462 Miscellaneous, 



dently then quite erroneous to compare the green bodies of Oonium 

 or of Pandorina with the larger inner globules of Volvox ; they are 

 to be compared with the minute outer granules on the surface : and 

 though Volvox is much larger than Gonium in its aggregate state, 

 yet the individual animals are much smaller. In these small ani- 

 malcules, which appear in the form of very minute green warts on 

 the periphery of the Fo/vo^-globule, and to which little attention has 

 hitherto been paid, I have succeeded, by a laborious research, in re- 

 cognising relations of structure which coincide entirely with those 

 peculiar to the family of Monads." 



For the details of structure of these highly interesting Infusoria 

 we must refer the reader to Ehrenberg's work, * Ueber die Infusions- 

 thierchen,', whence this extract is taken ; and we may merely state 

 that this illustrious naturalist succeeded in discovering nutritive or- 

 gans, mouth, eyes, generative organs, &c. 



DEVELOPMENT OF THE LEGUMINOS^, 



Drs. Schleiden and Vogel draw from their interesting observations 

 on the development of this large family of plants published in the 

 * Acta Acad. C. L. C. Nat. Cur.' vol. xix. p. 1. the following con- 

 clusions : 



1 . The flowers of the Leguminosa are at their origin perfectly re- 

 gular. 



2. The subsequently cohering parts originate as free points, are 

 developed free, and cohere subsequently. 



3. All the parts of the flower are at their first appearance green 

 leaves. 



4. Even in the earliest stage only one carpellary leaf is visible in 

 the Leguminosce, which is open in the direction of the axis. 



5. The anthers are formed from leaves, the inner cellular tissue 

 being converted in part into pollen ; and the loculi originate at both 

 sides of the margin of the leaf, which is subsequently changed into 

 the bursting rima. 



6. The ovules are formed alternately at the upper margin of the 

 ovarium, and consist of the nucleus and generally of two integuments, 

 rarely of an integumentum simplex. 



7. The ovules of the Papilionacece are hemitropous. 



8. The embryo originates from the pollen tube at the micropyle 

 end of the embryonal sac, and increases either from this place to- 

 wards the chalaza, or (being propelled by the pollen tube, which has 

 become cellular, to the centre of the embryonal sac), both in the di- 

 rection of the chalaza and that of the micropyle. 



