164 SEMELIDiB. 



lamellar ; hinge with an oblique cartilage-pit in each valve ; right 

 valve with two anterior primary teeth, left valve with a single 

 primary tooth ; lateral teeth none ; pallial sinus deep. 



LEIOMYA, A. Adams, 1864. Siiell hyaline, hinge with two prom- 

 inent lateral teeth; in other respects identical with Leptomya. 

 Neseraadunca^ Gould, is the type species. 



ScROBicuLARiA, Schumacher, 1817. 



Syn. — Lavignon, Reaumur. Ligula, Mont. Listera, Turton. 

 Mactromya, d'Orb. 



JDistr. — 20 sp. Norway, Britain, Mediterranean, Senegal. 

 Fossil, 4 sp. Tertiary ; Europe. S. piperata, Gmel. (ex, 39 ; 

 cxi, 41). 



Shell oval, compressed, thin ; subequilateral ; ligament external, 

 slight ; cartilage-pit shallow, triangular ; hinge-teeth small, one 

 or two in each valve, laterals obsolete ; pallial sinus wide and 

 deep. 



Animal with the mantle open, margins denticulated ; siphons 

 very long, slender, separate, orifices plain ; foot large, tongue- 

 shaped, compressed ; palpi very large, triangular, gills minutely 

 striated, the outer pair directed dorsally. Lives buried, verti- 

 cally, in the mud of tidal estuaries, five or six inches deep. — 

 Montagu. The siphons can be extended to five or six times the 

 length of the shell. — Deshayes. The animal has a peppery taste, 

 but is sometimes eaten on the coasts of the Mediterranean. 



LuTRicoLA (Blainv., 1824), Carpenter, 1865. 



Syn. — Capsa (Bosc), H. and A. Adams. 



Distr. — L. Chemnitzii, Desh. (cxi, 42). 



Shell transversely elongately oval, cartilage-pit more vertical 

 than oblique, cardinal tooth lamellar. 



Lilt. Ghemnitzii, Desh., can be considersd as the type. H. and 

 A. Adams refer to their subgenus Capsa also a few species, like 

 Tell, lacunosa, Chemn., T. spectabilis^ Hanley, and some others; 

 these latter must form a subgenus in the Tellinidse ; they have 

 a subinternal ligament, but not a cartilage. 



lACRA, H. and A. Adams, 1858. Shell subtrigonal, somewhat 

 attenuated and produced posteriorly, subpellucid, surface of the 

 valve divaricately sulcated, cartilage-pit oblique, narrow ; one 

 cardinal tooth in each valve in front of the cartilage-pit ; lateral 

 teeth close to the cartilage-process, more prominent in the right 

 than in the left valve. 4 sp. Red Sea, Ceylon, Seychelles, Japan. 



(Edalina, Carpenter, 1866. 

 Distr. — CE. subdiaphana^ Carp, California. 

 Shell inflated, thin, equivalve, equilateral, rounded ; scarcely 

 gaping, ligament external, cartilage subexternal ; hinge with 



