86 Descendenz und Hybriden. — Morphologie und Teratologie. 



The evidence shows chesnut to be a Mendelian recessive to bay 

 or brown. Thus : 



6 named bay and brown sires mated with chesnut mares gave 

 370 foals, all bay or brown. 



12 other named bay and brown sires mated with chesnut mares 

 gave, on the other band, 355 bay and brown foals and 347 chesnut. 



100 chesnut sires variously extracted, mated with about 600 

 chesnut mares of various extractions, gave 1095 chesnut foals and 

 9 bays or browns ; i. e. under 1 per cent. of exceptions to the rule. 

 These exceptions are regarded as representing breeder's or printer's 

 errors. 



A further sample gave the following result (mares in all cases 

 chesnut): 



30 RR Sires gave 455 R + 3 D 



25 DD „ 450 D + 4 R 



54 DR „ 496 D + 507 R. 



„Finally" the author writes „it would appear that the distinct 



properties of chesnuts must be ascribed to segregation rather than 



to ancestry, seeing that their behaviour in heredity is entirely diffe- 



rent from that of bays and browns, though their ancestral compo- 



sition may for several generations have been the same." 



R. H. Lock. 



MiGLiORATO, E., Contribuzioni alla teratologia vegetale. 

 (Ann. di Bot. Vol. IV. [1906.] Fase. I. p. 49.) 



Dans cette note l'auteur ddcrit les monstruositds suivantes: 

 fasciation &Althaea rosea, bifurcation de la fronde d'Aspidiiim 

 aculeatum, concrescence des branches de Prunus Laurocerasus, 

 dddoublement des feuilles de Vitis vinifera var., Eucalyptus sp., 

 Hedera Helix, Ajuga reptans, Pogostemon plectranthoides, Persea 

 Borhonia, Laurus nohilis, Parictaria officinalis, concrescence de 

 feuilles de Viola sp., Althaea rosea, ascidie de la feuille de 

 Matsonia tenuifolia (avec une table statistique), concrescence de 

 p^doncules de la fleur du Cyclamen hederaefolium, pelorie de 

 Isoplexis canadensis, chloranthie de Alliaria officinalis^ fleur avec 

 deux levres infdrieures dans la Calceolaria repens. 



F. Cortesi (Rome). 



MiGLiORATO, E., Contribuzioni alla teratologia vegetale. 

 (Ann. di Bot. Vol. IV. [1906.] Fase. II. p. 61. Tav. 1.) 



L'auteur ddcrit dans sa note la Symphyse de deux feuilles 

 opposdes au sommet de Taxe, nouveau cas tdratologique qu'il 

 appelle coryphisymphyllie, et qu'il a observ^ dans la //>Y//T/;/^£'a 

 Hortensia DC. Une bonne planche illustre le phdnomene. 



F. Cortesi (Rome). 



MOTT, W. W., Teratology in the Flowers of two California 

 Willüws. (Univ. of California Publications. Vol. II. 1905. 

 p. 181—228. Pls. 19—20.) 



The writer records various cases of teratology in the flowers of 

 Salix lasiandra Benth. and in a hybrid of 5". lasiandra X baby- 

 lonica L. In the former species he describes as new for Salix an 

 intimate association of micro- and megasporangial tissue, overlooking 

 an earlier account by the reviewer (Botanical Gazette. Vol. XXIIL 



