TEEEBELLUM. 28& 



riorly, slightly beaked or angulated posteriorly, the posterior 

 ventral margin having a flexuosity ; hinge with two cardinal and 

 generally two lateral teeth in each valve ; muscular impressions, 

 two in each valve, remote ; palleal impression with a large sinus. 

 — Obs. The fold or bending in the posterior margin distinguishes 

 this genus from others which it nearly resembles. It is composed 

 of some bivalves of great beauty and variety, which are found in 

 nearly all climates. Fig. 105, T. radiata, 106, T. lingua-felis. 

 Mr. Hanley's monograph of this genus in Sowerby's Thesaurus 

 Conchyliorum, contains 207 species, very variable in form. PL 

 V. fig. 105, 106. 



TELLINIDES. Lam. Fam. Nymphacea, Lam. — Bescr. Sub-equi- 

 valve, inequilateral, transverse, compressed, rounded anteriorly, 

 slightly beaked or angulated posteriorly ; hinge with two cardinal 

 teeth in each valve, and one lateral tooth in one valve, very near 

 the cardinal teeth. Muscular impressions two, distant, palleal 

 impression with a large sinus. Obs. This genus is distinguished 

 from Tellina in having but one lateral tooth near the cardinal 

 teeth. T. rosea, PI. v. fig. 107. 



TENUIPEDES. (Te^Mw, slender ; -jje^/es, feet.) The second sec- 

 tion of the order Conchifera Dimyaria, divided into the families 

 Mactracea, Corbulacea, Lithophagidse, Nymphacea. 



TEEACLITA. Schum. Conia, Auct. 



TEREBELLUM. Browne, 1756. TurriteUa, Lamarck. 



TEEEBELLUM. Lamarck, 1801. {Terebra, an augur ?) Fam. 

 Convolutse, Lam. Angyostomata, Bl. — Descr. Smooth, slender, 

 oblong, sub -cylindrical ; spire obtuse, short, sometimes hidden ; 

 (Seraphs, Montf.) aperture long, narrow posterioiiy, wider ante- 

 riorly ; outer lip slightly thickened, truncated, unconnected at 

 the base with the columella; inner lip thin, smooth, nearly 

 straight, spread over a portion of the body -whorl, continued in 

 a ridge above the sutures of the spire. — Obs. Montfort has sepa- 

 rated the fossil species with hidden spires, under the name 

 Seraphs. (T. convolutum. Lam.) Only one recent species is 

 known. Of this there are several varieties, one spotted, one 

 marked in sub-spiral lines, another in patches. It is brought 



u 



