NOTES. 
PRELIMINARY NOTE ON THE DISTRIBUTION AND 
STRUCTURE OP WATER-PORES (STOMATA) ON CO- 
TYLEDONS. — During the past summer (1888), while examining the 
histological structure of Campanula rapunculoides in the Laboratory at 
the Royal Botanic Garden, Edinburgh, I found that the stomata of 
the cotyledons were arranged in a peculiar manner ; and this led me 
to investigate the cotyledons of a number of seedlings then growing in 
the Gardens. 
The following is an abstract of these investigations : — 
Campanula rapunculoides (Fig. 1). — In the cotyledon of Campa- 
Apeoc 
Fig. 1. Group of water-pores on upper epidermis at apex of cotyledon of 
Campanula rapunculoides. Triangular patch at apex shows water-pores and very 
small epidermal cells with straight or curved walls. No stomata occur on any other 
part of the upper surface. The other epidermal cells are large, and vary in outline. 
