PAUL PELSENEEP, 
A AA 
XXX 
Eig. 7. — Transversal section of the brain of A pus, passing through the 
line f — f. Fig. 5. g 2. Second ganglionic group of the brain (ganglion of 
the first antenna), fn. Nervous fibres, joining the two ganglia, c s. As in 
Eig. 6. 
Fig. 8. Left half of a longitudinal section of the brain of Apus. fnai. 
Nervous fibres of the first antennary nerve. Other letters as in Eig. 4. 
Fig. 9. — Horizontal section of a ganglion of the abdominal cord, g g. 
The groups of ganglionic cells, c 1 and c 2. Anterior and posterior com- 
missures. has. Upper anterior nerve, nai. Lower anterior nerve, np. 
Posterior nerve, a a. Anterior mass of small cells, a p. Posterior mass of 
small cells. 
