Tel ux a. 
CONCHIFERA. 
217 
Tellina sub-rotundus. Deshayes, Coq. Foss. p. SI, pi. 12, 
tigs. 16', 17- 
Shell orbicular, deep, thick ; surface covered with numerous 
thin concentric strife ; sub-plicated on the anterior side; hinge 
with two teeth in one valve and one in the other; and with 
one lateral tooth. 
Found in the London Clay at Brack leaham. 
3. Tellina tenuis.— The Thin Tellina, pi. LXXXIX. f. 26. 
T. tenuis. Brown, Ill. Rcc. Conch. Brit. p. 100, pi. 40, 
fig. 19. 
Transversely ovate, much compressed, extremely thin and 
fragile; beaks small, nearly central; surface with extremely 
fine, concentric, irregular strife. 
The Pleistocene Marine Formation, Dalmuir, the Forth and 
Ayrshire. 
4. Tellina fabula. —False Tellina, pi. LXXXIX. fig. 34. 
T. falula. Brown, Ill. Rec. Con. Brit. p. 101, pi. 40, f. 18. 
Transversely elongated, much compressed, and flexuous, 
thin ; posterior side narrowed, and obliquely truncated ; ante¬ 
rior side rouuded ; beaks very small, and nearly central; left 
valve with very fine, regular, diagonal strice; right valve 
plain, with remote irregular concentric strife. 
T4,e Mammiferous Crag, Brain erton. 
5. Tellina donacina. —Douax Tellina, pi. LXXXIX. f. 31. 
T. donacina. Brown, Ill. ltec. Conch. Brit. p. 101, pi. 
40, fig. 16*. 
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 strife. 
The Coral Crag, Sutton. 
6. Tellina in.equalis.—T he Unequal Tellina, pi. 
LXXXIX. fig. 30. 
T. inasqualu . Sowerby, V. p. 80, pi. 4.56, fig. 2. 
Oval, convex, smooth ; anterior side obtuse, its surface with 
fine strife radiating from the beak, a little angular below ; pos¬ 
terior side longer and rounded ; beaks nearly central. 
The Lower Greensand, Parham. 
7. Tellina Branderi. —Brandor’s Tellina, pi. LXXXIX. 
fig. 27. 
T. Branded. 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 obliqua. —The Oblique Tellina, pi. LXXXIX. 
fig. 37. 
T. obliqua . Sowerby, II. p. 137, pi. 161, fig. I. 
Sub-orbicular, oblique ; 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 large. 
The Mammiferous Crag, Postwick and Ramshot; the Red 
Crag, Sutton. 
9. Tellina ovata. —Ovate Tellina, pi. LXXXIX. fig. 40. 
T. ovata. 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 splendens. —The Splendid Tellina, pi. 
LXXXIX. figs. 35, 36. 
T. splendens. Sowerby, Geo. Tr. V. p. 136, pi. 8, fig. 6. 
Transversely ovate, couvex ; beaks central, small; posterior 
side pointed and bent to the right; surface highly polished. 
The London Clay, Highgate. 
1 1. 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 strife, 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. proximo. 
Brown, Wern. Mem. VIII. pi. 1, fig. 21. 
Transversely ovate, compressed, thin ; beaks small, nearly 
central; surface with many irregular, concentric strife ; an- 
torior 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. ambigua. Sowerby, IV. p. 144, pi. 403. 
Transversely oblong-oval, rather convex, valves unequal, 
right valve thicker, curved, and inoro 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 Colwell 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. 
J5. Tellina striatula. —The Partly-striated Tellina, pi. 
LXXXIX. fig. 29. 
T. striatula. 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 strife, posterior side rounded. 
The Greensand, Blackdown. 
16. Tellina solidula, —The Thick Tellina, pi. LXXXIX. 
fig. 55. 
T. solidula. Brown, Ill. 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 transvorse, obsolete wrinkles. 
The Upper Marine Formation, Headon Hill. 
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