454 



METAMORPHOSIS OF CRUSTACEA. 



to recognise a resemblance to Argulus armiger (fig. 6), a 

 microscopic crustaceous animal, never seen but by the Dutch 



micographer Slabber. I could not, therefore, but felicitate 

 myself upon the recovery of this long-lost type. 



Several years elapsed before I discovered this same larva in 

 its advanced state (fig. 5), which I have since found to abound 



Fig. 5. 



