192 UNITED STATES GEOLOGICAL SURVEY OF TUE TEKlilTOElES. 



TELLINID^E. 



Genus TELLINA, Linnaeus. 



Synon.— Tellina, Linn. (1758), Syst. Nat., ed. X, 674.— Brug. (1792), Encyc. MtSth., tab., 282.— Lam. 



(1799),Prodr.,84; and (1801), Syst., 124 ; also (1806), Ann. Mus., VII, 231 ; and (1818), 



Hist., V, 519.— J. Sowerby (1817), Min. Concb., tab., 101.— Fdruss. (1821), Tab. Syst., 



xliii.— Blainv. (1824), Diet. Sci. Nat., XXXIII, 237.— Desh. (1830), Encyc. MiStb., III. 



and (1832) t&., 1006.— Gray (1842), Syuou. Brit. Mus., 75 and 91.- Broun (1838), 



Letb., 968.— Agassiz (1839), Moul. Moll., 38.— Goldf. (1840), Petref. Germ., II, 233; ami 



of nearly all otber eoncbologists. 

 reroniea, Poli (1791), Test. Utr. Sic, I, 29; and (1795), ib., II, 252.— H. and A. Adams (1856), 



Genera Recent Moll., II, 398 (as a subgenus of Tellina).— Stoliczka (1870), Paloeout; 



Indica, III, 119 (as a subgenus of Tellina). 

 Angulus, Milhlf. (1811), Entwurf, 47.— H. and A. Adams (1856), Genera Recent Moll., II, 397 



(as a subgenus of Tellina). — Stoliczka (1870), Palasont. Indica, 118 (as a subgenus of 



Tellina). 

 Phi/lloda, Sebum. (1817), Ess., 148.— H. and A. Adams (1856), Genera Recent Moll., II, 397 



(as a subgenus of Tellina). — Stoliczka (1870), Palajout. Indica, III, 118 (as a subgenus 



of Tellina). 

 Tellinides, Lam. (1818), Hist., V, 535.— Fe>uss. (1821), Tab. Syst., xliii.— Brown (1833), Concb. 



Text., VI, ed., 152.— H. and A. Adams (1856), Genera Receut Moll., II, 398 (as a sub- 

 genus of Tellina. 

 Fabulina, Gray (1851), Brit. Acepb., aud Br., 40 (as a subgenus of Tellina). 

 Tellinella, Gray (1852), * * .— H. aud A. Adams (1856), Genera Receut Moll., II, 394 (as a subgenus 



of Tellina). — Stoliczka (1870), Palteont. Indica, III, 116 (as a subgenus of Tellina). 

 Peronosoderma (Poli), Morcb (1853), Cat. Yoldi, 12. — H. and A. Adams (1856), Genera Receut Moll., 



II, 396 (as a subgenus of Tellina).— Stoliczka (1870), Palieont. Indica, III, 116 (as a 



subgenus of Tellina). 

 Mcera, II. and A. Adams (1856), Genera Receut Moll., II, 396 (as a subgenus of Tellina). 

 Ilomala, H. and A. Adams (1656), ib., 398 (as a subgeuus of Tellina); not Homala, Ag., 1846, 



corr. of Omala, Sebum., 1817. 

 Melis, H. and A. Adams (1856), ib., 399 (as a subgenus of Tellina).— Stoliczka (1870), Palasont. 



Indica, III, 119 (as a subgenus of Tellina). 

 Homalina, Stoliczka (1870), Palseont. Indica, III, 118 (as a subgeuus of Tellina). 



Ehjm. — TelXwn, tbe Greek name for a kind of muscle. 

 Examp. — Tellina radiala, Linu. 



Shell transversely elongate-subovate, or shorter and more or less nearly 

 ovate, valves compressed, with free margins smooth within ; posterior end 

 generally narrowed, laterally deflected, and provided with an oblique, some- 

 times angular ridge, extending from the umbonal region to the posterior basal 

 extremity ; hinge with two cardinal teeth in each valve (one of which is 

 sometimes nearly obsolete), and variable, or obsolescent lateral teeth ; pallial 

 line deeply and widely sinuous ; surface smooth or striated. 



A large number of subordinate groups seem to be so closely allied to the 

 typical species of Tellina as not to admit of being more than subgenerically 

 separated. These are mainly distinguished from each other and from the 

 typical section of the genus, by differences in the variable details of the hinge- 



