关键词: 齐口裂腹鱼, 端脑, 形态学, 组织学

Abstract: The morphology and histology of the telecephalons of five Schizothorax prenat(Tchang) were studied by Haematoxylin-eosin and mMethylene-blue staining. It is observed that the telecephalon is well developed and consists of olfactory bulbs, olfactory stalk and cerebral hemispheres. The olfactory bulbs lie in olfactory-socket, behind olfactory capsule. It is contacted with cerebral hemispheres by olfactory stalk. The olfactory bulb shaves a lamellar structure which is composed of, from outside to inside the epithelium, the layer of the olfactory nervous fibers and the small cellular layer. The outside of the cerebral hemispheres is covered with the pallium. The paleastriatum is divied into serval arers by the longitudinal and transversal sulci. The nervous nuclei are peripherally distributed in the hemispheres. The nervous nuclei distributes in the peripher of paleastriatum and includes precommissure nucleus, dorsal olfactory nucleus, lateral olfactory nucleus, preoptic nucleus, pyriform nucleus, commissuralis lateralis nucleus and endopenduncules nucleus. The structural features of the nervous nuclei in paleastriatum are observed carefully and stated in detail.

Key words: Schizothorax prenat(Tchang) TELECEPHALON, MORPHOLOGY, HISTOLOGY