GLOSS ABT. 37T 



Transverse — Crosswise. 



Trenchant — Compressed to a sharp edge. 



Truncate — Abrupt, as if cut squarely off. 



Tubercle — ^A small excrescence, like a pimple. 



Tyrrvpanum — Drum of the ear ; external in some Batrachia. 



Typical — Of a sti'ucture the most usual in a given group. 



Ulna — ^The inner or posterior bone of the fore-arm. 



Ungulate — Provided with hoofs. 



UnguieuXate — Provided with claws. 



Unicolor — Of a single color. 



Urosteget—'Yhs plates underneath the tail of a serpent. 



Vent — The external opening ot the alimentaiy canal. 



VentraZ — Pertaining to the abdomen. 



Veml/ral fins — The paired fins behind or below the pectoral flns 



in fishes, corresponding to the posterior limbs in flie higher 



vertebrates. 

 Ventral plates — Gastrosteges in sei-pents. 

 Ventricle — One of the chambers of the heart. 

 Versatile — Capable of being turned either way. 

 Vertebra — One of the bones of the spine. 

 Vertical — Up and down. 

 Vertical fins — ^The flns on the median line of the body ; the dorsal, 



anal and caudal flns. 

 Vertical plate — Central plate on the head of a serpent. 

 Villiformr—Saii of the teeth of fishes when slender and crowded 



into velvety bands. 

 Viscous — Slimy; viscid. 

 Vitta — ^A band of color. 

 Viviparous — Bringing forth living young. 

 Vomer — In fishes, the front part of the roof of the mouth ; a bone 



lying immediately behind the premaxillaries. 

 Web — The vane of a feather, on either side of the rhachis or 



" stem " ; also, the membrane connecting the toes. 

 ZygodactyU — ^Yoke-toed; having the toes in pairs — two in front, 



two behind. 

 Zygoma — The malar or cheek bone. 



