1836.] Sub-Himalayan Fossil Remains of Dddtipur. 739 



6a. Lateral view of the nuclei or young grains of Pollen. 

 6b. Vertical view of ditto on its outer face. 



7. Pollen immature : the perianth being 3 lines in length. 



7a. Represents what was the inner face prior to the escape of the nucleus 

 from the cell. 



8. Pollen viewed variously ; perianth 5 lines in length, shewing the various 

 degrees of expansion of the fissure according to the length of immersion. 



9. Pollen : perianth 6J lines long. 9a. Inner membraue escape. 



10. Perfect Pollen. 10a. Grain viewed as an opaque object. 



Plate XL1I. A. 

 Pollen of Luffafcetida. 



1. Portion of a mass extracted from one of the cells of an anther : flower- 

 bud one and half line long. 



2. Portion of a mass more advanced : the component cells adhering toge- 

 ther firmly. Flower-bud about two lines long. 



3. Cells of a mass more advanced : they cohere very slightly. Perianth two 

 and half lines long. 



4. The same submitted to slight pressure, shewing that each nucellus is 

 contained in a separate cell. 



5. Cells more advanced. 



6. Pollen perfectly formed, but destitute of granules. Flower-bud about 

 three and half lines long. 



7. Three grains of Pollen considerably more developed ; in the centre of 

 each fold there exists a pore. Flower-bud four lines long. 



8. Pollen : the folds have disappeared. Flower-bud five lines long. 



9. Perfect Pollen. 



All more or less magnified, and all examined in water. 



Plate XLII. B. 

 Pollen of a species of Hedychium. 



Fig. 1. Five original cells in various states of composition and cohesion. 

 Perianth three lines long. 



2. Grains of Pollen resulting from the complete separation of the above : an 

 inner disc is visible at this period. One grain has burst by pressure. 



3. Two grains of Pollen, one abortive. Perianth one inch long. 



4. Perfect Pollen : one grain ruptured by pressure. 

 All more or less magnified, and all viewed in water. 



VII. — Sub-Himalayan Fossil Remains of the Dddupur Collection. By 

 Lieuts. W. E. Baker and H. M. Durand, Engineers. 



QUADRUMANA. 



Lyell, when combating the inconclusive evidence advanced in 

 support of the theory of the progressive development of organic life, 

 notices the absence of remains of quadrumanous species in a fossil 

 state, and the hypothesis which this circumstance has by some geo- 

 logists been considered to countenance. He, however, draws attention 



