224 c - M - CHILD. 



PLATE XVI. 



FIGS. 59, 60. One form of degeneration of cytophores after development of 

 spermatozoa. 



FIG. 61. Late stage of degenerating cytophore. 



FIGS. 62, A, B ; 63, A-D. Spermatogonia dividing amitotically ; from full grown 

 testes. 



FIG. 64. Half of full grown testis ; scale one half that of other figures ; a, sperma- 

 togonia ; b, early stages of spireme formation ; f, c, spireme stage ; d, preparation for 

 first spermatocytic mitosis ; e, dyads before first spermatocytic mitosis ; f, f, cytophores 

 with spermatids ; g, cytophore with degenerating nuclei and spermatozoa; h, free 

 spermatozoa ; k, k, degenerating cytophores; /, shreds of protoplasm from earlier cyto- 

 phores which have undergone degeneration. 



The following figures are from Moniezia expansa : I B, I D, 3 A, 3 B, 3 C, 4 B, 

 4 C, 9 D, 10 A, ii A, ii B, 12 A, 13 A, 13 B, 14 A, 14 B, 15, 17, 18, 20, 21, 23, 

 26, 27 D, 28, 29 E, 30 A, 30 C, 31, 32, 34, 35, 36, 37, 38, 39, 40, 42, 44, 45, 46 

 47 A, 47 B, 47 D, 48 A, 48 B, 48 C, 49, 51, 55, 57, 58, 59, 60, 61, 62 ^, 62 ^, 

 63 A, 63 5, 63 C, 63 A 64. 



The others are from M. pianissimo. 



