T H 



[446 ] 



T U F 



of Barton, in the lacustrine forma- 

 tion at Ostend near Bacton in Nor- 

 folk, is now in the British Museum. 



TEO'PHI. The name given by Kirby 

 and Spence to the elementary parts 

 which enter into the composition 

 of the mouth of an insect. 



TETJNCA'TION. A term used in miner- 

 alogy, implying that a segment is 

 cut off or separated from the pre- 

 dominant form. The term may be 

 applied either to an edge, or a 

 solid angle of a crystal, and will 

 leave a face more or less large in 

 place of the edge or angta A 

 truncation is said to be oblique, 

 when the face does not make equal 

 angles with all the contiguous faces. 



TTJ'BER. In botany, a fleshy irregu- 

 lar stem produced under ground, 

 and distinguished from a root by 

 its having eyes or buds, which 

 the true root never possesses : the 

 potatoe is a familiar example. 



TUBER'CULAR. In mineralogy, a term 

 applied to those minerals whose 

 unevenness of surface arises from 

 small and somewhat round eleva- 

 tions. 



TUBICINE'LLA. (from tulicen, Lat. a 

 trumpeter.) A genus of multi valve 

 tubular shells, not spiral. Tubici- 

 nella is placed by Lamarck in the 

 order Sessile cirripedes. The tube 

 is cylindrical, and composed of six 

 elongated valves, laterally united. 

 The aperture circular, with a four- 

 valved operculum. 



TUBI'COLA. (from tufais, a tube, and 

 cola, an inhabitant, Lat.) An order 

 of Artie ulata, comprising Serpula, 

 Sabella, Terebella, Amphitrite, Sy- 

 phostoma, and Dentalium. 



TTJBI'PORA. } Organ-pipe coral, con- 



TU'BIPORE. ) sisting of tubes of a 

 stony substance, each containing a 

 polype. This genus is thus de- 

 scribed by Parkinson: "a stony 

 polypifer formed by cylindrical or 

 oval tubes, communicating laterally 

 with each other." A genus of corals 

 or zoophytes belonging to the class 



Polypifera; subregnum Cyclo-neura 

 or Radiata. There are several spe- 

 cies. In one species, Tubipora mu- 

 sica, the tubes are placed parallel 

 to each other, like the pipes of an 

 organ, with transverse partitions at 

 regular intervals : in another spe- 

 cies, Sertularia, the tubes are joined 

 together endwise, like the branches 

 of a tree, leaving lateral apertures 

 for the protrusion of the tentacula of 

 each separate polype. Lamarckpro- 

 posed to separate one species, name- 

 ly, Tubipora catenulata, or chain 

 coral, from the genus Tubipora, and 

 to place it in a distinct genus, 

 Catenipora. Tubipores are found 

 among the earliest traces of organic 

 bodies in the ancient strata. " The 

 principal generic character of Tubi- 

 pora as derived from their ascer- 

 tained structure, is, that the animal 

 substance contained in each tube so 

 communicates with the whole mass 

 by an intercurrent organization, as 

 to render it one connected system." 



TUBI'PORITE. A fossil tubipore. Many 

 marbles and pebbles are beautifully 

 marked by sections of the inclosed 

 tubiporites. 



TTJ'BULAR. In the shape of a hollow 

 tube. In botany, applied to the 

 florets of a compound flower, when 

 they form a cylindrical tube, and 

 are five-cleft. 



TUBTJLA'RTA. (from iululus, a hollow 

 pipe, Lat.) A genus of corals be- 

 longing to the class Polypifera. 

 Simple or branched tubes of a horny 

 substance, each tube containing a 

 polype. Tubularias are both fresh- 

 water and marine. 



TUBULA'RII. (tulularius, Lat.) A 

 family of the order Coralliferi, class 

 Polypi. The tubularii inhabit tubes 

 of which the common gelatinous 

 body traverses the axis, like the me- 

 dulla of a tree, the tubes being open, 

 either at their sides or summits, to 

 allow the passages of the polypi. 



^ (tuf, Fr. thfo, It.) An earthy 

 precipitate deposited from water. 



