368 JouRNAL oF CoMPARATIVE NEUROLOGY. 
PLATE XXIV. 
Fig. 27. Section through the brain of Palemonetes vulgaris in the 
of the mushroom bodies. 
Fig. 28. Section through the brain of Mereis. 
Fig. 29. ag Sets ealiaee ne Polynée. 
Fig. 30. a ae “ “f Lepidonotus. 
Fig. 31. gS ue He ae Limulus. 
Fig. 32. Cell from the mushroom body of the crayfish. 
Fig. 33. Section through the brain of Polynée. 
Fig. 34. ce a bt m3 Branchipus, — 
