GLOSSARY. 1L7 
bird, being formed by an anchylosis of the 
tarsus and metatarsus. 
Tarsus (Gr. Zarsos, the flat of the foot)—That portion 
of the posterior limb between the crus and 
metatarsus, the ankle in man. 
Temporal (L. ¢espora, the temples)——The names of 
each of a pair of bones in the skull of higher 
Vertebrata ; the squamosal of many lower 
Vertebrata. 
Temporo-parietal.—A pplied to the suture joining the 
temporal and parietal bones of the skull. 
Tetradactyle (Gr. ¢etras, four ; daktulos,a finger or 
toe).—Possessing four fingers. 
Thecodont (Gr. ¢heke, a sheath; odous, odontos, a 
tooth).— Having the teeth lodged in alveoli, 
as in the Protorosauria, a group of extinct 
Lacertilia. 
Thyro-hyal (G. ¢hureus, a shield)—Applied to two 
ossifications of the hyoid in the lower Verte- 
brata ; homologous with the great cornua of 
the hyoid bone in man. 
Thyroid (Gr. ¢hureos, a shield ; ecdos, shape).—A pplied 
to the largest cartilage of the larynx. 
Tibia (L. a flute)—The larger of the two bones of the 
leg. 
Tibiale.—A bone of the tarsus articulating with the 
tibia. 
Trabecula (L. a little rafter)—Two cartilaginous 
plates in the embryo from which the dorso- 
anterior region of the skull arises. 
