GLOSSARY. 



559 



Tylau'i, ?i. ^^. Pads under the toes. (123.) 



Tym'panio {bone), a. tor n. Same as Os Quadra- 

 TUM (which see). 



Tym'panum, n. Ear-drum. Also, the naked 

 inflatable air-sacs on tlie sides of the neck 

 of grouse, an enhirgement of the ordinaiy 

 cervical reservoirs of air which communicate 

 with the bronchi. 



Type, n. Way ; plan ; mode. Also, sign or 

 symbol. The type, qv typical form,, of a grouj) 

 is that which exhibits a given set of charac- 

 ters most perfectly. But the type of a genus 

 is usually the species, if any, from which the 

 generic characters were especially drawn up, 

 without reference to such qualification ; while, 

 furthermore, the type of a species, in current 

 acceptation, is merely the specimen from which 

 the species_ was originally described, even 

 though it may very inadequately represent 

 such species. 



Typ'ical, a. Of most usual structure ; adher- 

 ing strictly to a given plan of structure. (But 

 compare Type.) 



U. 



Ui/na, 11. Inner or posterior bone of forearm. 



Ul'nar, a. Pertaining to the ulna. 



Umbil'ical, a. Relating to the umbilicus. 



Umbil'icate, a. Pitted, as if with an umbilicus. 



UMBlLi'cirs, n. Navel. Pitted scar, indicating 

 point of entrance of placental vessels into the 

 foetus. Also, any similar pit or depression, 

 as that on the scape of a feather at junction 

 of rhachis and calamus. 



Unarmed Toe. Toe bearing no claw. See 

 Digitus Muticus. (133.) 



Un'ciform, a. Hooked. 



Under Jaw. See Maxdibulum. 



Under Parts. See Gastr^eum. 



Under Tail-coverts. (13.) See Crissum. 



Under Wing-coverts. (84.) See Tectkices. 



Undula'tion, n. Wavy color-marks. 



Unguic'ulate, a. Clawed. 



Unguis, n.; pi. ungues. Claw. 



Unip'arous, a. 



Same as monotokous. 



Upper Back. (58.) See Interscapilium. 



Upper Jaw. (10.) See Maxilla. 



Upper Parts. (5.) See Not^um. 



Upper Tail-coverts. (72.) See Calypteria. 



Upper Wing-coverts. (84.) See Tectrices. 



ViiJE'VM, n. Hinder half of a bird. (8.) (Lit- 

 tle used.) 



Ure'a, 71. A certain component of urine. 



Ure'ter, n. Tube conveying urine from kid- 

 ney to cloaca. 



Ure'tiira, n. Groove in penis for direction of 

 the discharge. 



U'rinary Bladder, n. A certain compart- 

 ment of the cloaca, in some birds, is so named. 



U'rine, n. Liquid excretion of the kidneys, in 

 birds voided more or less mixed with the feces. 



Uro-gen'ital or Gex'ito-u'rinary, a. Said 

 of organs common to the two offices implied 

 in the words, or of such organs regarded as 

 associate jiarts. 



Uroiiy'al, n. Median backward process of the 

 hyoid bone. 



Producing but one young. 



Uropyg'ium, 71. Rump. (60.) 



U'terus, 71. Womb. Wanting in birds ; but a 

 lower tract of the oviduct where the eggshell 

 is formed has been loosely so called. 



Vacu'ity, h. Deficiency in a part ; as, a vacu- 

 ity in the bony palate. 



Vagi'na, n. Any sheath, in general. Particu- 

 larly, the female sexual passage. In birds the 

 lowermost tract of the oviduct is sometimes 

 loosely so called. 



Vane, ?i. (151.) See Vexillum. 



Variety, ?i. A nascent species. Practically, 

 the term designates a set of objects incom- 

 pletely distinguished from others of the same 

 species, by reason of slightness of the differ- 

 ence, or presence of connecting links. 



Vas'cular, a. Permeated with bloodvessels. 

 Also equivalent to circulatory ; as, the vascu- 

 lar system. 



Vas Def'erens, 71. Tube conveying semen from 

 testes to cloaca. 



Vas'tus, a. for n. A certain muscle of the thigh. 



Vein, 7*.. Vessel conveying blood from the 

 cai)illaries to the heait. Artery carries blood 

 from the heart. 



VE'NiE Ca'v.e, 71. ptl- Large veins pouring blood 

 from the system into the heart. 



Ve'nous, a. Pertaining to a vein ; as, venous 

 blood, the venous system. 



Ven'ter, 11. Lower belly. (Not well distin- 

 guished from abdomen, and little used.) (65.) 



Ven'trad, a. Towards the belly. 



Ven'tral, a. Pertaining to the belly. 



Ven'tricle, n. Chamber of the heart, right or 

 left, whence issue the pulmonary arteries and 

 the aorta. Compare Auricle. Also, a cavity 

 of the cerebrum. 



Ven'tricous, a. Swollen ; bulbous. 



Ventric'ulus Bulbo'sus, n. Sa,me as gigcrimn. 



Ventric'ulus Succenturia'tus, 71. Same as 

 ■proventricuhts. 



Vermicula'tion, n. Very fine crosswise mark- 

 ing. 



Ver'miform, a. Shaped like a worm ; as, a 

 woodpecker's tongue. Lumbriciform is the 

 same. 



Ver'nal, a. Relating to the spring. 



Verru'cous, a. Warty. 



Ver's.\tile, 7(.. Reversible ; susceptible of 

 turning either way. 



Vertebra, 7i. ; pi. vertebrec. Any bone of the 

 spine ; any one of the backbones. 



Ver'tebral, a. Pertaining to the backbone. 



Vertebrarte'rial {canal), a. for n. Passage for 

 an artery through several cervical vertebrte. 



Ver'tebrate, a. Having a bac'kbone ; also, 

 used substantively for an animal with a back- 

 bone. 



Ver'tex, n. Crown ; highest central portion 

 of pileus. 



Vescic'ula Semixa'lis, n. A structure, im- 

 ])erfect or wanting in birds, for storage of se- 

 men. 



Vesti'ttts, a. or n. Clothed, i. e. feathered. 

 Clothing, i. e. plumage ; as, vestitus nuptvalis, 

 breeding plumage. 



