Zygobranchia \Zyg`o*bran"chi*a\, n. pl. [NL., from Gr. ? a yoke
+ ? a gill.]
(Zo["o]l.)
A division of marine gastropods in which the gills are
developed on both sides of the body and the renal organs are
also paired. The abalone (Haliotis) and the keyhole limpet
(Fissurella) are examples.
Source: Webster's Revised Unabridged Dictionary (1913)
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Fissurella \Fis`su*rel"la\, n. [NL., dim. of L. fissura a
fissure.]
(Zo["o]l.)
A genus of marine gastropod mollusks, having a conical or
limpetlike shell, with an opening at the apex; -- called also
keyhole limpet.
Source: Webster's Revised Unabridged Dictionary (1913)
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