Note 74 — PART I.—MORPHOLOGY AND PHYSIOLOGY (continued 11)

Mr. J. W. Folsom, who has made the accompanying sketch of the nymph of Euphæa splendens in the Cambridge Museum, finds only seven pairs of gills, there being no traces of them on segments 1, 9, and 10. A stout trachea, he writes us, enters the base of each gill, and subdivides into several long branches, which course along the periphery. Hagen in his original account said there were eight pairs on segments 1–8 respectively.