IQI2] 



CLAPP—ANEURA PINGUIS 



193 



Fig. 38. — The primary wall layers and sporogenous tissue differentiated; 

 X 1040. 



* 



Figs. 39, 40. — Older stages of the sporophyte; the cushion of sterile cells 

 and sporogenous tissue differentiated; X 1040. 



Fig. 41. — Older sporophyte showing the meristematic region of the 

 sporogenous tissue; X505. 



Fig. 42. — Delineation of elaterophore beginning; X505. 



Figs. 43-50. — Young elaters and spore mother cells; X 1650. 



Fig. 51. — Mature spore; X1650. 



Fig. 52. — Occasional form of mature spore; X 1650. 



Fig. 53. — Branched elaters; X830. 



Fig. 54. — Cross-section of capsule, showing lines of dehiscence; X830. 



Fig. 55.— Germinating spore, swollen; X830. 



Fig. 56. — First stage of germination; X830. 



Figs. 57, 58. — The same stages a little later; X1040. 



Figs. 59-63. — Stages in germination; spores developing on wet cotton; 

 uninfected by fungi; X830. 



Figs. 64-66. 



fungu 



Figs. 67, 68. — Older thalli showing fungus present in darkened region; 



X830. 



Fig. 69. — One of the larger thalli, developed in capsule shown in fig. 70; 



X830. 



Fig. 70. — Capsule showing thalli from split valves; X830. 

 Fig. 71. — Germinating spore without fungus: X1040. 



