150 CONCHY LIA—BITHYRA 36. 



and minute zigzag brown lines; the heart-shaped impression is 

 deep, elongated, and finely striate longitudinally. 



pallida. Venus testd trigono-cordatd, ant ice product a, costis transversis 

 parallelis obsoletis confertim rettculatis, areola lievi. 

 Shell triangular heart-shaped, produced at the anterior side, 

 ■with obscure transverse parallel ribs which are crossed by fine 

 close longitudinal lines, and the areola smooth. 

 Tab. nost. 10, fig. 5. 

 BIus. nost. Found at Dawlish. 



Shell about an inch long, and nearly two broad, thin, sen)i- 

 transparent, of an ivory or yellowish-white color without marks, 

 with somewhat irregular and rather obscure trans vese rili-like 

 striae, crossed by fine longitudinal lines ; beaks prominent, 

 pointed, a little curved; both the slopes quite smooth: the mar- 

 gin thin, with the notches visible on the outside. 



ovata. Venus testd ovato-trigond, costis longituclinalibus transversim 

 squamosis, area convexd decussatd sine ktbiis. 

 Shell oval-triangular, with longitudinal ribs which are trans- 

 versely scaly, the anterior slope convex decussate and with- 

 out lips. 



Tab. nost. 9, fig. 3. 

 Venus ovata. Peymant, Zool. iv p. 206, lab. 59, fig. 3. 



Montagti, Test. Brit. p. 120. 

 Linn. Trans, viii. p. 85, tab. 2, fig. 4. 

 Turton, British Famia, p. 158. 

 Dorset Catal. p. 35, tab. 1, fig. 15. 



12. 



