KLt.I.V.V. 



CONCHIFERA. 



217 



Tcllina sub-rotinidus. Dcshayes, Coq. Foss. p. SI, pi. 12, 

 figs. IG, 17. 



Shell orbicular, deep, thick ; surface covered with numerous 

 thin concentric stri;e ; sub-plicated ou the anterior side ; hinge 

 with two teeth in one valve and one in the other; and with 

 one lateral tooth. 



Fouml in tiio London Clay at Bracklesham. 



3. Tellina tenuis.— TheThin Teliina, pi. LXXXIX. f. 26, 



T. tenuis. Brown, 111. Rec. Couch. Brit. p. 100, pi. 40, 

 fig. 19. 



Transversely ovato, much compressed, extremely thin and 

 fragile; beaks small, nearly central ; surface with extremely 

 fine, concentric, irregular strite. 



The Pleistocene Marine Formation, Dalmuir, the Forth and 

 Ayrshire. 



4-. Tei.lina fabula. — False Tellina, pi. LXXXIX. fig. 3i. 



T.fahula. Brown, 111. Rec. Con. Brit. p. 101, pi. 40, f. IS. 



Transversely elongated, much compressed, and flexuous, 

 thin ; posterior side narrowed, and obliquely truncated ; ante- 

 rior side rounded ; beaks very small, and nearly central ; loft 

 valve with very fine, regular, diagonal striae; right valve 

 plain, with remote irregular concentric striie. 



The Mammiferous Crag, Bramerton. 



o.Tellixa don'aci.va. — Douax Tellina, pi. LXXXIX. f. 31. 



T. donacina. Brown, 111. Rec. Conch. Brit. p. 101, pi. 

 40, fig. 1 6. 



Transversely oblong ovate, thin, compressed ; beaks small, 

 placed much to one side, which is sub -truncated and angular 

 below ; opposite side much rounded ; surface with fine con- 

 centric stria). 



The Coral Crag, Sutton. 



6. Tellina in.eqcalis. — The Unequal Tellina, pi. 

 LXXXIX. fig. 30. 



T. inwqiiaUs. Sowerby, V. p. 80. pi. 4.56, fig. 2. 



Oval, convex, smooth ; anterior si<le obtuse its surface with 

 fine stria) radiating from the heak, a little angular bolow ; pos- 

 terior side longer and rounded ; beaks nearly central. 



The Lower Greensand, Parliam. 



7. Tellina Branderi. — Brander's Tellina, pi. LXXXIX. 

 fig. 27. 



T. Branderi. Sowerby, IV. p. 143, pi. 402, fig. 1. 



Sub-orbicular, slightly transverse, compressed ; anterior 

 margin with a small sinus ; beaks nearly central and pro- 

 duced. 



The London Clay, Barton. 



8. Tellina ohliqija. — The Oblique Tellina, pi. LXXXIX. 

 fig. 37. 



T. ohUqna. Sowerby, II. p. 137, pi. 161, fig. 1. 



Sub-orbicular, obli(|uo ; beaks nearly central, anterior side 

 gently curving to near the centre of the valve, where there is 

 a small angle ; posterior side with a slight ridge ; surface 

 smooth, muscular impressions largo. 



The Mammiferous Crag, Postwick and Ramsbot ; the Red 

 Crag, Sutton. 



9. Tellina ovata.— Ovate Tellina, pi. LXXXIX. fig. 40. 

 T. oeaia. Sowerby, II. p. 138, pi. 161, fig. 2. 

 Transversely ovate ; anterior side with furrow, and a little 



contracted ; posterior side rounded ; surface smooth, with 

 rather regular, deeply marked lines of growth ; beaks small. 



The Mammiferous Crag, Bramerton, and the Red Crag, 

 Sutton. 



10. Tellina splenden.s. — The Splendid Tellina, pi. 

 LXXXIX. tigs. 35, 36. 



T. splendens. Sowerby, Geo. Tr. V. p. 136, pi. 8, fig. 6. 

 Transversely ovate, convex ; beaks central, small ; posterior 

 side pointed and bent to the right ; surface highly polished. 

 The London Clay, Highgate. 



11. Tellina filosa. — The Threaded Tellina, pi. LXXXIX. 

 fig. 38. 



T. Jilosa. Sowerby, IV. p. 143, pi. 402, fig. 2. 



Sub-triangular ; anterior side gently sloping above ; trun- 

 cated, with an angular point beneath ; a slight ridge and fur- 

 row emanating from the beak terminates on the base ; pos- 

 terior side rounded ; surface covered with numerous acute, 

 elevated, thread-like, concentric striio, which are enlarged an- 

 teriorly, and curved upwards as they pass over the elevation. 



The London Clay, Barton. 

 12. Tellina calcarea. — The Chalky Tellina, pi. 

 LXXXIX. fig. 41. 



T. calcarea. Chemnitz, VI. pi. 13, fig. 136. T.proxima. 

 Brown, Worn. Mem. VIII. pi. 1, fig. 21. 



Transversely ovate, compressed, thin ; beaks small, nearly 

 central ; surface with many irregular, concentric stride ; an- 

 terior .side narrowed, posterior side rounded. 



The Pleistocene Marine Formation, Dalmuir and Bute ; the 

 Mammiferous Crag, Bramerton, and the Red Crag, Sutton. 



13. Tellina ambigua. — The Ambiguous Tellina, pi. 

 LXXXIX. fig. 42. 



T. amhhjua. Sowerby, IV. p. 144, pi. 403. 



Transversely oblong-oval, rather convex, valves unequal, 

 right valve thicker, curved, and more convex than the other, 

 with one tooth only ; both sides equally rounded, beaks ob- 

 tuse and small ; surface obscurely sulcated, deeper at the sides. 



The Upper Marine Formation, Bramerton, and Culwell Bay. 



14. Tellina ampliata. — The Enlarged Tellina, pi. 

 LXXXIX. fig. 47. 



T. ampliata. Phillips, Geo. York, I. pi. 3, fig. 24. 



Sub-orbicular ; beaks nearly central ; surface with many 

 lines of growth ; anterior side straight from the beaks, with a 

 gentle ridge ; posterior side large and rounded. 



The Coral Rag, Malton, Yorkshire. 



15. Tellina striatula. — The Partly-striated Tellina, pi. 

 LXXXIX. fig. 29. 



T. siriatula. Sowerby, V. p. 79, pi. 456, fig. 1. 



Much elongated transversely ; its width double its length ; 

 rather convex, anterior side shortest, a little pointed, with a 

 slight elevation on its surface which is smooth, with a few 

 longitudinal indistinct stria;, posterior side rounded. 



The Greensand, Blackdown. 



1 6. Tellina solidula. — The Thick Tellina, pi. LXXXIX. 



fig. 55. 



T. solidula. Brown, 111. Rec. Conch. Brit. p. 101, pi. 



40, fig. 14. 



Sub-orbicular, strong, thick, convex ; anterior side arcuated, 

 with a longitudinal furrow terminating below in an angle, pos- 

 terior side rounded ; beaks nearly central and straight ; sur- 

 face smooth, with a few transverse, obsolete wrinkles. 



The Upper Marine Formation, Headon Hill. 

 2 Y 



