98 



Fig. 63. Saliyary and tubular glands of AnurlJa. 



X 450. 

 Fig. 64. f'ommon chamber receiving the ducts of the 



tubular glands (partly diagrammatic), x 400. 

 Fig-. 65. Diagram of head showing- relations of the 



cephalic glands. x circa 65. 

 Fig. 66. Acinose gland of ventral tube in longitudinal 



section. x 450. 

 Fig. 67. Aperture of the glands of the ventral tube; 



section taken parallel with the long axis of the 



body, x 400. 

 Fig. 68. Portion of duct of salivary gland. x 500. 



Plate TIL 



Fig. 69. Group of eggs of Anuridn. x 10. 



Fig. TO. Section through nnsegmented egg (after 

 Claypole, reduced). 



Fig. 71. Egg of Anurida, showing precephalic organ 

 and developing appendages. The outer egg- 

 membrane {ch.^) has been dissected away from 

 the lower half of the egg. x ^i^). 



Fig. 72. Embryo ^4/i«m/« ; flexure almost complete. The 

 precephalic organ is seen to be degenerating 

 (after Claypole, reduced). 



Fig. 78. Embryo Anurida at the time of development 

 of the tritocerebral appendages (after 

 Wheeler). 



Fig. 74. Paramedian section to show primitive cephalic 

 ganglia about the stage in fig. 72 (after 

 Folsom, reduced.) 



Fig. 75. ^'entral aspect of cephalic region, about the 

 stage in fig. 72 (after Folsom, reduced). 



Fig. 76. Blastoderm with precephalic organ (after 

 Claypole, reduced). 



