306 Lamarck’s Genera of Shells. 
often smooth, sometimes squamose, and in general adorned with 
lively colours. 
With the tellinz, as well as the donaces and capse, the 
ligament of the valves is situated on the shorter side of the 
shell, and is wholly external. The valves of the same shell, 
though equal in their contour, are not perfectly similar ; some~ 
times one is more protuberant than the other, sometimes the 
strice of one valve, or of one of its sides, are not like those on 
the other. In some species the hinge resembles that of the 
caps, but the fold on the margin distinguishes them. 
Type. Tellina radiata*. (Idem. Linn.) 
Shell oblong, longitudinally very finely striated, delicate ; 
white, with red rays. European and American Ocean. 54 Ge- 
nera. Pl. v. Fig. 46. 
2. Tellinidest. 
Shell transverse, inequilateral, rather flattened, slightly gap- 
ing at the sides, beaks small, somewhat depressed; no irre- 
gular fold on the margin. Two diverging cardinal teeth on 
each valve ; two lateral teeth, almost obsolete, on one valve, 
the posterior one near the cardinal teeth. 
The tellinides differs from the psammobia, by having lateral 
teeth ; from the tellina, by wanting the flexuous marginal fold, 
and from the lucina by its gaping, and not having the internal 
fascial impressions. 
One Species. Tellinades Timorensis. 
Shell oval-elliptical, flattened, white, rather thin, transversely 
striated, strize concentric; adepression on the anterior side of each 
valve; superior margin wavy. Indian Ocean. Pl. v. Fig. 46f. 
3. Corbis &. 
Shell transverse, equivalve, no irregular fold on the anterior 
margin; beaks curved inward, opposite to each other. ‘Two 
* Radiated, 
+ From tellina, and «Sos, form, denoting its resemblance to the preceding 
genus. 
¢ Copied from Bowdich’s figure. — Elements of Conchology. 
§ A basket. 
