40 Humphrey . — Development of Seed in Scitamincae. 
PLATE III. 
Figs. 41-49. Costas sp. 
Fig. 41. A very young ovule. x 260. 
Fig. 42. An older ovule, x 350. 
Fig. 43. A still older stage, x 260. 
Fig. 44. A well-formed ovule. x 100. 
Fig. 45. An ovule at about the time of fertilization. x 75. 
Fig. 46. A young seed of about four-fifths of its final length, x 20. 
Fig. 47. Structure of coat of a seed slightly younger than that shown in Fig. 46. 
X530. 
Fig. 48. Section of ripe seed, x 20. 
Fig. 49. Structure of region indicated at ‘49’ on Fig. 48. x 100. 
Fig. 49 a. Details of a part of Fig. 49. x 260. 
Fig. 50. Musa sp., an ovule. x 38. 
Fig. 50 a. A nearly or quite full-grown, but unripe, seed, x 10. 
Figs. 51-56. St relit zia Reginae, Ait. 
Fig. 51. A young ovule, x 38. 
Fig. 52. The micropylar half of an ovule at the time of fertilization. x 30. 
Fig. 53. Micropylar half of a full-grown, but unripe, seed. x 10. 
Fig. 54. Structure of coat and body of seed shown in last figure. x 75. 
Fig* 55* Section of ripe seed with embryo removed. x 3. 
Fig* 56. Structure of coat and body of ripe seed, x 100. 
PLATE IV. 
Figs. 57-70. Heliconia psittacorum , L. fil. 
Fig. 57. A young ovule. X530. 
Fig. 58. A later stage, showing two cells, i° and 2°, cut off from the embryo-sac 
mother-cell, x 200. 
Fig. 59. A still later stage, showing four cells derived from the embryo-sac 
mother-cell. xioo. 
Fig. 60. A similar stage to the last, showing cells in the series, x 100. 
Fig. 61. An older ovule, with developing embryo-sac. x 200. 
Fig. 62. Section through a loculus of the ovary with its ovule, at the time of 
fertilization, x 10. 
Fig. 63. The ovule shown in the last figure. X40. 
Fig. 64. Loculus of an ovary, with young seed. x 10. 
Fig. 65. Structure of seed coat and endocarp at stage of Fig. 64. x 260. 
Fig. 66. Micropylar end of older seed, x 75. 
Fig. 67. Structure of seed and endocarp at stage of Fig. 66. x 260. 
Fig. 68. Section of a full-grown and nearly 'ripe fruit, x 10. 
Fig- 69. Section of a ripe fruit, x 10. 
Fig. 70. Structure of ripe seed and endocarp. x 260. 
