88 K. KISHINOUYE. 



Fig. 45. A diagram of the brain and the cheliceral ganglia. 



Fig. 45a. A diagram of the profile view of the brain and the 

 cheliceral ganglia of an embryo in the reversion stage. 



Fief 45. A frontal section of the 1)rain of an embrvo \u tlie 

 reversion stage, showing the formation of the eye. (Agaleiiay 2 G. 



Fig. 47. A porticm of a cross section of the alxlomeii in the 

 reversion stao-e, showino- the formation of tlie hino-l)ook lamella'. 

 {Agalena). 2 F. 



Fig. 48. A sagittal section of the brain of an embryo in the 

 reversion stage, showing the formation of the posterior median eye. 

 (Agalena). 2 D. 



Fig. 49. A sagittal section of the posterior median eye of a 

 hatched embryo. {Agalenci). 2 D. 



Figs. 50, 51. Portions of frontal sections of the céphalothorax 

 in different stages of growth after the reversion of tlie embryo, show- 

 ing the development of the anterior eyes and the formati(jn of nerve 

 fibres, the tapetum, and the vitreons body. (Lycosa). Fig. 50. 2 

 F. Fig. 51. 2 D. 



Fig. 52. An oblique frontal section of the anterior lateral eye 

 of an embryo about the time of hatching. (^Lijcosa). 2 F. 



Fig. 53. A longitudinal section of the anterior median eye 

 about the time of hatching. (Lijcosa). 2 F. 



Fig. 54. A frontal section of the anterior median eyes of a 

 hatched embryo. {Lycosa). 2 D. 



Fig. 55. A sagittal section of the abdomen about the time of 

 hatching. (Lycosa). 2 B. 



