136 Meyen's Report for 1839 on Physio logical Botaraj. 



parenchymatic cells of Musa, M. Morren observes, that the 

 crystal-bearing cells, which M. Turpin has called Biforines, 

 decidedly require a peculiar name, and that in the case of 

 Caladimn rugosum^ Avhere they exhibit only one opening, they 

 must be called Uniforines ; and that from the same reason it 

 is necessary to call the other cells, without openings, which 

 contain acicular crystals, by a determinate name, and he pro- 

 poses for them destines (from KXeta). 



I have shown in the former reports that there is no suffi- 

 cient existing reason for giving these cells a distinct name as 

 M. Turpin had done ; but I can still less approve of these new 

 appellations Uniforine and Clestine, because, if one examines 

 the Caladia in regard to these cells, it is soon evident, that in 

 different parts one and the same kind of cells is found in one 

 place as Clestines, in another as Uniforines, and in others as 

 Biforines, and the latter appear always as simple cells when 

 in a young state : the different names would only lead us to 

 suppose that there was here some actual difference. The 

 opening of the so-called Biforines is evidently a purely phy- 

 sical phenomenon, as was proved in the former Report (p. 110). 

 M. Morren remarks, that in the Clestines of Musa he had ob- 

 served a gummous mass, an appearance which I myself have 

 observed in other plants. The treatise is accompanied by 

 good figures. 



M. S. F. Hoffmann* has continued his observations on the 

 hairs in the air-passages ; he found them in all the species of 

 lAmnanthemum he examined, but without dots, and he con- 

 vinced himself that they do not exist in Villarsia. Among 

 the Nym^jkcece, the genus Eiiryale {ferox) exhibited such dotted 

 hairs as are found in the air-cavities of the different organs of 

 the genera NympJiaea and Nujihar. 



M. Hoffmann treats of the same subject in the last part of 

 the Tijdschrift of v. d. Hoeven and de Vriese for 1839, p. 269- 

 271. In the same volume, p. 257-269, M. Hoffmann gives 

 the results of his new researches as to Lemna arrliiza being a 

 distinct species, as also anatomico-physiological observations 

 on the formation of buds in the different species of Lemna : 

 these communications are, however, only to be considered as 

 the forerunners of a larger work which M. Hoffmann had sent 

 to the press, and has just appeared in the first number for 

 1840 of Wiegmann's ' Archiv fur Naturgeschichte ;' we shall 

 therefore review it in our next Report. 



* Nachtrag zu dcs BeobacliUiiigder Luftrohreiihaare bci Liiniiuntheinum, 

 Cimelin, and rUlursia, V. — Liniuva, xiii. pp. 291, 29G. 



