spirula
Spir"u*la, n. Etym: [NL., dim. of L. spira a coil.] (Zoöl.) Defn: A genus of cephalopods having a multilocular, internal, siphunculated shell in the form of a flat spiral, the coils of which are not in contact.
Spir"u*la, n. Etym: [NL., dim. of L. spira a coil.] (Zoöl.) Defn: A genus of cephalopods having a multilocular, internal, siphunculated shell in the form of a flat spiral, the coils of which are not in contact.