BY A.. G. HAMILTON. 43 



The inner structure of the pitchers is simple. From beneath 

 the incurved teeth of the rim, a thick ledge or collar, named by 

 Prof. Dickson the conducting shelf, hangs down all round for a 

 short distance — 10-1 2 mm. It is produced clear of the pitcher 

 walls, so that it forms an inner collar like that in a lobster-trap. 

 The inner surface of the pitcher below this is very smooth and 

 glossy, and with the lens, or even with the naked eye, this 

 portion is seen to be full of small dots, which are glands similar 

 to those found on all the exterior surface of the plant. They 

 are most closely placed just round the insertion of the petiole, 

 and extend downwards to the line of the top of the lateral gland 

 mark at the sides, but lower in front. This downward limit is 

 the highwater mark of the contained fluid, none occurring below 

 (fig. 7). For this reason I am inclined to think that they are 

 secretive and attractive in their nature. At any rate they are 

 not likely to be absorptive. Prof. Dickson (4) points out that, 

 unlike the glands of Nepenthes, they have no apparent connection 

 with the vascular system. Thus the inner surface of the pitcher 

 may be divided into the conducting shelf, the glandular, and the 

 eglandular regions. 



On each side, below the glandular surface, commencing at 

 about the level of the lower extremity of the external lateral 

 wing, and running obliquely downwards and forwards, is a slight 

 elevation, called by Prof. Dickson the lateral coloured patch, but 

 which I prefer to call the lateral gland mass (fig. 7 glm). These 

 are kidney-shaped in outline, and with the naked eye small 

 rounded projections from the surface are seen, most plentifully 

 at the posterior margin, where also the substance of the mass is 

 thickest. Examined with the hand lens, these are seen to be 

 hemispherical elevations, and the microscope shows them to be 

 glands of a larger size and more complete structure than those of 

 the upper glandular region. In young pitchers the masses are 

 lighter than the rest of the inner surface, but at length become 

 purplish-red, the glands remaining yellowish. In fully matured 

 pitchers, the masses are undistinguishable from the rest of the 

 surface except by their rising above it, and by the lighter colour 



