NO. 1210. SYNOPSIS OF NORTH AMERICAN TELLINIDM— BALL. 291 



Shell tcllinoid, thin; rosiliuni short, .strong, internal; hint^e with 

 feeble laterals; sinus confluent below. 



Section QtuidraTis Bertin, 1878. Type, Tellina gargadla Linnaeus. 



Section TelUnides Lamarck, 1818. Type, Tellina timorenaw 

 Lamarck. 



Subgenus Phylloda Schumacher, 1817. Type, Tellina follacea Lin- 

 naius. 



Subgenus Moerella Fischer, 1887. Type, Tellina donacina Linnaeus. 



Moera H. and A. Adams, 1856, not Loach, 1815; Maera H. and A. 

 Adams, 1858, not Leach, 1813; Donacilla Gray, 1851, not Lamarck, 

 1812. 



c. Hinge with a single strong right anterior lateral^ closely adjacent to 

 the caTdinals^ the other laterals abse)it. 



Subgenus Angulus (Megerle em.), 1811. Type, Tellina lanceolata 

 Linnieus. 



F(d)ulina Gray, 1851, and Tellinida (sp.) auct., as of Chemnitz, 

 are synonymous. 



Section Angidus s. s. 

 Surface smooth or finely concentrically sculptured. 



Section Scissula Dall, 1900. Type, Tellina decora Say. 

 Surface obliquely grooved. 



Section Oudardia Monterosato, 1881. Type, Tellina compressa 

 Brocchi. 

 With a thick internal anterior rib. 



Section Peronidia Dall, 1900. Type, Tellina albicans Gmelin 

 {nitida auct.). 

 Peronwa Morch, 1853, not Peronea Curtis, 1821. 



Subgenus Omala Schumacher, 1817. Type, Tellina hyalina Gmelin. 

 Ilomala Agassiz, 1818, not Morch, 1853. 



? Section Homalina Stoliczka, 1871. Type, Tellina triangularis 

 Dillwyn. 



Ilomala Morch, 1853, not Agassiz, 1818? 



Genus STRIGILLA Turton, 1822. 



Type, Tellina carnaria Linnseus. 



Strigella Gray, 1812; Strlgillina. Stoliczka, 1871, not Dunkcr, 1862; 

 Liimcola Fischer, 1887, not Koch, 1816, nor Leach, 1862; Strigida 

 Pfeiffer, 1861. 



Genus TELLIDORA (Morch), 1856. 



Type, Tellina hurneti Broderip and Sowerljy. 



