...During the period shortly before a fang is to be shed, however, its replacement becomes attached in the alternate socket; and both fangs may be functional for a short time... 
Ray D. Burkett 「Natural History of Cottonmouth Moccasin, Agkistrodon piscovorus (Reptilia)」
...At any one time four or five replacement fangs in various stages of development are found in the gum behind the functional fang...
Ray D. Burkett 「Natural History of Cottonmouth Moccasin, Agkistrodon piscovorus (Reptilia)」
...The comparative functional morphology of the pelvic appendage in three genera of Cuculidae...
William B. Stallcup 「Myology and Serology of the Avian Family Fringillidae」
...It would beuseful, and would facilitate discussion, to have data on gonadal conditionof oversummering birds; any functional enlargement wouldbe worth documenting...
Robert K Selander 「Vertebrates from the Barrier Island of Tamaulipas, México」
...It is, then, a functional affection produced by slight irritation fromwithout or by an internal cause acting upon the sensory nerves of the skin...
U.S. Department of Agriculture 「Special Report on Diseases of Cattle」
...The animal, indeed, though bordering ontyphus, will sink under the effect of functional derangement in thebreathing passages...
Honoré Bourguignon 「On the cattle plague: or, Contagious typhus in horned cattle. Its history, origin, description, and treatment」
...Broad limitsto functional reproductive activity seem to be set by thephotoperiod—neuroendocrine system...
Richard F. Johnston 「The Breeding Birds of Kansas」
...Vestigial: small or degenerate: only a trace or remnantof a previously functional organ...
John. B. Smith 「Explanation of Terms Used in Entomology」
...The male on the other hand passes into a secondlarval stage in which there are no functional legs, but rudiments oflegs and of wings are present on the epidermis beneath the cuticle, asshown by B...
Geo. H. Carpenter 「The Life-Story of Insects」
...This longer duration of thefirst stage of the poisoning process is no doubt owing to a higherorganisation and greater functional power of the motor nerve centres ofdogs...
A. Mueller 「On Snake-Poison: its Action and its Antidote」
...The muscles closing the plastron moved the moreanterior of the two hinges; the normal hinge was not functional...
John M. Legler 「Natural History of the Ornate Box Turtle, Terrapene ornata ornata Agassiz」
...The form of the stapes, tabularand otic notch suggest a functional tympanic membrane, whichcould not have occurred in a gill-breathing larva...
Theodore H. Eaton 「A New Order of Fishlike Amphibia From the Pennsylvanian of Kansas」
...Thus, it seems that in Conophis onlyone pair of grooved teeth is functional at any one time, although usually replacementteeth are present behind and beside the functional one...
John Wellman 「A Revision of Snakes of the Genus Conophis (Family Colubridae, from Middle America)」
...Such attributes arenot separable from functional attributes, but originate and existconjointly with them...
William H. Holmes 「A Study Of The Textile Art In Its Relation To The Development Of Form And Ornament」
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