Morphologie etc. — Varietäten etc. — Physiologie. 343 



of cytological interest. The writer has used his own discretion with 

 respect to articles of questionable relevance, and also in deciding, 

 whether or not incidental references to somatic mitosis should be cited. 

 The nomenclalure employed in the arrangement of the species 

 is that of N. L. Britton's Manual of the Flora of the Northern 

 States and Canada, 2d Edit. 1907. In the case of forms not within 

 the ränge of this work, the nomenclature follows the rules, laid 

 down b}^ the International Botanioal Congress at Vienna. Where 

 the two Systems differ, the designation of the Vienna code is 

 added in parentheses. Jongmans. 



Blakeslee, A. F., Sexual reactions between hermaphro- 

 ditic and dioecious mucors. (Biochem. Bull. XXIX. p. 87 — 

 102. 2 textfig. and pl. 2—3. Aug. 1915.) 



Reasons connected with imperfect hybridization when herma- 

 phroditic mucors are grown in contact wiih the sexual races of 

 dioecious forms lead to the conclusion that what Blakeslee has 

 called 4- races in the latter are female, and — races are male. 



Trelease. 



Harris, J. A., A first study of the influence ofthe star- 

 vation of the ascendants upon the characteristics of 

 the descendants. I. (Am. Nat. XLVI. p. 313—343. 1912.) 



Plants of Phaseolns vulgaris were used in the experiments. The 

 work was carried on in the field on "good" and "poor" agricultural 

 lands and the conclusions drawn from the plants grown thereon. 

 The author reports the provisional conclusion that starvation of the 

 ascendants for one to three generations has no conspicuous effect 

 upon the characteristic of the adult descendants, as far as the eye 

 can detect in the field. The calculated Statistical conslants appeared 

 10 indicate a slight decrease in the number of pods per plant. 



L. O. Overholts (St. Louis). 



McClendon, J. F., The effects of alkaloids on the develop- 

 ment of fish {Fundulus) eggs. (Amer. Journ. Ph3'siol. XXXI. 

 p. 131—140. fig. 1-9. 1912.) 



Thousands o^ Fundulus, eggs were placed in Solutions ofseveral 

 substances grouped together as alkaloids though being very diffe- 

 rent organic Compounds and belonging to both the aliphatic and the 

 carbocyclic series. Despite their diverse character these alkaloids 

 produced the same morphological effects on the eggs, retarded 

 development, and caused the same general abnormalities in the 

 resulting embryos. While it may be possible that the same abnor- 

 malities can be produced by any chemical treatment yet quantita- 

 tive results Show differences, for example, in the effect produced 

 by alcohol and that by alkaloids. M. C. Merrill (St. Louis). 



Llyod. F. E., Leaf water and stomatai movement in Gos- 

 sypium and a method of direct Visual Observation of 

 stomata in situ. (Bull. Torrey Bot. Club. XL. p. 1 — 26. 3 Fig. 

 11 Tables. 1913.) 



In the foregoing paper a method for the direct Observation and 



