抄録
Points of anatomical and histological interest are: (1) The digestive tube of Barbus stigma closely resembles to that of Catla catla. (2) The buccal cavity contains the maxillary valve and the rudimentary tongue; the anterior pharynx is respiratory and gustatory and the posterior is masticatory infunction; the oesophagus opensdirectly into the intestinal bulb; a sphinctermarks the boundary between the oesophagus and intestinal bulb; the intestine is not very much coiled and the rectum is not differentiated. (3) The buccal epithelium is characterised by the polygonal, fusiform and columnar cells. The basement membrane and stratum compactum are present. (4) The pharyngeal epithelium is packed with mucous cells and taste buds and is supported by a basement membrane and stratum compactum. The adipose tissue and striated muscle fibres in the submucosa are prominent. (5) The oesophageal lining is composed of differentiated stratified epithelium and abundant taste buds and mucous cells. The longitudinal muscle bundles are dispersed in the submucosa. The circular layer of striated muscles forms a thick coat. (6) The oeso-intestinal bulb region shows mixed epithelia. (7) The carp does not have a stomach as is shown by the absence of gastric glands and the point of entrance of the choledochal duct in the intestinal bulb. The structure of intestinal bulb is similar to that of intestine. At the anus the columnar epithelium of the intestine changes over to the stratified epithelium of the skin. (8) The multicellular glands are absent throughout the digestive tube.
