reenact eel 
1904] CURRENT LITERATURE 147 
additions to the chapter on storage tissues are a description of JONsson’s peculiar 
“‘mucilage cork,” water storage cells derived from phellogen; and a note regarding 
FiscHeEr’s work on inulin. Much new material is found in the chapter on aera- 
tion tissues: RACTBORSKI’s breathing organs in early leaf stages; WESTERMAIER’S 
remarkable but questionable lung-like organ on Sonneratia roots; BRowNn and 
Escomse’s brilliant work on gas diffusion; KAMERLING on liverwort pores; 
Porscu on adaptations for securing permanent closure in the stomata of sub- 
merged hydrophytes; and Devaux on lenticels. HABERLANDT disagrees in part 
with DEvavux’s results, and does not consider the paper as very important; he 
also rejects WIELER’s results concerning aerenchyma. T here is an excellent 
new figure of a lenticel, and another interesting new figure is that of the stoma 
of Nipa. Another chapter that is rich in new matter is that on “Die Sekretions- 
organe und Exkretbehilter.’”’ The hydathode figure is much improved, and 
the rich recent literature on hydathodes is well summarized; little or no credit 
is given to the views of SpANJER and LEPESCHKIN, insofar as they are contrary 
to the views formerly expressed by the author. One of the notable additions 
here is the discovery of glands in Ruta which discharge to the exterior by means 
of slits that arise between external cells. 
Far the most notable change of the new edition is to be found in the expansion 
of the old eleventh chapter, entitled “Apparate und Gewebe fiir besondere Leist- 
ungen.” The material there presented is now considered in three chapters, 
entitled respectively “Das Bewegungssystem,” ‘Die Sinnesorgane,” “Einricht- 
ungen fiir die Reizleitung.” In the chapter on motor tissues there is a fuller 
discussion of the hygroscopic tissues. ‘There is an entirely new section on cohe- 
sion mechanisms, embracing the contributions of KAMERLING, STEINBRINCK, 
and ScHropt, regarding the movements that are due to the cohesive force of 
water in the cell lumina of fern sporangia and liverwort elaters. Much is also 
added in the section dealing with living motor tissues, embracing in particular 
the contributions of Firrinc, SCHWENDENER, MOstvs, PANTANELLI, and HABER- 
LANDT. The topic which has been most completely recast is that of the sense 
organs, and in this field HABERLANDT himself has been a pioneer and major 
contributor. This chapter for the most part may be regarded as a summary 
of the volume on this subject which has but recently come from the author’s 
hand. After an introduction treating the general characteristics of sense organs 
in plants, there is a specific description of the tactile pits of Cucurbita and 
Drosera, the tactile papillae of various stamen filaments, and the tactile hairs 
of Centaurea, Biophytum, Mimosa, Aldrovandia, and Dionaea. Then follows 
an account of the sense organs for the perception of gravity and light stimuli; 
here there is a description of the statolith organs of plants, in which there is 
incorporated the chief results of Nemec, Nott, Jost, Darwin, and particularly 
those of the author. In the chapter on motor mechanisms, there is an entirely 
new section dealing with the intercellular and intracellular fibrillar structures, 
to which NEmec in particular has devoted so much attention. HABERLANDT 
