THE COCKROACH 



an- 



com- 



Fig. 4(5. Model of Cockroach Brain, constructed from slices of wood representing 



successive sections. 



com, 



Fig. 47. Right half of Model-brain seen from the inner side, with the parts dissected 

 away, so as to show the anterior nervous mass (cauliculus). a; the median mass 

 (tralecula), m ; the mushroom-bodies (caliccs), mb; and their stems (peduncles), 

 st. The cellular cap, c, has been raised, so as to display the parts below : com, 

 is a part of the connective uniting the brain and infra-cesophageal ganglia. 

 [Figs. 45-48 are taken from Mr. E. T. Newton's paper in "Jouru. Quekett 

 Club," 1879.] 



