TELLINA. 93 



gitudinal markings, and also, by its strong lateral teeth 

 on each side. 



ealaustina. 49. Shell sub-orbicular, but dilated 

 at the anterior end ; hinge with a lateral 

 tooth in one valve. 



Tellina Balaustina. Linnaus Syst. Nat. p. 1119- Chem- 

 nitz, vi. p. 124. t. 12. f. 117. Gmelin, p. 3239. Wood's 

 Conch, p. 180. 

 Tellina tenuis. Da Costa Brit. Conch, p. 210. Donovan, 

 i. t. 19- three lower figures. Montagu Test. p. 59. Ma- 

 ton and Racket, in Lin. Trans, viii. p. 52. Dorset Cat. 

 p. 30. t. 5. f. 3. Wood's Conch, p. 155. t. 44. f. 3 

 and 4. 

 Tellina planata. Pennant Zool. iv. p. 87- t. 48. f. 29. 

 Tellina polita. Solander's MSS. Pulteney's Dorset Cat. 



p. 29. 

 Lister Conch, t. 405. f. 251. P ether Gaz. t. 94. f. 5. 

 Gualter, t. 77. f. M. 

 Inhabits the Mediterranean. Linnceus. 



Shell generally rather more than half an inch long, and nearly 

 three quarters broad ; thin, brittle, depressed, rounded at the 

 posterior, and somewhat angulated at the anterior end ; it is 

 whitish, or flesh-coloured, with reddish or yellowish transverse 

 zones, or an obsolete longitudinal ray ; the hinge is placed 

 a little on the anterior side, and has a single bifid tooth in 

 each, with a lateral tooth in only one valve. Linnaeus has 

 not given any reference, and his description is so short, that 

 it is impossible to decide with much certainty, but Chemnitz's 

 conjecture appears to me to have been well founded, that 

 this is probably the T. Balaustina ; Da Costa's T. tenuis 

 certainly agrees with it better than with T. planata, and it 

 is hardly likely that such an extremely common species as 

 this, should have been unknown to Linnaeus. 



calcaria. 50. Shell ovate, very brittle, glabrous, 

 and inflected at the anterior end ; hinge with 

 a primary cleft tootli in one valve, which 

 shuts into a cavity in the other. 



Tellina calcaria. Chemnitz, vi. p. 140. t. 13. f. 136. Gme- 

 lin, p. 3236. Wood's Conch, p. 168. 

 Tellina, No. 26. Schroeter Eint. iii. p. 10. 

 Inhabits the Coasts of Iceland, and the Ferroe Islands. 

 Chemnitz. 



