BY A. G. HAMILTON. 47 



Dickson has pointed out (4), when fractured, usually rolls back. 

 The epidermal cells are crenate in surface view. In section, the 

 sides are straight, but the bottom of each cell is hemispherical. 

 The side walls are often pitted —the pits narrow elliptical with 

 the long axis perpendicular to surface of epidermis. The meso- 

 phyll cells are rounded in outline, and the cells immediately 

 under the interior epidermis have long narrow pits. The cells 

 under the exterior epidermis are of the deeply-staining variety. 

 This description applies to the mesophyll of all parts of the 

 pitcher. 



The glands of this region are of two kinds — ( I ) Glands like 

 those of the external surface, with few cells, but rather large on 

 the whole. Their sides are straight, so that the glands are 

 roughly cylindrical. (2) Spherical glands resembling those of 

 the lateral gland patches, but smaller. They consist of a large 

 number of rounded cells, 12-20 in number, showing in surface 

 view; and the mass is enclosed by a sheath of flattened cells. 

 Their average size is 003 mm. Intermediate forms between the 

 cylindrical and spherical forms occur. The glands are very 

 plentiful, and, so far as I can make out, are not directly con- 

 nected with vessels, being usually situated betv/een the meshes 

 of the venation. 



Lateral gland patches. — These are designated by Prof. Dickson 

 the lateral coloured patches. Their position has already been 

 described. 



Epidermis. — This is composed of crenate cells in all respects 

 like those of preceding region. The glands are spherical 

 (fig. 13), and they are similar to those described for the glandular 

 surface, except that they are much larger — 0*1016 mm. Some- 

 times two are so close toojether that thev fuse "and form an 

 elliptical mass. They are most plentiful on the anterior edge of 

 the patches. In some but not all the specimens I examined, the 

 walls of the inner cells of the glands were pitted. The surround- 

 ing mesophyll cells stain very deeply, and there is usually much 

 starch present. At the anterior point of the gland mass, where 

 it runs into the ordinary surface, there occur some cells which 



