280 Annales ties Sciences Naturelles. 



minatione per membranatn exteriorem novos utriculos emittentibus — 

 Roseae et olivacese, omnes thalassiopliytae, illae maris aperti et profundi- 

 oris potissimum incolae, hse sinubus tranqiiillioribus (apud nos, an sem- 

 per ?) plerumque privae. 



3°. The movement of the sporules is not Hmited to the fresh-water 

 Algae, nor is it common to all Cryptophytes. It does not depend on 

 any external circumstances, but on the contrary, is intimately con- 

 nected with the vital phenomena of all the beings in which it is ob- 

 served. It is not the expression of an animal life, although it has 

 the appearance of this ; and we ought not to compare it with the 

 movements observed in the Diatomacese. — 4°. Both kind of organs 

 of fructification of the Florideae are capable of propagating the spe- 

 cies, and the one is never the rudiment or the young state of the 

 other. — 3°. The Algse never grow from the reunion of several seeds, 

 but each seed (seminule) pi'oduces its own individual. — 6°. The 

 theory of metamorphosis of modern algologists is based on facts which 

 ought to be explained otherwise than they have yet been. The 



transformations of one species into another are illusory. DuRiiEi 



iter asturicum botanicum, anno 1833 sicsceptum, auctore J. Gay. 



Synopsis des Gerandiees, tribtc des Scrophularinees, par M. 



G. Bentham, from the " Companion to the Botanical Magazine." 

 Notice sur quelques cryptogames nouvelles,par J. Desmazier- 



ES Observations sur les Diatomees, par M. de Brebisson 



Note de M. TxjB.Piiti, ajoutee ausc observations deM.. de Brebisson. 

 This observer has discovered that the shell of the true Diatomacese 

 is composed of silex, in which he has been anticipated by Ehrenberg, 

 but his experiments are nevertheless very valuable, as confirmative 

 of a discovery which has given origin to some curious researches on 



the composition and formation of tripoli and similar deposits 



Description de I'Euphrasia Jaubertiana, nouvelle espece du sous- 

 genre Odontites, par A. Boreau. 



Novembre. Organograpliie des Cistacees, par Edouard 



Spach. Quelques observations relatives aux genres Scilla et Ur- 



ginea, — deux genres a etablir dans lafamille des Liliacees, et descrip- 

 tion d'une espece nouvelle, par Ad. Steinheil. Sur le Lythrum 



alternifolium, joar M. Boreau. Sur lafaculte que possedent les 



plantes d' absorber les infusions colorees par leurs racines, par J. G. 



Towers Sur la faculte. d' absorption attribute aux spongioles 



des racines par M.KiiiGHT. This and the preceding are trans- 

 lations from the Transactions of the Horticultural Society of London. 



Note stir deux noiivelles especes du genre Spitzelia, par M. C. H. 



ScHULTZ Enumeration des plantes decouvertes par les voya- 



