CONCHYLIA— /)/77/l«/J. 26. 85 



26. PSAMMOBIA— /..i3i.4«(:7i'. 



Testa transversa, oblonga vel ovala, a-quivalvis, hderibus sub- 



hiantibtis. Cardo deniibus subhinis : lateralihvs nuUis. 



Liigamentum exlernmn. 

 Shell transverse, oblong or oval, equivalve, mostly open at the 



sides. Hinge with two teeth in one or both the valves: lateral 



teeth none. Ligament external. 



This genus comprehends such species of the Linnean Tellina as 

 have no lateral teeth, and of tlie Solen as have not a linear form 

 with the hinge close to one end. 



From other genera which resemble it in the structure or number 

 of the teeth, it differs in gaping more or less at the sides. 



* Valvd alterd bidentatd. 1-5. 

 With two teeth in one of tlie valves only. 



PsAMMOBiA testd ovato-oblongd Icevi, costd longitudinali inter nd, i*Diat«. 



dente altera apice complanato. 

 Shell oval-oblong smooth, with a longitudinal rib on the inside, 

 and one of the teeth flattened at the top. 

 Tab. nost. 8, fig. 3. 

 Solen fragilis. Montagu, Test. Brit. p. 51, Suppl. p. 26. 

 Pennant, Brit. Zool. iv. p. 174. 

 Dorset Catal. p. 28, tab. 4, fig. 5. 

 Wood, Conch, p. 126, tab. 29, fig. 4, 5, 

 Dillwyn, Descript. Catal. p. 65. 



