"The `butter-fish,' or `kelp-fish' of the colonists of New Zealand (<i>C. pullus</i>), is prized as food, and attains to a weight of four or five pounds."
<hw>Butterfly-conch</hw>, <i>n</i>. Tasmanian name for a marine univalve mollusc, <i>Voluta papillosa</i>, Swainson.
<hw>Butterfly-fish</hw>, <i>n</i>. a New Zealand sea-fish, <i>Gasterochisma melampus</i>, Richards., one of the <i>Nomeidae</i>. The ventral fins are exceedingly broad and long, and can be completely concealed in a fold of the abdomen. The New Zealand fish is so named from these fins; the European Butterfly-fish, <i>Blennius ocellaris</i>, derives its name from the spots on its dorsal fin, like the eyes in a peacock's tail or butterfly's wing.
<hw>Butterfly-Lobster</hw>, <i>n</i>. a marine crustacean, so called from the leaf-like expansion of the antennae. It is "the highly specialized macrourous decapod <i>Ibacus Peronii</i>." (W. A. Haswell.)
1880. Mrs. Meredith, `Tasmanian Friends and Foes,' p. 248:
"Those curious crustaceans that I have heard called `butterfly lobsters'. . . the shell of the head and body (properly known as the carapace) expands into something like wing-forms, entirely hiding the legs beneath them."
<hw>Butterfly-Plant</hw>, <i>n</i>. a small flowering plant, <i>Utricularia dichotoma</i>, Lab., <i>N.O. Leutibularina</i>.
<hw>Button-grass</hw>, <i>n</i>. <i>Schaenus sphaerocephalus</i>, Poiret, <i>N.O. Cyperaceae</i>. The grass is found covering barren boggy land in Tasmania, but is not peculiar to Tasmania. So called from the round shaped flower (capitate inflorescence), on a thin stalk four or five feet long, like a button on the end of a foil.
<hw>Buzzard</hw>, <i>n</i>. an English bird-name applied in Australia to <i>Gypoictinia melanosternon</i>, Gould, the Black-breasted Buzzard.