74 MR. C. BAILEY ON THE STRUCTURE ETC. 



Fig. 32. Transverse section of the side of the leaf of N. graminea, Del., from 

 Celebes ; enlarged ^f ^. Magnus, ' Beitrage,' pi. vi. fig. 2. 



33. Transverse section of the leaf of N. graminea, Del., from Celebes; 



enlarged -f-. Magnus, ' Beitrage,' pi. vi. fig. i. 

 In figs. 31-33 the leading bundles are drawn schematically: 

 z= intercellular spaces, 6=bast-cells. 



34. Isolated bast-cell from the leaf of N. graminea, from Celebes ; 



enlarged -^-. Magnus, ' Beitrage,' pi. vi. fig. 46. 



35. Male flower of N. graminea; enlarged -V~. Magnus, 'Beitrage,' 



pi. iii. fig. 6. 



36. Transverse section of the stem of Caulinia alaganensis. From 



' Tavole per ima Anatomia delle piante aquatiche,' Parlatore, 

 pi. vi. fig. 3. 



37. Surface-view of the outer cell-layer of the unripe seed of N.flexilis ; 



^^K Magnus, ' Beitrage,' pi. v. fig. 9. 



38. Diagonal section of the nearly ripe seed-shell of N.flexilis ; enlarged 



-f ^, Magnus, ' Beitrage,' pi. v. fig. 8. 

 39 & 40. Diagonal sections of the still (? if not always) unripe seed-shell 

 of N. graminea, from Cairo ; enlarged -f ^. Magnus, ' Beitrage,' 



pi. V. fig. II. 



41 . Diagonal section of the quite ripe seed-shell of N. graminea, from 



Cairo; enlarged ij-. Magnus, 'Beitrage,' pi. v. fig. 12. 



Figures in the Letterpress. 



All the figures are drawn from Eeddish specimens of Naias gra- 

 minea, Del,, var. Delilei, Magnus, except when stated otherwise. 



42. N. graminea. — Transverse section of stem, drawn diagrammatically ; 



enlarged V"- 



43 & 44. N. graminea. — Ends of leaves, showing dentition ; enlarged ^^-. 



45 &46. iV.yZe/cJKs.— Spines on margins of leaves, from specimens col- 

 lected by Dr. Boswell in Loch Cluny, near Blairgowrie, Perth- 

 shire ; enlarged if^. See 'Journal of Botany,' No. 154, 1875, 

 p. 297. 



47-49. N. graminea. — Spines on margin of middle portion of leaf; 

 enlarged -\-. 



50. N. minor, — ^Tooth of leaf from one of Archbishop Haynald's spe- 



cimens, from ponds in his park at Kalocsa, Hungary ; enlarged 

 1 5 e 



51. N. major. — Tooth of leaf from plant collected near Coblentz by 



Dr. Ph. Wirtgen ; enlarged J-f^. 



52. N. graminea. — Large leaf-sheath from leaf of first pair ; enlarged V- 



53. N. graminea. — Usual form of leaf-sheath from leaf of first pair; 



enlarged ~V. 



54. JV". graminea. — Usual form of leaf -sheath from leaf of first pair, with 



u'regular-sized auricles ; enlarged -x*. 



