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Scanning electron microscopy and light microscopy demonstrate that the mature thread cells in Eptatretus deani and Myxine glutinosa consist of a single, coiled thread up to 10 cm long. Mature thread cells apparently loose the cell membrane within the slime gland before expulsion. Thus the old...
Ciliated cells in the rostral epidermis of amphioxus have been serial sectioned and examined in the electron microscope. The cells have a basal axonic process, which can be traced to the subcutaneous nepve‐bundles, and hence these cells are primary sensory cells. Apically only the cilium, which...
Vascular casting and dissection of fresh specimens had been used to investigate the arrangement of vessels before and after the gills in the head region of the eel. Arterial and venous morphology was found to be as reported in previous works, but the presence in the eel of a venous system that...
The inner ear of the caecilian Ichthyophis glutinosus is briefly described. An analysis of the fine structure of the utricular macula show the presence of several varieties of hair cells. At least one type seems to be degenerating, another developing. A slow hair cell turnover is proposed. The...
A histochemical study was made of the distribution of catecholamines and cholinesterases in two autonomic ganglia closely associated with the swimbladder of the Atlantic cod, Gadus morhua. The “swimbladder nerve ganglion” comprised large (40 μm) neurones, the majority of which are positive for...
Light and electron microscopic studies showed that the oral gland cells have two quite different zones. Medially, the basal zone is in contact with body fluids and the endostyle. Its strongly pyroninophile cytoplasm contains the extremely digitated nucleus and numerous small mitochondria....
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