PHYSIOLOGICAL BOTANY. 303 



cotyledon with two rudimentary radicles, and a plumule 

 issuing from a fissure, the leaves not being sheathing. 

 But the figures themselves must be referred to. 



On the Anatomy of Aldrovanda vesiculosa. By Pro- 

 fessor PARLATORE. Giorn. Enciclop, i, 237. Compt. 

 rend. 1844, i, 998. A minute description of this plant, 

 which is known by its vesicles (ampulla*), which are in 

 fact leaf -blades, as in Utricularia. The following is 

 worthy of remark : " The part situated upon the ampullae 

 is composed of somewhat elongated irregular cells, and 

 exhibits peculiar bodies, such I have never seen before, 

 and which, I think, have never been noticed by any 

 botanist. These corpuscles, which are very numerous 

 and close together, resemble a small open pair of scissors, 

 as four arms are easily recognised in them, which are 

 connected in the centre by a kind of knot." I have found 

 these scissor-like plates. 



On the Surface of the Stem and the Contents of the 

 Cells of the Pith of Nuphar lutea Sm. By J. MUNTER. 

 Bot. Zeit., 1845, 505. The author has made the remark- 

 able observation that the pits in the stem (cormus), 

 beneath the scars of the petioles, are caused by roots 

 which separate spontaneously ; a phenomenon which has 

 not previously been observed in the vegetable kingdom. 

 In the cells of the pith, he detected the same forms of 

 starch which he had previously observed in Alstrcemeria. 



Researches upon the Structure and Development of 

 Nuphar lutea. By M. AUG. TRECUL. Ann. d. Scienc. 

 nat., 3 ser. vol. iv, 286. An anatomical memoir, much 

 of the contents of which is very excellent. The author's 

 views are rather too special in investigations of this kind, 

 and it would occupy far too much space to criticise this 

 memoir. 



On Clandestina Europcea. By M. DUCHARTRE. Compt. 



