Bulletin of the Bureau of Fisheries, Volumen19The Bureau, 1901 |
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Términos y frases comunes
3-jointed abdomen acetabulum anal rays animal Ascaris August base of caudal body bothria caudal fin caudal peduncle cestodes Charlevoix Clair Jennings clams color cysts distal Distance from snout Distomum dorsal fin dorsal rays dorsal spine East Harbor Ehrenberg female fifth foot fifth pair figs Fish Commission furca genital genus Gosse Height of longest Hempel Hydranths Hydrothecæ Illinois River inner ramus interorbital space intestine joint of inner July Lake Erie Lake Erie Kellicott Lake St larvæ lateral line Linton lobes lobsters male maxilliped Mecosta County millimeters mouth nematodes Number of scales opercle oral sucker outer ramus ovary pair of feet pedicels plate posterior antennæ posterior end proboscis rami Rhynchobothrium River at Havana rotifer Rudolphi Sandusky Bay side slender soft dorsal South Bass Island species specimens spiral valve star-fish stars stomach surface Swamp synapta teeth tentacles thoracic segment transverse upper Waters connected Woods Hole
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Página 230 - ... during the latter part of June and the early part of July, but leaves the latter part of the summer poorly occupied.
Página 263 - ... inches in length, alive or dead, cooked or uncooked, measured in manner as follows: taking the length of the back of the lobster measured from the end of the bone of the nose to the center of the rear end of the body shell ; and any lobster shorter than the prescribed length when caught shall be liberated alive at the risk and cost of the parties taking them, under a penalty of one dollar for each lobster so caught, bought...
Página 263 - Its back measured from the bone of the nose to the end of the bone of the middle flipper of the tail; which said lobsters when caught being shorter than ten and one-half inches In length measured in manner aforesaid...
Página 216 - When, in addition to these facts, we take into account the extraordinary voracity of the young stars, their immense numbers, and their special fondness for oysters, we are led to conclude that one reason why a considerable set of oysters is so rarely obtained below low water is that they fall prey to the starfish. The oysters which set above high water are comparatively safe, for when the tide leaves them uncovered they can endure for hours the direct heat of the sun, which would kill the young starfish...
Página 264 - ... sold by the officer making the seizure thereof, at such time and in such manner as shall by him be deemed proper...
Página 72 - ... not in a position to differentiate new forms. Such work he describes as a positive injury to science and a nuisance to all careful scientific students. It is to be hoped that everyone wishing to describe a new species of rotifer will learn by heart and inwardly digest this sentence. In the very next paragraph the journal refers to a contribution on this subject to the •' Trans. New Zealand Inst.,
Página 110 - ... all or revolves only very slowly. In consequence of this it is easy to determine the relation of the direction of turning to the differentiations of the body. The reaction to heat and cold is in essentials identical with that of O. fallax, and this reaction is repeated till the animals are carried into a region where the temperature is not such as to cause the reaction. Those that are carried into such a region will of course be swimming away from the stimulating region ; hence, in a large number...
Página 42 - In 1892 there were 25 acres that wore quite productive, about one-third of the entire catch of the section being obtained from them. The catch from these lots is not definitely known, but is estimated at about 2,500 barrels. The cultivated clams possess some advantage over the natural growth from the fact that they are more uniform in size and are as large us the best of the natural olams.
Página 214 - set," it attaches itself to some object, like a spear of eelgrass, by the suckers, shown at the top of the figure, and then a rapid transformation occurs. The whole superstructure above the disk collapses and becomes absorbed like the tail of a tadpole. In a few hours the brachiolarian has disappeared, and a star-fish proper has taken its place.
Página 104 - A List of the Protozoa and Rotifera found in the Illinois river and adjacent lakes at Havana, 111.