Olfactory epithelium that is specialized for the detection of water-bo
rne odors is located in different cranial cavities in larval and postm
etamorphic Xenopus. Soybean agglutinin histochemistry reveals that bot
h 'water-noses' innervate only the ventral olfactory bulb (OB). This i
s evidence for a parcellation of the OB into a ventral portion mediati
ng information on water-soluble odorants and a dorsal part that proces
ses information on volatile substances. Copyright (C) 1996 Elsevier Sc
ience ireland Ltd.