Identifier: manualoffishcult00unit (find matches)
Title: A manual of fish-culture, based on the methods of the United States commission of fish and fisheries
Year: 1897 (1890s)
Authors: United States. Bureau of Fisheries Brice, John J. (from old catalog) Moore, H. F. (Henry Frank), 1867-1948 Chamberlain, F. M. (Frederick M.)
Subjects: Fish culture Oyster culture Frogs
Publisher: Washington, Govt. print. off.
Contributing Library: The Library of Congress
Digitizing Sponsor: The Library of Congress

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H and I. Two views of an egg after the blastoderm has spread considerably and the embryonic area e iswell defined. -ST. View of nnhatched embryo, which developed in a temperature of 45° F., producing distortions of tailand notochord. L. An egg-envelope with its contained embryo, forty-four hours after impregnation, viewed as a trans-parent object. M. An eg-g-envelope with its contained embryo at the beginning of the third day of development. Froma photograph. N. Anterior portion of a young fish on fourth day. To show relations of liver L to yelk Y, over whichthe portal vessel pv passes forward to empty into the venous sinus, in common with the anterior andposterior jugulars,/ and,/, ba bulbus aorta?, ve ventricle. O. View of fore part of a young fish 17 days old, from ventral side. Roport U. S. F. C. 1897. (To face page 136.) Plate 39.
Text Appearing After Image:
P. Young fish immediately after hatching, viewed as an opaque object and somewhat obliquely from one side,to display the relations of branchial and hyomandibular arcnes, and position of pectoral fin. Q. Young fish third clay after hatching, viewed as a transparent object to show extension of segmental ductforward; chorda ch, and liver L. B. Young fish 5 days after hatching, very much enlarged, and viewed as an opaque object. Only a slight rem-nant of the yelk-sack Y remains. S. Young fish IT days after hatching, viewed partly as an opaque and partly as a transparent object; py pylorusand rudimentary air-bladder above it; I intestine, filled with the remains of ingested food. The opercula arealready so far developed as partly to conceal the branchiae. MANUAL OF FISH-CULTURE. 137 found full of these eggs of different sizes. Shortly before spawning,transparent eggs of large size, contrasting strongly with the opaquegolden hue of less mature ones, will he found scattered through the still

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