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Specimens of Holopus rangii (order Cyrtocrinida) were collected by submersible at depths of several hundred meters in the Caribbean and fixed for light and electron microscopy. The presence of an anus is confirmed. However, the chambered organ and glandular axial organ peculiar to crinoids are...
The occurrence and structure of adipocytes in the larvae of two lamprey species, Geotria australis and Petromyzon marinus, were examined by electron microscopy. Adipocytes from both species possessed large electron‐dense inclusions which histochemical and energy dispersal X‐ray analyses show as...
Organ heavy metal levels, and ultrastructural localization were examined in the marine prosobranch mollusc Littorina saxatilis from a metal‐contaminated site. Copper and zinc are localized in the digestive gland, stomach and kidney. The digestive gland does not appear to be a significant site of...
Ontogenetic changes in the visual cell layer of the duplex retina during growth of the eye of the deep‐sea teleost Gempylus serpens, the snake mackerel, are illustrated by comparing the retina of a small specimen with that of a previously studied adult fish.
In the present ultrastructural study we have extended previous reports on the histological organization and cell components of the lymphohaemopoietic masses occurring in the cranium, mainly in the orbit, the preorbital canal, and the suprapalatal and coiacoid areas of the holocephalan Chimaera...
The ultrastructural study of the RA mutant of the Mediterranean fruit fly, Ceratitis capitata, has been analysed in relation to morphofunctional aspects of the cystic cells. These cells appear to be essential to the normal differentiation of the germ cell and participate actively in the release...
The ultrastructural organization of the proboscis in two species of free‐living Platyhelminthes, Psammorhynchus tubulipenis and Cytocystis clitellatus is very alike but differs from previously described species. Both sheath and cone epithelium are composed of two circumferential belts. Only the...
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