48 ART. 4. — A. YASUDA : ON THE 



cells, mostly thick-walled, (iii.) stone-cells, (iv.) irregular tliin- 

 walled cells, which abound in intercellular spaces, (v.) thin-walled 

 compressed cells, (vi.) the remnant of the nucellus, and (vii.) the 

 remnant of the endosperm. 



The epidermal cells constituting the first layer of the testa, 

 when immersed in water, swell greatly. Their forms are very 

 characteristic, being entirely different from the epidermal cells 

 found in other parts of the plants. They are divided into three 

 classes : (a) the flattened or cubical form, (b) the prismatic form, 

 and (c) the prismatic form with thickened-ridges on the cell-wall. 

 The first is found in Adinostemma racemosum, Schizopepon hryonîœ- 

 foliu.^, var. japonlcus and Gymnosiemma cissoides, and among 

 these the lateral walls of the epidermal cells of the seed-coat of 

 Schizopepon hryonkefolius, var. japonicus deserve special notice, 

 for they become thinckened inwards, pointing gradually outwards. 

 The second is found in Momordica Charantia,^^ Tricliosanthes 

 cuGumeroides, T. japonica and T. multiloba ; and the third, in 

 3Ielothrm japonica, Luffa rylindrica,-^ L. acutangula, Ciirullus 

 vulgaris, '^^ Cucumis salivas, C. Melo, Benincasa cerifera, Lagcnaria 

 vulgaris and Cucurbita Pepo, and the thickened-ridges of Cucurbita 

 Pcpo,^^ Lagenaria vugarig'^ and Benincasa cerifera ramify dendriti- 

 cally at the apex, while those of Melothria japonica, Cucumis 

 sativus'''^ and C JIclo'^ point towards the apex and extend towards 

 the base (PI. V. Fig. G4-65). 



1) II. A. LoTAK. Ik: cit. p. 221. 



2) J. F. FiCKEL. be. cit. p. 771. :uul II. A. LoTAR. loc. cil. p. 218. 



3) J. F. FicKEL. loc. cit. p. 757. 



4) Ditto, p. 7C9. and H. A. Lotar. loc. cit. p. 21G. 



5) J. F, FicKEL. loc. cit. p. 742. 

 G) C. J). Harz. loc. cit. p. 777. 

 7) H. A. Lotar. loc. cit. p. 2 IG. 



