46 GENETICS [BoT. Absts., Vol. VIII, 



300. Moon, Virgil H. Heredity as a factor in the etiology of neoplasms. Medical Rec. 

 97: 14-16. 1920. — Author records an autopsy on a man who died of carcinoma of the bladder. 

 This man's brother, father, grandfather, and one uncle had likewise died of carcinoma.^ 

 He also cites a case of a man who died of pneumonia. The father, brother, and one uncle 

 had each died of cancer. The deceased man had no evidence of cancer, but revealed on 

 autopsy a well developed carcinoma of the stomach. — 'A short review is given of the observa- 

 tions and statistics of Williams, Butlin, Munn, Warthin, Ewin and Maud Slye on the 

 heredity of cancer and other tumors in man and other animals. The conclusion is reached 

 that a tumor-producing potentiality is an hereditarj'^ trait and that the conditions which are 

 assigned by pathologists as possible causes of cancer probably act merely as exciting or deter- 

 mining factors in individuals who have received a tendency to the neoplastic type of growth 

 as a heritage from their ancestors. — Geo. N. Papanicolaou. 



301. Moore, Carl R. Sex-gland transplantation and the modifying effect in rats and 

 guinea-pigs. [Abstract.] Anat. Rec. 20: 194. 1921. — In the white rat, testicular tissue 

 grafted into young, spayed females, will persist for a period of nine months. Associated 

 with the testicle graft the behavior of the animal is decidedly male-like. — Ovaries trans- 

 planted into young, castrated males will persist and grow for several months. Such an ani- 

 mal, as an adult, exhibits a maternal behavior towards the young. Somatic differences 

 between male and female are too slight to be of value in a differential diagnosis of maleness 

 or femaleness. — In guinea-pigs, ovaries grafted into young, castrated males persist for sev- 

 eral months and are accompanied by certain somatic modifications in the male; the teats 

 of the mammary glands hypertrophy and compare favorably in size with those of preg- 

 nant females, though little or no secretion could be expressed. Psychical modifications 

 of the male are not, in the author's experience, subject to modification. — Testicular tissue 

 grafted into young, spayed females can be recovered nine months later. No mature sperm 

 were present in the seminiferous tubules but active mitoses were common in cells of the 

 germinal epithelium, a considerable amount of which may remain. Females bearing such tes- 

 ticle grafts exhibit the characteristic male sex behavior (psychical modification) and the 

 external genitalia appear male-like (somatic modification). — In the white rat ovarian grafts 

 will persist for eight months in a male with 1 normal testicle. Graafian follicles continue 

 their development normally up to the maturation period of the ovum. Subsequently the 

 follicles undergo atresia without ovulation. — There appears to be no deleterious influence of 

 secretions from either sex gland upon the opposite one. — Carl R. Moore. 



302. Morgan, T. H. The effects of castration of hen-feathered Campines. Biol. Bull. 

 39 : 231-247. 10 fig. 1920. — Completely castrated hen-feathered male Campines develop 

 normal male plumage. — H. D. Goodale. 



303. Morgan, T. H. The effectsof ligating the testes of hen-feathered cocks. Biol. Bull. 

 39: 248-256. 11 fig. 1920. — Ligation of the testes, if suflEicient to cause complete degenera- 

 tion of the testes, results in assumption of male plumage by hen-feathered adult cocks. — • 

 H. D. Goodale. 



304. Morgan, T. H. The genetic factor for hen-feathering in the Seabright Bantam. 

 Biol. Bull. 39:257-259. 1920.— Additional data are given, but without settling definitely 

 whether one or two factors are involved, and proof is presented that the character is not 

 sex-linked. — H. D. Goodale. 



305. MuLLER, H. J. Further changes in the white-eyed series of Drosophila and their 

 bearing on the manner of occurrence of mutation. Jour. Exp. Zool. 31 : 443-473. 3 fig. 1920. 

 — Three new mutations of the W gene in the X chromosome of Drosophila are described, the 

 characters produced being ecru, a straw color, ivory (found by A. H. Sturtevant) and a new 

 white. In addition an orange-eyed male appeared which did not transmit its mutant eye 

 color. A consideration of the manner in which these characters appeared suggests that the 

 mutations which produced them occurred at various times, — the first in a late oogonial cell or 



