TELLINA. 105 



Tellina lacustris. Midler Verm. ii. p. 204. Schroeter 

 Fluss. p. 191. Chemnitz, vi. p. 139- }.. 13. f. 135. 

 Gmelin, p. 3242. Mat on and Racket, in Lin. Trans. 

 viii. p. 60. flood's Conch, p. 197- t. 47. f. 5. 

 Tellina, No. 25. Schroeter Einl. iii. p. 10. 

 Cardium lacustre. Montagu Test. p. S9- 

 Cyclas. Enc. Method, t. 302. f. 6. 

 Inhabits rivers, pools, and ditches. Denmark. Mailer. Bri- 

 tain. Montagu, fyc. 

 Shell about four lines long and five broad, thin, pellucid, of a 

 pale horn colour, covered with a dark brown epidermis, and 

 rather compressed, particularly round the margin ; the um- 

 bones are remarkably produced, which alone is sufficient to 

 distinguish this species from T. cornea. 



amnica. 75. Shell obliquely sub-oval, convex, 

 transversely grooved, and the umbones ob- 

 tuse. 



Tellina amnica. Midler Verm. ii. p. 205. Schroeter Fluss. 



p. 194. Chemnitz, vi. p. 138. t. 13. f. 134. Gmelin, 



p. 3242. Maton and Racket, in Lin. Trans, viii. p. 60. 



Dorset Cat. p. 31. t. 7. f. 2. a. Wood's Conch, p. loS. 



t. 47. f. 6. 

 Tellina rivalis. Maton in Lin Trans, iii. p. 44. t. 13. f. 



37 and 38. Donovan, ii. t. 64. f. 2. 

 Tellina, No. 24. Schroeter Einl. iii. p. 9- 

 Cardium amnicum. Montagu Test. p. 86. 

 Gualter, t. 7- f. CC. 

 Inhabits rivers and other fresh water streams. Denmark. 



Midler. Britain. Maton, 6jc. 

 Shell about three-eighths of an inch long, and rather broader 

 in proportion to its length than either of the preceding 

 species, from which it may be distinguished by its more oval 

 shape, its strong transverse grooves, and by the umbones, 

 which are less central. Schroeter considers Gualter's fig. 

 CC. to represent another species distinct from T. amnica, 

 see Fluss. Conch, p. 193 and 194. He ako at page 195, 

 has described another separate species of this tribe, with a 

 reference to his Tab. minor, A. f. 8. and to Gualter, t. 7- f. 

 B, and at page 197, another from Gualter, t. 7. f. A, and 

 Martini, in Berliu Mag. t. 12. f. 68. neither of which figures 

 are quoted in Gmelin, or any other work with which I am 

 acquainted. 



