434 MOLLUSCA. DONACIDiE. Capsa. 



Tellina variegata, List. Conch, t. ccclxxxiv. — D. comp. Mont. Test. Brit. 

 10G. Turt. Biv. Brit. 125. — English shores, rare. 



Length three-quarters of an inch, breadth an inch and a half; glossy, va- 

 riegated, with a white band from the beak towards the anal angle ; a few ob- 

 solete concentric furrows, the inside purple ; retral extremity more produced 

 than in either of the preceding species. 



475. D. plebeia. — Triangularly ovate, smooth, with two lon- 

 pitudinal fulvous bands. 



o 



Tellina parva, List. Conch, t. ccclxxxix. Pult. Dorset. 32. Mont. Test. 

 Brit. 107- t. v. f, 2. Turt. Biv. Brit. 12C — English and Scottish 

 shores, rare. 



Length half an inch, breadth three-quarters; broad, thick and strong; yel- 

 lowish ; the teeth large ; the fulvous bands are sometimes absent. 



476. D. rubra. — Wedge-shaped, smooth, uniformly red. 



Mont. Test, Brit. Sup. 38. Turt. Biv. Brit. 129. t. x. f. 14— Southern 

 shores of England, rare. 

 About an eighth of an inch in diameter, semitransparent ; inside reddish ; 

 beaks prominent. 



Gen. CXX. CAPSA. — Shell transverse, abbreviated an- 

 teally ; hinge with two teeth in both valves ; no lateral 

 teeth. 



477. C. castanea. — Strong, transversely oblong, with a few 

 obsolete concentric ridges. 



Donax cast. Mont. Test. Brit. 573. t. xvii. f. 2 — Capsa cast. Turt. Biv. 



Brit. 128. t. x. f. 13 Southern shores of England, rare. 



Length a quarter, and breadth half an inch ; chesnut, with a deeper co- 

 loured curved band from the hinge towards the longest side ; inside chesnut, 

 margin plain ; one of the teeth large, the other small, in each valve. 



Gen. CXXI. TELLINA.— Shell transverse or suborbicu- 

 lar, with a flexuous plait at the posterior side ; hinge with 

 two teeth in one or both valves ; lateral^ ones generally re- 

 mote. 



* With two teeth in one valve, and the shell oval. 



478. T. fragilis. — Transversely ovate, subsulcated by the 

 layers of growth ; retrally truncated. 



Penn. Brit. Zool. iv. 86. t. xlvii. f. 26 — English shores. 

 Length nine-tenths, breadth one inch and three-tenths ; white ; the left 

 valve largest ; the striae wrinkled behind the fold ; indistinct longitudinal 

 striae, and some minute oblique ones, apparently confined to the cuticle ; in- 

 side striated near the margin at which the shell is slightly bevelled ; an in- 

 distinct ridge irom the beak to the posterior muscular impression ; no lateral 

 teeth. The specimens in my possession which agree with the figure in 

 44 British Zoology," have the teeth indistinct. 



