290 TEEEBEATULA. 



from the East Indies. T. convolutum ; T. subulatum. PI. xxi. 

 fig. 451, 452. 

 TEEEBEA. (An augur, a 'piercer?) Fam. Purpurifera, Lam, 

 Entomostomata, Bl. — Bescr. Subulate, elongated, pointed, tur- 

 rited ; spire long, consisting of numerous whorls ; aperture 

 small, terminating in a short, reflected canal ; outer lip thin ; 

 columella tortuous ; operculum horny. The recent species are 

 mostly tropical. — Obs. Nearly all the species enumerated by 

 Lamarck and other authors are included by De Blainville in his 

 genus Subula ; those few species which that conchologist left 

 in the present genus, being shorter and more ventricose than 

 the others, approximate in shape to some of the Buccina, and 

 are distinguished by Mr. Gray under the generic name Bullia. 

 It seems strange, that De Blainville, being convinced of the 

 necessity of separating the two groups, and consequently applying 

 a new generic term to one of them, should have given that term 

 to the larger number and the more typical species of the La- 

 marckian genus. Eig. 427, Bullia vittata. (Terebra.) Pig. 428, 

 Terebra maculata. (Subula.) The Monograph of this genus in 

 the author's Thesaurus, PI. v. contains 109 species. Plates 41 

 to 45. Our Plate xx. fig. 427, 428. 

 TEEEBEALIA. Sw. A genus of " Cerithinse," Sw. thus de- 

 scribed : " Outer lip much dilated, generally uniting at its base 

 to the inner lip ; leaving a round perforation at the base of the 

 pillar ; channel truncate ; operculum round : Palustre. Mart. f. 

 1472." Sw. p. 315. 

 TEEEBEATINa SHELLS. {Terebro, to pierce.) SheUs which 

 reside in holes pierced in rocks, wood, &c. by means of some 

 corrosive secretion of the animal. Ex. Pholas, Teredo, &c. 

 TEEEBEATULA. Brug. (Terebraius, bored.) Fam. Brachio- 

 poda. Lam. — Order. Palliobranchiata, Bl. — Descr. Inequivalve, 

 equilateral, oval or sub-trigonal, ventricose or compressed, at- 

 tached by a tendon passing through an opening in the dorsal, or 

 upper and larger valve, the umbo of which advances beyond that 

 of the other valve ; hinge destitute of a ligament, with two teeth 

 in the dorsal valve, locked into corresponding cavities in the ven- 



