Morphologie, Teratologie, Befruchtung, Cytologie. 243 



lequel les chromosomes passeraient ä l'etat vegetatif , mais un aspect 

 du Processus, meme de la division des chromosomes. Et l'alv^olisation 

 qu'on observe aux anaphases et ä la telophase ne serait qu'une 

 disposition residuelle laissee par cette Operation. 



La telophase suivante se fait exactement comme la precedente. 

 Les chromosomes filles, toujours alv^olis(?s, s'agencent en un peloton 

 serre qui simule un reseau, et de lä passent par une prospirophase 

 ä une mesospirophase essentiellement identique ä la mesospirophase 

 precedente. La spirophase n'est donc pas une formation qui soit 

 particuliere ä la premiere genöration ceilulaire postmaturative. 



II ne semble pas que, ni ä la telophase ni aux prophases ni ä 

 aucun moment de l'existence de ces noyaux, il 5^^ ait formation d'un 

 spir^me continu. Les chromosomes peuvent ä la telophase se souder 

 lateralement les uns aux autres, mais cela d'une fagon toute super- 

 ficielle et sans le moins du monde perdre de leur independance. 



Ces recherches paraissent apporter une donnee quelque peu 

 nouvelle, qui peut se formuler ainsi: il existe des noyaux, dont la 

 phase de repos simule le reseau des auteurs, mais est en realite 

 une spirophase. Cela veut dire que l'element nucleinien de ces 

 noyaux pendant le repos est un peloton de chromosomes longs et 

 spirales, un spironema. C'est en somme la doctrine de Carnoy, 

 moins la th^se de la continuite de l'element nucleinien admise par 

 lui. Ce sera la täche d'autres travaux de montrer jusqu'ä quel point 

 la formation d'un spironema pendant la Stade de repos est un fait 

 g^neral. Jongmans. 



Ferguson, M, C, Included cytoplasm in fertilization. (Bot. 

 Gazette. LVI. p. 501—502. 1913.) 



In a review of a paper by Nemec on the fertilization of Gagea 

 lutea the foUowing Statement occurs: "Another apparently unusual 

 feature is the inclusion of cytoplasm between the fusing nuclei. 

 This is the second record of such a cytoplasmic inclusion, the first 

 having been made by Brown in his study oi Peperornia."'' 



In connection with this Statement the present author fixes the 

 attention on some observations made by herseif on such inclusions 

 and published in two former papers. Jongmans. 



Füller, G. D., Reproduction by layering in the Black 

 Sprue e. Contributions from the Hüll Botanical Labo- 

 ratory. 173. (Bot. Gazette. LV. p. 452—457. 6 Fig. 1913.) 



During ecological studies along the Saguenay River, Que- 

 bec, observations were made upon the process of forest develop- 

 ment upon granitic areas with very little soil. The most careful 

 studies were made in Chicoutimi County on a series of granite 

 hüls. In these exposed situations there occurred a characteristic 

 pioneer forest association consisting of Picea mariana Mill., Piniis 

 Banksiana Lamb., Betida alba papyrifera (March.) Spach and Popu- 

 lus trerniiloides Michx. together with occasional trees of a few other 

 species. The pioneer stages of forestation were much prolonged, 

 but appeared to be promoted by the development of a peculiar 

 growth habit and a resulting vegetative reproduction by layering. 

 This habit was most highly developed in the black spruce. The 

 prostrate branches were rooting and producing upright shoots round 

 the parent trees and stumps. By this layering circular areas with a 



