Venus. MOLLUSCA. VENERID^. 449 



Length half an inch, breadth three quarters ; white, with a rufous tinge ; 

 finely striated longitudinally ; beaks small, nearly central ; in each valve are 

 two strong plain teeth, and a smooth long posterior one under the cartilage. 



534. V. sinuosa. — Suborbicular, with a longitudinal sinuosity 

 from the beaks, flat transverse stria? and obscure longitudinal 

 ones. 



Perm. Brit. Zool. iv. 95. t. lv. f. 51. A. Don. Brit. Shells, t. xlii. f. 2. 

 Mont. Test. Brit. 120. Turt. Biv. Brit. 154. t. x. f. 9.— English and 

 Irish shores. 



Diameter fths of an inch ; rounded at both sides ; beaks nearly central, with 

 a heart-shaped slightly carinate impression in front ; inside rich yellow, in one 

 valve two of the teeth are cloven, and one in the other.. 



V. 535. aurea. — Transversely ovate, tumid in the middle, and 

 sloping to each side, with numerous concentric stria?, and obso- 

 lete longitudinal ones. 



Tellina fasciata, List. Conch, cccciv. f. 249. — V. nebulosa, Pult. Dor- 

 set, 34 — V. aurea, Mont. Test. Brit. 129. Turt. Biv. Brit. 154. t. ix. 

 f. 7, 8. — South of England and Ireland. 



Length about an inch ; breadth an inch and a quarter ; yellowish-white, 

 with brownish zig-zag lines ; retral extremity slightly truncated obliquely ; 

 shell at the margin of the cartilage tumid; a broad lanceolate impression be- 

 fore the beaks. 



536. V. anea. — Oval, taper, and elongated retrally, with 

 crowded transverse stria? and obscure longitudinal ones ; two 

 of the teeth cloven. 



Turt. Biv. Brit. 152. t. x. f. 7 Dublin Bay. 



" Shell an inch long, and an inch and a half broad, white, covered with a 

 shining bronzed skin, oval, convex, rounded at one end, regularly taperino-, 

 and much produced at the other, without forming any angle ; with regular 

 close set transverse stria?, and minute longitudinal lines ; beaks much point- 

 ed, curved near the larger end with an elongated areola under them ; teeth 

 strong, two of them cloven in one valve, and one in the other." 



537. V. nitens. — " Shell rhombic-oval, tumid in the middle, 

 with crowded transverse stria? and obscure longitudinal ones, and 

 the middle tooth cloven.'" 



Turt. Biv. Brit. 157- t. x. f. 8.— Dublin Bay. 

 " Shell hardly three quarters of an inch long, and a little' more in breadth, 

 resembling the V. aurea in its outline ; but there is an evident angle at the 

 posterior side, and the colour is transparent horny, with some few scattered 

 longitudinal marks. From V. ( Venerupis) virginm, it differs in having ob. 

 scure longitudinal lines, in the transverse strioe not becoming broader at the 

 posterior end, and in having only one of the teeth cloven." It is probable 

 that this and the preceding are merely varieties of V. aurea. 



EXTINCT SPECIES. 



'. 1. V. lineolata — Rather gibbous, ovato-subcordate ; four-fifths of the sur- 

 face covered with obscure zig-zag striae ; posterior side smooth ; edge entire. 

 —V. castrensis, Park. Org. Rem. iii. 187-— V. lin. Sower. Min. Conch, t. xx., 

 upper figures — Green Sand. 



vol. r. F f 



