Abstract
The lateral-line system of Ericymba buccata is unique among North American cyprinids. The infraorbital (IO) and preoperculomandibular (POM) canals are greatly expanded, subdivided into chambers, and partially encased by bone. The neuromasts in the IO and POM canals are also greatly enlarged, being approximately 9 or more times larger than neuromasts in the other cephalic canals. Skin neuromasts are present, although mainly positioned in the epithelium over- lying the 10 and POM canals. Histologically, canal and skin neurcmasts are similar, although the cellular com- ponents of the latter are generally longer. The sustentacular cells of IO and POM canal neuromasts have discrete bases, but, beneath the sense cell bases, the sustentac- ular cells appear to anastomose with each other. Between sense cells, the distal ends of the sustentacular cells extend to the apical surface of the neuromast. Canal lumina are virtually mucus-free, for goblet cells are only occasionally ob- served in the stratified squamous epithelial lining. Near the canal neuromasts, the
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