350 . BOTANICAL GAZETTE [may 



stomatiferous species with spiral elaters. The important differences between 

 Megaceios and Anthoceros are that the former has multiple chromatophores, no 

 stomata, a solitar}^ antheridium, spiral elaters, and green spores. In one species 

 {M. salakensis) the sporogonium dehisces along one side. The thallus closely 

 resembles that of Anthoceros. The reviewer has frequently observed single 

 antheridia in A. laevis and the same is reported for A, Pearsoni. The axial row 

 is cut out of the archegonium initial by three intersecting walls, as is true for all 

 Hepaticae. The neck -canal cells are four, rarely five. The early development 

 of the embrj'o and details of the sporogonium closely resemble Dendroceros, but 

 the sporogenous tissue is more extensive than in either Anthoceros or Dendroceros. 

 One figure suggests that perhaps a portion of the tip of the endothecium is spo- 

 rogenous, as has been found in Notothylas by Lang. The sterile cells form an 

 irregular network inclosing the spore mother cells, which are slightly" lobed. 

 The elaters are branched. No germ tube is produced. 



Two Javanese species of Dendroceros, designated A and B, were studied. 

 Species A had a better-developed columella than B. In a Jamaican species the 

 reviewer finds that the tip of the sporogonium Is occasionally sterile. Spores of 



A and B, as well as other Javanese species of Dendroceros, germinate before 

 being shed. 



Notothylas javanicus closely resembles the cosmopolitan N, orbicularis. 

 The archegonia are broader than in Anthoceros, but the neck -canal cells are 

 reduced to three. The first division of the embryo is longitudinal, and not 

 transverse as Mottiee thinks is true in N. orbicularis. It is suggested that 

 possibly the endothecium contributes something toward sporogenous tissue, as 

 has been recently shown in another species of Notothylas by Lang, although 

 Campbell makes no mention of Lang's work. • 



Campbell thinks that perhaps the affinities of the Anthocerotales are with 

 the Marchantiales rather than with the Jungermanniales; that perhaps the 

 sporogonium of Notothylas is best compared with that of Cyathodium. He 

 thinks that the relationships of the group are so remote from other Hepaticae 

 that It should form a special class, "Anthocerotes."— W. J. G. Land. 



Ever-sporting varieties and variegation.— Ever-sporting varieties have received 

 illuminating treatment by BAxm,^4 ^yho places the sport condition among the 

 normal fluctuating reactions of the particular variety in question. When there 

 is a complete parallelism between the modification of a character and the variation 

 of external stimuli which cause the modification, a chance distribution of varieties 

 results; but when this parallelism is only partial, as is frequently the case, a 

 "half-Galton" or otherwise modified cur\'e will appear, and the occurrence of 

 such modified curves may sen.'e as a sign of ever-sporting varieties. 



The sport condition appears only when a certain intensity of the combi- 



Baitr 



Bastardform lebensfahigen Sippe von Antirrhinum majus. Ben Deutsch. Bot. 

 Gcsells. 25:442-454. 1907. 



