108 Mutations and Evolution. 



Gates, R. R., 19I2a. Parallel mutations in (Enothera biennis. 

 Nature, 89 : 659-660. 



1912b. Somatic mitoses in CEnothera. 



Ann. of Botany, 26 : 993-1010, pi. 1. 



1913. A contribution to a knowledge of the mutating CEnotheras. 



Trans. Linn. Soc., 2nd Ser, Botany, Vol. 8, Part I., 



pp. 67, pis. 6. 

 191 la. Breeding experiments which show that hybridization 



and mutation are independent phenomena. Zeitschr. 



f. Abst. u. Vererb. 11 : 209-279, figs. 25. 

 1914b. Some CEnotheras from Cheshire and Lancashire. 



Ann. Mo. Bot. Gardens 1 : 883-400, pis. 3. 



and Nesta Thomas, 1914. A cytological study of (Enothera mut. 



lata and CE. mut. semilata in relation to mutation. 

 Quart. Journ. Micro. Sci. 59 : 523-571, pis. 3, figs. 4. 

 1915a. The Mutation Factor in Evolution, with particular 



reference to CEnothera. 

 London : Macmillan, pp. 353, figs. 114. 

 1915b. On successive duplicate mutations. 



Biol. Bull. : 29: 204220. 

 1915c. Heredity and mutation as cell phenomena. 



Amer. Journ. Bot. 2 : 519-528. 

 1915d. On the nature of mutations. 



Journ. of Heredity 6 ; 99-108, figs. 7. 

 1915e. On the origin and behaviour of (Enothera rubricalyx. 



Journ. of Genetics 4 : 353-360. 

 1915f . On the modification of characters by crossing. 



Amer. Nat. 49 : 562-569. 



1916. On pairs of species. Bot. Gazette 61 : 177-212, figs. 12. 

 1917a. Vegetative segregation in a hybrid race. 



Journ.of Genetics 6 : 237-253, pi. 1. 



191 7b. A systematic study of the North American genus 



Trillium, its variability, and its relation to Paris and 

 Medeola Ann. Mo. Bot. Garden 4 ; 43-92, pis. 3. 

 1917c. The mutation theory and the species concept. 



Amer. Nat. 51 : 577-595, fig. 1. 



1918a. A systematic study of the North American Melanthacese 



from the genetic standpoint. 

 Journ. Linn. Soc., Botany 44: 131-172, pi. 1. 



1918b. A systematic analytical study of certain North American 



Convallariaceae, considered in regard to their origin 

 through discontinuous variation. 

 Ann. of Botany 32 : 253-257. 

 Geerts, J. M., 1907. Uber die Zahl der Chromosomen von (Enothera Lamarchiana. 



Ber. deut. bot. Gesells. 25 : 191-195, pi. 1. 



Glen, Edith H., 1918. A revision of certain points in the early development 

 of Peripatus capensis. Quart. Journ. Micro. Sci. 63 : 

 283-292, pi. 1. 



Gudernatsch, J. F., 1914. Feeding experiments on tadpoles, II. A further 

 contribution to the knowledge of organs with internal 

 secretion. Amer. Journ. Anat. 15 : 431-480, pis. 2. 

 Gulick, J. T., 1905. Evolution, racial and habitudinal. Carnegie Inst. of 



Wash., Publ. No. 25, pp. 269, pis. 3. 



Hance, Robert T., 1918. Variations in the number of somatic chromosomes 

 in (Enothera scintillans, De Vries. Genetics 3 : 225- 

 275, pis. 7, figs. 5. 



Harper, R. A., 1918. Organization, reproduction and inheritance in Pediastrum, 

 Proc. Amer. Phil. Soc. 57: 375-439, pis. 2, figs. 35. 



Harrison, J. W. Heslop, 1920a. Genetical studies in the moths of the Geo- 

 metrid genus Operabia (Oporinia) with a special 

 consideration of melanism in the Lepidoptera. 

 Journ. of Genetics 9 : 195-280, figs. 13. 



