OF LOWER GllKKXSAyi) PLANTS. 



\4i 



the protoxylems face away from the axis. The seeds are borne 

 at the bases of the scales, two on the inner side of each. One 

 pair of them can be seen attached to the parent scale at s. in 

 PI. X, fig. 4. They are 4 ram. in diameter and 1 cm. long. In 

 all the seeds cut in the sections, there only remain the layers 

 of the testa with part of the outer tissues ; most of the inner 



-t. 



Text-fig. 31. Pinostrobus sussexiensis (Mantell). Part of the testa showing 

 the irregular outline and ridges (r.) of the stone (s.). i., cells of inner 

 integument, ; o., cells of outer integument, which merges with the 

 wing. No. V. 3349 a. 



layers of the testa as well as the nucellus, endosperm, and 

 embryo leave no trace. In section, the stony layer of the testa 

 ia much indented and is irregularly star-shaped in outline 

 (text-fig. 31), which appears to represent surface-corrugations. 



