USED IN NATURAL HISTORY. 



151 



tube; branchta, gills. An order 

 of gasteropods which have the 

 branchiae lodged in a tube. (p. 

 59, Book v). 



TU'FA. It. A volcanic rock, com- 

 posed of an agglutination of frag- 

 mented scoriae. 



TUFA'CEOUS. Having the texture of 

 tufa. 



TU'NICA. Lat. A tunic; a coat or 

 covering of an organ. 



TUNICA'TA. Name of an order of 

 acephalous mollusks. 



TU'NICATE. fr. lat. tunica, a tunic. 

 Coated. 



TURBINA'TA. ) Lat. Shaped like 



TURBIXA'TUM. a top. 



TUB'BIXATED. Shaped like a top 

 or pear; having a screw -like 

 form. 



TU'RBO. Lat. A whirling or twist- 

 ing. A tribe of gasteropods. (fig- 

 43, p. 47, Book v). 



TUR'DUS. Lat. A thrush. 



TU'RGID. Swollen. 



TU'RIO. In botany, a scaly bud, de- 

 veloped from a perennial subter- 

 ranean root. 



Tu'RatroisE. A blue mineral found 

 in Persia; its colour depends on 

 the presence of the oxide of cop- 

 per. 



TU'RRETED. ) Resembling a 



TlIRRl'cULATED. $ tOWCT With 



turrets. 



TCR'RILITES. A fossil mollusk, the 

 shell of which is spiral, turricu- 

 lated and multilocular. (fig. 131, 

 p. 72, Book viii). 



TCRRITE'LLA. Lat. A little tower 

 or turret. A genus of gastero- 

 pods. 



TWI'NINO. In botany, ascending 

 spirally. 



TYM PANCM. Lat. A drum. The 

 drum of the ear. 



TTPU'LOPS. Gr. One who is blind. 

 Name of an ophidian. 



Tr'poLiTK. fr.gr. tupos, a figure; 

 lithos,a. stone. The fossil impres- 

 sion of an animal or plant in a 

 rock. 



TYHA'STTUS. Lat. A tyrant. A ge- 

 nus of birds. 



ULI'GINOUS. fr. lat. uligo, uliginis, 

 ooziness. In botany, growing in 

 damp or rrrarshy situations. 



UI/NA. The bone of the fore-arm, 

 which forms the prominence of 

 the elbow, during the flexion of 

 that joint. 



UI/ITAH. Relating to the ulna. 



U'LULA. Lat. An owl. 



UM'BEL. fr. lat. umbella (fr. umbra, 

 a shadow), a screen; a round 

 head of flowers. A form of in- 

 florescence in which several pe- 

 duncles expand, so as to produce 

 a flower somewhat resembling a 

 parasol, when open. 



UMBELLI'FEHJE fr. lat. umbella, a 

 round head of flowers ; fero, I 

 bear. Name of a family of plants. 



UMBELLI'FEROUS. Belonging to um- 

 belliferse. Bearing umbels. 



UM'BELLULES. The divisions of an 

 umbel. 



UMBE'LUJS. Lat. Specific name of 

 the ruffed grouse. 



UMBILI'CATED. Having a depres- 

 sion in the centre, like an umbi- 

 licus. 



UMBILI'CUS. Lat. dimin. of umbo. 

 The hollow axis of spiral shells; 

 the aperture or depression in the 

 centre, round which the shell is 

 convoluted. In botany, the syno- 

 nym of Lilian. 



U'MBO. Lat. A protuberance or 

 boss of a shield. In conchology, 

 that point in a bivalve which con- 

 stitutes the nucleus or apex of 

 each valve, and which is gene- 

 rally situated above the hinge, 

 and always near to it. 



UM'BONATE. Bossed; having a 



raised knob in the centre. 



UM'BOITES. Lat. plur. of umbo. 



UMBRI'N A. Generic name of a fish. 



UNARMED. In botany, destitute of 

 prickles or spines, which are th 

 arms of plants. 



UARTI'CCLATEI/. Not jointed. 



