GLOSSARY. 151 



Tu'payae (tupaia, the name given by the natives of Sumatra, 

 where and in India these animals are found). A genus of 

 the Insectivora which approach the Lemurs. 



Turbella'ria (L. turbo, I disturb). A group of free-swimming 

 organisms belonging to the division Trichoscolices, and so 

 named because of the currents they cause in the water in 

 which they live by means of their cilia. 



Tur binated (L. turbo, a turning round). The name given to 

 certain twisted bones entering into the formation of the 

 nasal and olfactory chambers. 



Tnrnicimor'phse. A group of birds. 



Tuta'mina 6'ciili (L. defences of the eye). A name sometimes 

 applied to the eyelids. 



TylS'poda (Gr. tulos, a swelling, pad ; pous,podos, a foot). The 

 Camels. 



Tym'pamun (L. a drum). The middle ear. Also a chamber 

 in the syrinx of birds. 



Typblo'pidae (Gr. tuphlos, unseen; pous, podos, a foot). A 

 group of the Ophidia. 



Typh'losole (Gr. tuphlos, unseen). A thick fold of the wall of 

 the intestine, which in the Lamellibranchiata and in the 

 earth-worms projects into the interior of the intestinal 

 cavity, and which is not seen from the exterior. 



Ty'rosin (Gr. turos, cheese). A nitrogenous compound result- 

 ing from the decomposition of proteid substances. 



U. 



Ul'na (Gr. olene, the elbow). The bone of the antebrachium, 



the proximal end of which forms the elbow in man. 

 Ul'nar. Relating to the ulna, as the ulnar artery. 

 TJlna're. A bone of the carpus which articulates with the 



ulna. 

 Ulotri'cM (Gr. oulos, woolly ; thrix, trichos, hair). The division 



of the human race which embraces all those varieties which 



have crisp, woolly hair. 

 Umbili'cal cord (L. umbilicus, the navel). The navel string. 



The cord which connects the foetus with the placenta. 

 TJmbili'cal ve'sicle (L. umbilicus, the navel). The vesicle 



which contains that portion of the vitellus which serves as 



nutriment for the embryo. 



