No. 2, September, 19211 GENETICS 119 



Female, 44 years old (father and 3 sisters out of 5 sibs have died of carcinoma of the digestive 

 tract). Both ovaries were enlarged, cystic, left side having dermoid cyst with hair, pulp, 

 teeth, and a dermoid villus. — (b) Female, 19, daughter of (a), had cyst on left side, behind 

 uterus, — right ovary the size of a hen's egg, not adherent, with smooth, walnut-sized cyst on 

 lateral half. The larger cyst, excised, showed, on sectioning, oily pulp with short black 

 hairs, and a piece of bone developed from cartilage, with two teeth. The author discusses 

 the probability of inheritance. — II. (a) Female, 41 years old. From the rear end of the uterus 

 a subserous myoma, the size of a goose egg, occurred. — (b) The 15-year-old daughter of II 

 (a). An operation revealed a dermoid cyst on the right side as large as a man's head, and, 

 over it, the thickened tube. Most of the tumor was cystic with serous contents; only in one 

 place was dermoid pulp and a villus present. — (c) The sister of II (b) had a parovarial cystic 

 tumor (the size of a child's head), which was excised with the tube. — The author considers 

 the theories of the origin of the 3 types of tumors here considered. He believes that they 

 may support Billroth 's hypothesis of a general cancer diathesis. This theory and the 

 possible factors underlying tumor formation are discussed. The author believes that there is 

 an hereditary disposition to tumor formation which is general in nature, — the type of tumor 

 in the special case being due solely to chance. — C. C. Little. 



750. Lek, VAN DER. [Dutch rev. of : Nilsson-Ehle, H. Uber Resistenz gegen Hetero- 

 dera Schachti bei gewissen Gerstensorten, ihre Vererbungsweise und Bedeutung f iir die Praxis. 

 (On the resistance to Heterodera Schachti in certain varieties of barley, its method of inheri- 

 tance, and significance for agricultural practice.) Hereditasl: 1-34. 4 fig- 1920 (see Bot. 

 Absts. 6, Entry 1731).] Genetica 3: 71-72. 1921. 



751. LoEB, Jacques. Further observations on the production of parthenogenetic frogs. 

 Jour. Gen. Physiol. 3: 539-545. 3 fig. 1921. — Over 20 parthenogenetic frogs, produced by 

 puncturing unfertilized eggs, have been raised to advanced and adult stages. The occurrence 

 of both sexes suggests that, in the frog, the female is heterozygous for sex. The males possess 

 26 chromosomes, the diploid number. Accidental fertilization of eggs was excluded by mode 

 of procedure and only the punctured eggs developed. The diploid number may have been 

 produced either by retention of the second polar body or premature division of chromosomes 

 without cell division. The number of chromosomes in female parthenogenetic frogs is un- 

 known but both diploid and haploid numbers have been reported from tadpoles too young 

 for sex determination. Many parthenogenetic tadpoles did not metamorphose although 

 growth was normal. One over a year old was made to metamorphose in 2 weeks by feeding 

 thyroid gland from cattle. — J. L. Collins. 



752. LoTST, J. P. [Dutch rev. of: Sakamura, T. Experimentelle Studien iiber die Zell- 

 und Kernteilung mit besonderer Riicksicht auf Form, Grosse und Zahl der Chromosomen. 

 (Experimental studies on cell division and nuclear division with special reference to form, size, 

 and number of the chromosomes.) Jour. Coll. Sci. Imp. Univ. Tokyo 39": 1-221. 7 pi., 24 

 fig. 1920 (see Bot. Absts. 7, Entry 1844; 8, Entry 330).] Genetica 3 : 72-77. 1921. 



753. Malinowski, Edmund. Die Sterilitat der Bastarde im Lichte des Mendelismus. 

 [The sterility of hybrids in the light of Mendelism.] Zeitschr. Indukt. Abstamm.- u. Vererb. 

 22: 225-235. 1920. — The author made crosses between different types of Triticum vulgare 

 and T. dicoccum and determined the degree of fertility of the offspring by dividing the number 

 of seeds by the number of spikelets in the head. Fi was morphologically intermediate be- 

 tween the parents. In F2, new forms appeared, whose characters were inheritable. Fj 

 showed more partly or wholly sterile plants than fertile, and the greatest number of individuals 

 with relatively high degree of sterility. The results show very little evidence of interdepen- 

 dence between morphology and sterility. A study of F3 shows that different degrees of partial 

 sterility are inheritable. — The author criticises Belling's theory that sterility in hybrids is 

 due to the genetic composition of individual spores or gametes and proposes instead the theory 

 of genes or inharmonious elements meeting in a hybrid which act as complements to produce 



