152 GENETICS IBot. Absts., Vol. VI, 



development the chimpanzee changes and gets other appearance, man being more conservative 

 and fixing the embryonal qualities. From these facts the following conclusion is drawn: "that 

 the causes of the loss of hairy skin in man, except on the skull, are already at work in the 

 embryonal development of the Primates. Thus it can not be caused by external influences, 

 nor by causes appearing for the first time at the moment of origin of man. Then it must be 

 an internal factor for development at work already in principle in the Primates and reach- 

 ing in man its maximum of force." This internal factor is cause of man's conservatism, and 

 this fact is a determined variation. From this, the writer gives as a most far-reaching conse- 

 quence the opinion, that the series of animals was fated to take its origin and its develop- 

 ment as it has been taken; there was determined already in the first living organism the future 

 of man-building. — M. J. Sirks. 



1066. Breitenbecher, J. K. The relation of water to the behavior of the potato beetle in 

 a desert. Carnegie Inst. Washington Publ. 263: 341-384. 5 fig. 1918. — Egg-production is 

 favored by high humidity. Beetles die if buried while activities are normal, but hibernate 

 successfully if first somewhat desiccated. Hibernation may be induced by desiccation, except 

 at low temperatures. Duration of hibernation depends on humidity and temperature, emer- 

 gence from hibernation requiring moisture and warmth. — A. Franklin Shull. 



1067. Cardot, Henry, and Richet, Charles. Heredite, accountumance et variability 

 dans la fermentation lactique. [Heredity, adaptation and variations in lactic fermentation.] 

 Ann. Inst. Pasteur 33: 575. Sept., 1919. 



1068. Catjli-rabi. A Brassica cross. Gard. Chron. 67: 8. Jan. 3, 1920. — One seed 

 was presumed to result from a cross between an Autumn Giant cauliflower and a kohlrabi. 

 The plant from this seed had a large swollen stem like the kohlrabi. The seeds of this 

 plant, apparently from open pollination, produced plants having swollen stems of different 

 shapes, but similarly shaped leaves. — John Belling. 



1069. C[otjlter], J. M. Sex intergrades. [Rev. of : Yampolsky, Cecil. The occurrence 

 and inheritance of sex intergradation in plants. Amer. Jour. Bot. 7: 21-38. Jan., 1920. (See 

 Bot. Absts. 5, Entry 502.)] Bot. Gaz. 70: 88. July, 1920. 



1070. Dalcq, Albert. Note sur la spermatogenese de l'orvet. Aspect nucleaires de la 

 lignee typique (existence d'un heterochromosome). [Note on the spermatogenesis of the orvet 

 (Anguis). Nuclear aspects of the typical line (existence of a heterochromosome.] Compt. ReDd. 

 Soc. Biol. 83: 995-997. 1920. 



1071. Dammerman, K. W. On hybrids of Batocera albofasciata and gigas. Tijdschr. 

 voor entomologie 62: 157-160. 2 pi. 1919.— Some deviating forms of Batocera, partly caught 

 in the field, partly reared on Ficus-wood, and supposed to be hybrids between Batocera gigas 

 Drap. and B. albofasciata Degeer, led author to undertake experiments of cross-breeding 

 between these two species. Small individuals of B. gigas were selected for these experiments, 

 in order to prevent the difference in size from being a hindrance to crossing. The crosses 

 were successful; only their number was small, viz., 14 from albofasciata male and gigas female 

 and 15 from the reciprocal cross. The hybrids differed somewhat, among themselves in 

 regard to color and design; as regards color they were on the whole intermediate, as regards 

 design strongly matrocline. Offspring from these Fi-hybrids could not be obtained; they 

 may be considered as being sterile. However a few descendants could be bred from gigas 

 male and a female strongly resembling gigas, but with two white spots on the elytra, the 

 parents of which however were not known. Of these five hybrids thus obtained, 3 were 

 unspotted, while two of them showed a third spot beside the two maternal spots. — M. J. Sirks. 



1072. De Wilde, P. A. Verwantschap en erfelijkheid bij doofstomheid en retinitis pig- 

 mentosa. [Relationship and heredity in deaf-and-dumbness and retinitis pigmentosa.] Diss. 

 Amsterdam. 91 p. 1919. — From an extensive investigation of the occurrence of deaf-mute- 



