Then there is the question of sea-sickness. Nothing is so favourable to that diversion as slowly towing a dredge. I used to take the chance of being ill, and often suffered that for which no other joy than the hauling in of a rich dredgeful of rare sea creatures could possibly compensate, or induce me to take the risk (as I did again and again). I remember lying very ill on the deck of a slowly lurching "lugger" in a heaving sea off Guernsey, when the dredge came up, and as its contents were turned out near me, a semi-transparent, oblong, flattened thing like a small paper-knife began to hop about on the boards. It was the first specimen I ever saw alive of the "lancelet" (Amphioxus), that strange, fish-like little creature, the lowest of vertebrates. I recognized him and immediately felt restored to well-being, seized the young stranger, and placed him in a special glass jar of clear sea-water. A few years later the fishermen at Naples would bring me, without any trouble to myself, twenty or more any day of the week ("cimbarella" they called them), and I not only have helped to make out the cimbarella's anatomy, but also to discover the history of the extraordinary changes it undergoes as it grows from the egg. I sent my pupil Dr. Willey, now professor in Montreal, one summer to a nearly closed sea-lake, the "pantano" of Faro, near Messina, where the lancelet breeds. He brought home hundreds of minute young in various stages, and again later made a second visit to that remote sea-lake in order to complete our knowledge of their growth and structure by observation on the spot.