SECTION OF NAKED-EYED MEDUSAZ. 129 
eeptibly impaired; but soon after this stage the 
intensity of the spasm begins to become less, and 
later still it assumes a local character. It is im- 
portant, also, to notice that at this stage the effect 
of marginal stimulation is very often that of pro- 
ducing a general locomotor contraction, and some- 
times a series of two orthree such. During recovery 
in normal sea-water all these phases occur in 
reverse order. 
