment. L. Cunot 



Cunot (L.) et Mercier (L.). La perte de la facult du vol chez les Dip- 

 tres parasites. (C. R. Ac. Se, CLXXV, 433, 1922.) [564 



Delachaux (Th.). Un polychte d'eau douce cavernicole. (Bull. Soc. neu- 

 chteloise se. nat., XLV, 1-11, 1921.) [564 



Emerson (R. A.). The nature of bud variations as indicated by their 

 mode of inheritance. (Amer. Natur., LVI, 64-79, 1922.) [555 



Gerould(John H.). Blue-yrecn caterpillars : the origin and ecology of a 

 imitation in hemolymph color in Colias (Eurymus) philodica. (Journ. 

 Exper. Zool., XXXIV, 385-416, 1 fig., 1 pi., 1921.) [554 



a) Guyer (M. F.). Serological reactions as a probable cause of variations. 

 (Amer. Natur., LVI, 80-96, 1922.) [557 



b) Orthoge?iesis and serological phenomena. (Amer. Natur., LVI, 



116-133, 1922.) [561 



Harris (J. Arthur) and Govaerts (Albert). Note on assortative mating 

 in Man ivith respect to head size and head form. (Amer. Natur., LVI, 

 381-3-3, 1922.) [556 



Henderson (L. J.). Orthogenesis front the stand point of the biochemisl. 

 (Amer. Natur., LVI, 97-104, 1922.) [562 



Hubbs (Cari L.). Variations in the number of vertebrx and other meristic 

 charaeters of Fishes correlated with the temprature o fumier during deve- 

 lopment. (Amer. Natur., LVI, 360-372, 1922.) [565 



Jennings (H. S.). Variation in uniparental reproduction. (Amer. Natur., 

 LVI, 5-15, 1922.) [566 



Lipman (Chas. B.). Orthogenesis in Bacteria. (Amer. Natur., LVI, 105- 

 115, 1922.) [561 



Maillefer (A.). Variations des cygnes du Lman. (Bull. Soc. vaud. se. 

 nat., 54, 144-154, 1921.) [556 



Mercanton (P. L.). Araignes cavernicoles des Mines de sel de Bex. 

 (Bull. Soc. vaud. se. nat., 54, 11, 1921.) [564 



Muller (H. J.). Variation due to change in the individual gne. (Amer. 

 Natur., LVI, 32-50, 1922.) [559 



Osborn (Henry Fairfeld). Orthogenesis as observed from paleontological 

 vidence beginning in the year 1889. (Amer. Natur., LVI, 134-143, 1922.) 



[562 



Pictet (Arnold). Action du milieu et hrdit. (Comptes rend, des 

 sances Soc. phys. et hist. nat. de Genve, 38, 64-07, 1921.) [563 



