CONCHOLOG7. GLOSS AK Y. 



113 



above, and pono, I place. Laid 

 one upon another ; lying above. 



SU'TURE. The seam, or fine spiral 

 line which separates the whorls or 

 wreaths. 



SY'PHON From the Greek, siphon, 

 a tube. 



TACT. The sense which gives the 

 perception of touching. Touch is 

 active ; tact passive. 



TECTIBRANCHIA'TA. From tego, I 

 cover, and branchia, gills. Name 

 of an order of gasteropods. 



TEGUME'NTARY. Relating to the tegu- 

 ment or covering. . . 



TELLI'XA. In the plural tellince. 

 From the Greek, telline, a species 

 of mussel. A genus of acephalous 

 mollusks. 



TEN'TACLE. A feeler. 



TENTA'CULA. The feelers of snails. 



TENTA'CULAR. Belonging or relating 

 to tentacles. 



TENTA'CULUM. Latin. A feeler. 



TERE'BRA. Latin. From terebro, I 

 bore. A genus of gasteropods. 



TEREBRA'TULA. Plural, terebratula. 

 A genus of acephalous mollusks 

 (page 89). 



TERE'DO. Latin. A ship-worm. 



TERE'DINES. Plural of teredo. 



TERRE'STRIA. Latin. Terrestrial. 



TER'TIARY FORMA'TION, or strata. A 

 series of sedimentary rocks which 

 lie above the primary and second- 

 ary strata, and distinguished from 

 them by their organic remains. 



TE'SSELATED. Chequered like a 

 chess-board. 



TESSELA'TUS. Latin. Tesselated. 



TESTA'CEA. From the Latin, testa, a 

 shell. An order of acephala cover- 

 ed with a testaceous shell. 



TESTA'CEOUS. Consisting of carbo- 

 nate of lime and animal matter. 



TESTACE'LLA. A genus of snails 

 (page 39). 



TE'TRABRANCH. Having four bran- 

 chiae. 



TETRABRANCHIA'TA. From the Greek, 

 tetteres, four, and bragchia, gills, 

 Name of an order of gasteropods. 



TE'TRAGONAL. Four cornered. 



THORA'CIC. Belonging to the thorax. 



THO'RAX. Latin. The chest. 



TRANSVE'RSE. Placed crosswise. 

 10* 



When the breadth of a shell is 

 greater than its length, it is termed 

 transverse. 



TRAPE'ZIFORM. Shaped like a trape- 

 zium. 



TRIDA'CXA. A genus of the family 

 of Chama'cea. 



TRICO'RNIS." From the Latin, tres, 

 three, and cornw, horn. Three 

 horned. 



TRIGO'NIA. From the Greek, trigo- 

 nos, three-cornered. A genus of 

 the family of Ostracea. 



TRIGO'NAL. Three-cornered. 



TRITO'NIA. A genus of gasteropods. 



TROCHO'IDES. From the Greek, tro~ 

 chos, a wheel, and eidos, resem- 

 blance. Name of a family of gas- 

 teropods. 



TRO'CHI. Plural of trochus. 



TRO'CHUS (tro-kus}. A genus of gas- 

 teropods. 



TRUNK. The body. 



TRUN'CATE. Stunted, cut short or 

 abruptly off at the end. 



TU'BERCLE. A little knot or pimple. 



TUBE'RCULATED. Knotted or pirn- 

 pled. 



TUBERO'SITIES. Prominent knobs or 

 excrescences. 



TU'BULAR. In shape of a hollow tube 



TU'BULATE. Hollow. 



TUBULIBRANCHIA'TA. From the Latin 

 tubus, tube, and bronchia, gills. An 

 order of gasteropods which have 

 the branchias lodged in a tube 

 (page 59). 



TUNICA'TA. Name of an order of 

 acephalous mollusks. 



TU'NICATE. From the Latin, tunica, 

 a tunic. Coated. 



TUR'BINATED. Shaped like a top of 

 pear. 



TU'RGID. Swollen. 



TU'RRETED. Resembling a tower 

 with turrets. 



TU'RBO. Latin. A whirling or twist- 

 ing. A tribe of gasteropods (page 

 47). 



TURRITE'LLA. Latin. A turret. A 

 genus of gasteropods. 



UMBILI'CUS. The aperture or depres- 

 sion in the centre, round which the 

 shell is convoluted. 



UMBILI'CATED. Having a depression 

 in the centre like an umbili'cus. 



