蜗蝓鱼
Lancelet \Lance"let\, n. [Lance + -let.] (Zo["o]l.)
A small fishlike animal ({Amphioxus lanceolatus}), remarkable
for the rudimentary condition of its organs. It is the type
of the class Leptocardia. See {Amphioxus}, {Leptocardia}.
lancelet
n : small translucent lancet-shaped burrowing marine animal;
primitive forerunner of the vertebrates [syn: {amphioxus}]