CO^CHYLIA—DITHYRA. 27. 109 



made the remark, that in the suborbicular species this dis- 

 tinction is not always present : " m suborbiculatis vix plica 

 manifesta.'''' 



Chemnitz considers it as a variety of the Tellina Gari ; but tliat 

 shell is described as either wanting the lateral teeth, or havin<; 

 them in a very obscure manner. 



Tellina testd ovato-orbiculari intequicalvi, striis transcersis 

 longitudinalibusque obsolctis, vahns bibentatis, alterd den- 

 tibtis lateralibus. 

 Shell round-oval inequivalve, with transverse stria? and obscure 

 longitudinal ones, each valve with two teeth, and one of them 

 with lateral teeth. 



Tab. nosf. 7, fig. 2. 

 Tellina crassa. Pennant, Brit. Zool. iv. p. 182, tab. 51, fig. 1. 

 Turton, Linn. Syst. iv. p. 186. 

 Montagu, Test. Brit. p. 6-5. 

 Linn. Trans, viii. p. 55. 

 Turton, British Fauna, p. 150. 

 Wood, Conch, p. 186, tab. 40, fig. I. 

 Dillwyn, Descript. Catal. p. 96. 

 Turton, Conch. Diet. p. 173. 

 Tellina reticulata. Linn. Trans, viii. p. 54, tab. 1, fig. 9 

 Pennant, Brit. Zool. iv. p. 181. 

 Turton, British Fauna, p. 150. 

 Dorset Catal. p. 30, tab. 5, fig. 4. 

 Dillwyn, Descript. Catal. p. 95. 

 Turton, Conch. Diet. p. 173. 

 Tellina proficua. Montagu, Test. Brit. p. 66. 



II. 



