New Zealand Journal of Marine and Freshwater Research abstracts
Composition and ultrastructure of holocephalan granulocytes
P. M. HINE J. M. WAIN
Fisheries Research Centre
Ministry of Agriculture and Fisheries
P.O. Box 297, Wellington, New Zealand
Abstract
Ultrastructural observations on the lymphomyeloid tissue of 4
Rhinochimaera paci-fica, 2 Harriotta raleighana, 4
Hydrolagus sp., and 4
Callorhynchus milii were correlated with blood granulocytes under the light microscope.
Rhinochimaera only had fine eosinophilic granulocytes (FG) in blood and orbital tissue, but in
Harriotta orbital tissue also contained coarse eosinophilic granulocytes similar to the eosinophils of higher vertebrates. Whereas FG of
Harriotta contained homogeneous electron-dense granules, those of
Rhinochimaera contained whorl, plate-like, and multivesiculate inclusions.
Hydrolagus sp. and
Callorhynchus also had a third granulocyte type that showed some similarities to the coarse granulocytes. They differed, however, in having granules containing a lucent core, apparently bounded by an ovoid vesicle-like inclusion that may pass from the granule into the cytoplasm. In
Hydrolagus these granules also contained tubular structures projecting from, or connecting, granules. Granulocyte interrelationships are discussed.
Keywords granulocytes; ultrastructure; holoce-phalans; chimaerids
New Zealand Journal of Marine and Freshwater Research, 1988, Vol. 22: 63-73 Crown copyright 1988 Received 21 January 1987; accepted 18 June 1987
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