_T. radiata._ The radiated Tellen. Pl. 8, fig. 5.
Shell elongated; posterior side shorter and more narrow than the anterior.
Species transversely oblong; upon the edge of the front side of either valve are rows of serrated teeth, running from the apex to the margin.
_T. bimaculata._ The double-spotted Tellen.
Species orbicular, easily known by answering to its common name.
Shell very thin, pellucid, and oval; yellowish colour, darker towards the umbo, which is nearly central, pointed and turned a little to one side; anterior side slopes to an obtuse point; posterior side large and rounded; hinge with three teeth in one valve and two in the other.
Species oval or sub-orbicular, sub-equilateral.
_T. donacina._ The Donax-like Tellen. Pl. 9, fig. 5.
Sub-oval, flattish, semi-striated and semipellucid; hinge with two teeth in one valve and one in the other; pale yellow, radiated longitudinally with pink.
Oval, flat, pointed at the smaller end and slightly reflected; pale yellowish colour, faintly striated concentrically; covered with a pale brown epidermis.
Though this genus bears a great affinity to many others, it cannot be united with any; having lateral teeth, it differs from the Psammobia; by not having the valves twisted, it differs from the Tellina; the valves closing, and having muscular impressions in the interior, render it distinct from the Lucina.
Shell equilateral, rather elongated, almost without the flexuous plait; two cardinal teeth diverging, and two remote lateral teeth, of which the anterior is but little distant from the summit.
_T. Timorensis._ The Tellinides of Timor. Pl. 8, fig. 3.
This genus was at first classed by Lamarck with the Lucina; but Cuvier, having discovered that the organization of the animals differed, made this a distinct genus, which was adopted by Lamarck.
Shell transverse, equivalve, no flexuosity; apices curved inward, opposed to each other; two primary and two lateral teeth, the posterior one nearest to the hinge; muscular impression simple, valves sometimes convex, strongly ribbed transversely, striated longitudinally, margins serrated and closely interlocking.
_C. fimbriata._ The fringed Corbis. Pl. 8, fig. 1.
Species white, rather thick, oval, a little elongated, almost equilateral; the cardinal and the lateral teeth well marked; the muscular impression anterior, rounded.