Abstract
Corresponding to the development of the subepithelial connective tissue and the papilla stems of the filiform papillae in the fore half of the dorsum linguae of hedgehog, far lower than that in man and even poorer than that in dog, the sensory fibres distributed in this part are further backward in development in hedgehog than in dog, many of the filiform papillae lacking sensory fibres altogether. Even in the cases when sensory fibres enter the filiform papillae, their terminal formations are always extremely simple, generally ending in sharp unbranched or simple branched terminations, except in very rare cases where ansiform terminations are found. No intraepithelial fibres are found here.
The fungiform papillae in hedgehog are similar to those in dog in their formation, and the development of sensory fibres penetrating into them is also much in the same stage. The rather numerous sensory fibres here also end in most cases sharply in unbranched or in simple branched endings. Intraepithelial fibres are rarely proved in the epithelium of fungiform papillae facing the oral cavity. The development of sensory fibres related with taste-buds is also very poor, but a few intra- or ex-tragemmal fibres have been found.
