168 TELLINA. TELLEN. 



teeth. The size also never exceeds a line ; and ^we hare 

 foil nd them at all times of the year, both in England and 

 Ireland, in the sandy sediment of streams, where neither 

 the T. cornea nor amnica are to be met with. v. v. 



3 TelHna amnica. River Tcllen. 



Dorset Cat. pi. J. f. 2. *.Wood t pi. 47. f. 6. 



Tellina rivalis. Linn. Tram. iii. pi. 13. f. 37, 38 Do* 

 novan, pi. 64. f. 2. 



Cardium amnicum. Montagu, p. 86. 



Shell thin, semitransparent, somewhat heart-shaped, 

 shining brownish or blueish horn-color, often yellowish to- 

 wards the margin, white when dead, regularly grooved 

 transversely, a little oblique and produced at one end ; in- 

 side blueish-white : beaks obtuse ; teeth two in one valve, 

 and two lateral ones each side, and one in the other with 

 .a single lateral one each side, which are strong and ele- 

 vated above the margin : length about a quarter of an inch ; 

 breadth three-eighths. 



In most rivers with a sandy bottom, v. v. 



4. Tellina rubra. Red Tcllen. 



Cardium rubrum. Montagu, pi. 27 > f. 4 Walker, f. 86. 



Shell oval-globular, semitransparent, smooth but not 

 glossy, or obscurely striate transversely, of an uniform rich 

 deep purple red; beaks prominent, obtuse, purple red; 

 inside dark glossy purple : hinge with two minute purple 

 teeth in one valve placed close together, in the other sinnV 

 lar teeth but placed remote so as to admit the teeth of the 

 opposite valve between them ; and in both valves a strong 

 projecting white tooth or protuberance on one side only : 

 length hardly the tenth of an inch 5 breadth a little more 

 thanlts length. 



Abundantly in the crevices of rocks in the south of De* 

 von. i). v. 



B. OvaTandfat, 5 to 15. 



5. Tellina lineata. Lmsated Tellcn. Fig. 1 6, 



Shell some what oval, flat, thin, semitransparent, rounded 

 at one end, narrowed and somewhat angular at the other, 

 sloping down the cartilage side, marked with numerous 



fine 



