TELLINA. 107 



primary teeth, with corresponding cavities in each valve, and 

 the lateral ones are long and crenulated, as also are their re- 

 ceiving grooves. The hinges of T. fluminea, and T.fluvia- 

 tilis are similar, and Schroeter suspects they are only Varieties 

 of this species. 



fluminea. 79. Shell somewhat heart-shaped, tri- 

 angular, and transversely ribbed. 



Tellina fluminea. Muller Verm. ii. p. 206. Gmelin, p. 



3243. 

 Tellina fluviatilis. Schroeter Fluss. p. 193. t. 4. f. 2. a 



and b. 

 Venus fluminea. Chemnitz, vi. p. 320. t. 30. f. 322 and 



323. 

 Venus, No. 13. Schroeter Einl. iii. p. 159- 



Inhabits the sandy bottoms of rivers in China. Midler. 



Shell about six or eight lines long, and equally broad ; ventri- 

 cose, opake, and nearly equally broad at both ends ; the 

 outer surface is green, marked with broad rather distant 

 transverse ribs, and the inside is white, with a semicircle of 

 black ; the hinge is the same as iu T.fluminalis. The shell 

 figured by Schroeter obviously belongs to this species, and 

 not to T. fluviatilis, as he imagined. 



fluviatilis. 80. Shell somewhat heart-shaped, 

 triangular, and transversely wrinkled. 



Tellina fluviatilis. Muller Verm. ii. p. 106. Gmelin, p. 



3243. 

 Venus fluviatilis. Chemnitz, vi. p. 192. t. 30. f. 321. 

 Venus, No. 12. Schroeter Einl. iii. p. loS. 



Inhabits the river at Canton. Muller. 



Shell nine lines long and eight broad, and is longer and more 

 slender than the preceding species ; the length at both ends 

 is equal, and the colour brownish green; the space be- 

 tween the elevated lines is narrower than in T. fluminea, to 

 which it is nearly allied, and most probably will prove to be 

 nothing more than a Variety, either of that species or of T. 

 fluminalis. 



hermaphrodita. 81. Shell somewhat heart-shaped, 

 triangular, thick, ponderous, coarse and very 

 smooth. 



Venus hermaphrodita. Martini Manigf. i. p. 402. t. 1. f. 

 1 and 2. Gmelin, p. 3278. 



