90 



journal of Entomology and Zoology 



EXPLANATION OF PLATE 



Figure 1. Central nervous system of Orchestia. X10. 



Figure 2. Surface view of one of the thoracic ganglia. X?5. 



Fi K ure3. Surface view of one of the abdominal ganglia. X75. 



Figure 4. Longitudinal section through the brain. Caudal end to the top. X75. 



Figure 5. Longitudinal section of the brain; same as Fig. 4 but deeper. X75 



Figures 6 and 7. Longitudinal sections of the second ventral ganglion. C audal end 



at the top. X75. 

 figure 8 Longitudinal section through the first ventral ganglion. Caudal end at 



top. X75. 



