PITCHER OF CEPHALOTUS FOLLICULAEIS. 5 



had started for America) a sliort account of what I had been doing 

 on this subject. On his return home Su- Joseph rephed, and at 

 the same time most generously sent me a number of very vahiable 

 notes and sketches, which he had made as early as 1874/of most of 

 the main features exhibited by these pitchers, especially the inner 

 surfaces of the pitcher and lid. I hope to be able to make my 

 acknowledgments more specifically when I publish a more 

 extended memoir, with illustrations. 



AVith regard to the small oval bodies studding the surface of 

 the lateral-coloured patches, I described them at the meeting of 

 the Association in the terms above given, but with a little 

 hesitation owing partly to the want of material and partly 

 to the difficulty I had in obtaining satisfactory sectional 

 views of them. Sir J. D. Hooker, in his Notes, has called 

 them stomata ; and certainly they sometimes, especiaUy in 

 young pitchers, are often puzzlingly like them. I have no 

 doubt, however, of the centre of each being filled by a " central 

 cell ;" and, from the observations I have made — though these are 

 not yet complete — I am disposed to think that, in a sense, they 

 may be stomata, for the central cell seems to be one bulging 

 up from a somewhat lower level, between the 2-4 peripheral cells of 

 the body which otherwise wOuld constitute a stoma-like opening. 

 If the above surmise be correct, these bodies may be regarded 

 as analogous to the " Wasser Spalten' recently described by 

 De Bary, in which case their secretion would probably serve to 

 dilute the other secreted matter ; to which an interesting parallel 

 might be found in the dilution of the secretion of the urinary 

 tubules by the water given ofi:' from the Malpighian tufts of the 

 kidney. 



Description or Plate 193. — (In all the figures the position of the main 

 axis is to the left hand, and indicated by a cross +). 



Fig. 1. — Longitudinal mesial section of pitcher of Cephalotus follicularis ; 

 I, Ud, springing from that portion of the pitcher-margin next the main axis ; 

 it, inflexed teeth of corrugated rim ; cs, conducting shelf; x, place of reflection 

 of epidermis from outer (concealed) surface of conducting shelf to the upper 

 glandular surface (ugs) of the pitcher cavit}-; Ip, one of the lateral coloured 

 patches ; els, smooth, eglaudular, '• detentive surface" at bottom of the pitcher ; 

 vidtv, median dorsal wing. 



Fig. 2. — Section of pitcher of Nepenthes (hybrid form of N. distillatoria?). 

 Here the corrugated rim exhibits two ridges, an involute and revolute one : in 

 this case the pitcher is bent up against tlie tendril-like portion of the leaf, so 

 that the hinge of the lid is next the tendril. In some species the pitcher is 

 bent up against the tendril, so that the hinge of the lid is away from the tendril. 

 In either case, however, the hinge retains its normal position on that side of the 

 orifice furthest from the main axis, cav, pitcher-cavity ; ap, apex of leaf. 



Fig. 3. — Section of pitcher of Sarracenia purpurea. The lim of the pitcher 

 is revolute. The lid springs from that portion of the orilice farthest from the 

 main axis, cav, pitcher-cavity ; mvw, median ventral wing. 



