216 
CONCHIFERA. 
Tellina. 
Tho Portland Stone, Swindon. 
13. Lucina laminata. —Tho Laminated Lucina, pi. 
LXXXIX. fig. 20. 
L. laminata. Phillips, Geo. York, II. p. 20.9, pi. 5, f. 12. 
Transvorsely ovate, much compressed, slightly oblique; an¬ 
terior side very short; beaks obtuse ; posterior side large and 
rounded ; surface with transverse imbricated ridges. 
The Carboniferous Limestone, Bolland, Yorkshire. 
14. Lucina sculpt a. —Tho Engraven Lucina, pi. 
LXXX1X. fig. 8. 
L. sculpta. Phillips, Geo. York, I. pi. 2, fig. 15. 
Sub-trigonal, transversely elongated; anterior side ex¬ 
tremely short and straight, not extending beyond the obtuse 
beaks; back nearly straight; posterior side truncated ; a 
ridge extending obliquely from tho lower sido of tho beaks to 
the basal margin, which is straight; surface with transvorso 
curved ridges posteriorly, which aro abruptly angulated from 
the ridgo. 
The London Clay, Spoeton, Yorkshire. 
15. Lucina du Noyeri. —Du Noyers Lucina, pi. 
LXXXIX. fig. 21. 
L. clu Noyeri Portlock, Geo. Rep. p. 571, pi. 38, fig. 12. 
Orbicular, slightly oblique, compressed; beaks placed a 
little towards the anterior side, and protruding a little boyond 
the hinge lino; surface with fine concentric, thread-like 
stria?. 
The Carboniferous Limestone, Eifel, Tyrone, Ireland. 
1G. Lucina flexuosa. —Tho Flcxuous Lucina, pi. 
LXXXIX. fig. 22. 
L. flexuosa. Fleming, Brit. An. p. 44-2. Cn/ptodon 
flexuosa. Brown, Illust. Brit. Conch, p. 99, pi. 39, figs. 
4, 5. 
Transversely sub-globular, with a furrow, or flexure, eman¬ 
ating from tho back and terminating on tho margin ; surface 
smooth ; substance of the shell thin. 
The Pleistocene Marino Formation, Dalmuir, Clyde. 
17. Lucina undata. —Tho Waved Lucina, pi. LXXXIX. 
fig. 24. 
L. undata . Brown, Illust. Rec. Conch. Brit. p. 98, pi. 39, 
figs. 1, 2. 
Nearly orbicular, moderately convex, flexuous ; boaks pro¬ 
minent and slightly inflated; surface with numerous fino, 
close-set, irregular, concentric stria?, which, in some instances, 
run into irregular wrinkles. 
The Pleistocene Marino Formation, Ayrshire. 
18. Lucina rotundata. —The Rounded Lucina, pi. 
LXXXIX. fig. 18. 
L. rotundata. Brown, Rec. Con. Brit. p. 98. pi. 40, f. 11. 
Orbicular, moderately convex; beaks small, nearly central 
and obtuse, slightly iuflated ; surface with very fino concentric 
stria?. 
Tho Red and Coral Crags, Sutton. 
19. Lucina digit viua.—T he Finger* Striated Lucina. 
Fellina digitaria . Turton, Ann. King. IY. p. 19G. Chem¬ 
nitz, VI. pi. 12, figs. 120, 121. 
Sub-globular ; surface surrounded with uniform stria?, which 
incline obliquely towards the outer margin, like tho linos at 
the ends of the fingers, giving it tho appearance of being 
spirally striated. 
Genus XLL—CORBIS.— Cuvier. 
Shell transverse, equivalve, free, oval, thick, extremely 
vcntricose, and sub-equilateral; umbones small and incurved, 
two cardinal and two lateral teeth in each valve, the posterior 
one placed nearer to the cardinal teeth than the other, which 
is rather remote from the umbones, and situate near the termi¬ 
nation of tho ligament; two lunulato muscular impressions in 
each valve, simple, somewhat oblong in form, and placed close 
bchiud tho umbones ; pallial improssion entire, and destitute 
of a sinus ; ligament external, tho parts to which it adheres 
forming a deep groove when the valves aro closed. 
C. lewis . Plate IX. fig. 17. 
1. Cordis Lvevis. —Tho Smooth Corbis, pi. LXXXIX. 
fig. 32. 
C. lewis. Sowerbv, VI. p. 150, pi. 580. 
Slightly gibboso, transversely oval, its breadth considerably 
exceeding its length ; posterior extremity with transverse im¬ 
brications, the other portions smooth ; margin entire. 
Tho Coralline Rag, Malton, and near Oxford; and the 
Kelloways Rock, South Cave. 
2. Corbis ovalis. —Tho Oval Corbis, pi. LXXXIX. f. 28. 
C. ovalis. Phillips, Geo. York, I. pi. 5, fig. 29. 
Transversely oblong-oval; beaks rather large, promincut, 
and incurved; surface smooth, with distinct concentric lines 
of growth. 
Tho Kelloways Rock, Scarborough. 
3. Corbis UN i FORM is.—Tho Uniform Corbis, pi. LXXXIX. 
fig. 4. 
C. uniformis. Phillips, Geo. York, I. pi. 12, fig. 3. 
Oval, slightly contracted at both extremities ; beaks central, 
and hardly produced ; surface smooth, with indistinct lines of 
growth. 
The Upper Lias Shale, Whitby, Yorkshire. 
Genus XLII.—TELLINA.— Linneeus. 
Shell compressed, transverse, sub-equivalve, inequilateral; 
posterior side usually rounded; the anterior 6oraowdiat pro¬ 
duced, or beaked and angular; anterior ventral margin with 
an irregular fiexuosity ; generally with two cardinal teeth in 
each valve, but only one in some instances; usually two late¬ 
ral teeth in both valves ; but sometimes with only one, and, for 
tho most part, reinoto from the primaries; two distant mus¬ 
cular impressions; pallial impression with a very large sinus; 
ligament external. 
1. Tellina donaciales. —The Donax-liko Tellina, pi. 
LXXXIX. fig. 51. 
Tellina donaciales. Lamarck, Ann. du Mus. VII. p. 233, 
No. 5. Deshayos, Coq. Foss. p. 83, pi. 12, figs. 7, 8, 11, 12. 
Shell obliquely ovate ; sub-trigonal, inequilateral, smooth 
and thin ; anterior sido short and rounded ; very slightly in- 
flexed and sub-angulated. 
Found in tho London Clay at Iledgerly. 
2. Tellina sub-rotundus. —The Half-rounded Tellina, pi. 
LXXXIX. fig. 4G. 
