CONCHOLOGY. 
Hinge with two teeth in one or both the valves, 
and mostly remote lateral ones. Ligament on 
the shorter side. 
Includes Tellina lineata of Turton, T. punicea, 
Fabula, Donacina, bimaculata, depressa, striata, 
tenuis, crassa. 
26. Lucina, Shell somewhat orbicular, closed. 
Hinge with two or three teeth in one of the 
valves, and an internal transverse cavity on the 
anterior side; lateral teeth none. 
Includes Tellina lactea, rotundata, Radula, and 
Venus undata, 
27. Strigilla. Oval or somewhat globular, equi- 
valve, closed, with strie curved in different direc- 
tions. Hinge with one or two teeth and a lateral 
one in each valve : ligament at the longer side. 
Includes Tellina carnaria, pisiformis, divaricata. 
28. Cryptodon, Shell triangularly globular, equi- 
valve, closed. Hinge with a single obscure 
penetrating tooth and a narrow lateral cavity: 
Jateral teeth none. 
Includes Tellina flexuosa. 
29. Donax. Shell transverse, equivalve, inequi- 
lateral, the anterior side obtuse and very short. 
Hinge with two teeth in each valve, with rather 
remote lateral ones. Ligament at the shorter side. 
Includes Donax trunculus, denticulata, plebeia, 
rubra, 
30. Capsa. Shell in all respects resembling the 
Donax, but is destitute of lateral teeth. 
Includes Donax castanea, 
