THE FOSSIL OSMUND ACEJE. 667 



Fig. 45. Bathypteris rhomboidea. Transverse section of a petiole still closer in. int. sc, internal 

 sclerenchyma ; i. par., the inner parenchyma reduced to a narrow zone. x 7. (Slide 1292.) 



Fig. 46. Bathypteris rhomboidea. Elements of internal sclerenchyma in transverse section showing 

 usual preservation. x 110. (Slide 1291.) 



Fig. 47. Bathypteris rhomboidea. Same elements showing different type of preservation. Observe the 

 intercellular spaces. x 110. (Slide 1291.) 



Plate VII. 



Fig. 48. Bathypteris rhomboidea. Transverse section of the peripheral tissues of a petiole showing 

 insertion of the spinose emergences, scl. 1 , sclerotic cores of the spines. x about 30. (Slide 1291.) 



Figs. 49 and 50. Bathypteris rhomboidea. Transverse sections of spines showing the sclerotic core, scl. 1 , 

 surrounded by a parenchymatous sheath, par. sh. x 110 and x 70. (Slides 1292 and 1290.) 



Fig. 51. Bathypteris rhomboidea. Transverse sections of free spines consisting of the sclerotic core 

 alone. x 110. (Slide 1291.) 



Fig. 52. Bathypteris rhomboidea. Longitudinal section of a spine Avith sclerotic core and parenchy- 

 matous sheath, o. par., peripheral tissue of adjoining petioles. x 70. (Slide 1297.) 



Fig. 53. Bathypteris rhomboidea. Transverse section of the end of a leaf-trace, xy. sh. scl., sclerotic 

 cells in the xylem sheath. x 55. (Slide 1292.) 



Fig. 54. Bathypteris rhomboidea. Portion of transverse section of inner margin of a leaf-trace showing 

 the sclerotic cells of the xylem sheath {xy. sh. scl.). x 200. (Slide 1292.) 



Fig. 55. Bathypteris rhomboidea. Transverse section of a diarch root. x 33. (Slide 1295.) 



Fig. 56. Bathypteris rhomboidea. Transverse section of a triarch root. x 33. (Slide 1292.) 



Plate VIII. 



Fig. 57. Anomorrhma Fischeri. Surface view of type specimen. (Photograph by Mons. R. Koch ; 

 forwarded by Mons. M. Zalessky.) Nat. size. 



Fig. 58. Anomorrhma Fischeri. A transverse section of specimen showing petioles only. x 3. 

 (Slide 1298.) 



Fig. 59. Anomorrhoea Fischeri. A transverse section showing a portion of the cortex of the stem 

 attached to the petiolar coating, Pet. sh. ; C, cortex. x 3. (Slide 1304.) 



Fig. 60. Anomorrhma Fischeri. Transverse section of the leaf-trace xylem in the cortex ; nearest the 

 stele with one protoxylem. x 63. (Slide 1304.) 



Fig. 61. Anomorrhoea Fischeri. Similar section farther out with two protoxylems. x 63. (Slide 

 1306.) 



Fig. 62. Anomorrhoea Fischeri. Similar section still farther out with three protoxylems. x 63. 

 (Slide 1305.) 



Fig. 63. Anomorrhma Fischeri. Transverse section of a free petiole, x 10. (Slide 1302.) 



Figs. 64 and 65. Anomorrhma Fischeri. Transverse sections of the ends of leaf-traces showing phloem. 

 x 85. (Slides 1298 and 1303.) 



Fig. 66. Anomorrhma Fisc/teri. Transverse section of the end of a leaf-trace showing protoxylem 

 strand, x 85. (Slide 1303.) 



TRANS. ROY. SOC. EDIN., VOL. XLVl. PART III. (NO. 23), 97 



