22 Schively — Recent Observations on 



band, which may properly be termed the cuticle. The hypo- 

 dermal cells are curiously shaped, their walls are exceedingly 

 thickened, possessing flanges which abut upon each other. 

 Then follows a layer about eight cells deep, mainly of thin- 

 walled tissue. The inner cells, bordering directly upon the 

 cotyledons, are flattened and thick-walled. Marked increase 

 is noticed in the depth of the epidermal and hypodermal layers, 

 and in the extent of induration possessed by all cells if sec- 

 tions are made in the neighborhood of the hilum. 



The external epidermis of each cotyledon consists of two 

 rows ; these cells are smaller than those in the remaining por- 

 tion of the cotyledon. The latter cells measure .075 of a 

 millimetre. Starch and protein granules are present in all 

 cells, excepting those which have been termed epidermal ; in 

 these protein alone may be found. The starch granules are 

 spherical, measure .0075 of a millimetre, and have no charac- 

 teristic markings. The protein granules are so minute that 

 nothing satisfactory concerning their structure has been deter- 

 mined. 



Legumes of Subterranean Type. 



The epidermal cells of the subterranean legume resemble 

 in shape those described for the aerial, but the stomata are 

 situated at the apices of small papillae. In size and number 

 there is little difference from those of the aerial legume. The 

 entire surface is covered by a dense growth of hairs — very 

 many of the small bladder-like form, long unicellular ones, and 

 fewer of a kind somewhat resembling the last named, but differ- 

 ing from them in developing from a multicellular base, that is 

 raised conspicuously above the surrounding surface. A cross 

 section of the legume is remarkable in the absence of all indur- 

 ated tissue. Delicate fibres belonging to the vascular areas 

 are, of course, present ; but the inner epidermis has not 

 changed its thin-walled character, nor does the outer hypo- 

 dermal region show any indications of induration. As the 

 sutures arc not very prominent, tlie strong vascular bundles 



