158 
CONCHIFERA. 
Lima. 
Oblong oval, rather inflated ; sides nearly straight half their 
distance from the beaks; ears unequal and small; surface with 
many smooth, sharp, divergent ribs, which become more 
numerous towards the margins by intervening ones. 
The Greensand, Blackdown. 
67. Pecten Stutchburiensis. —Stutchbury’s Pecten, pi. 
LXY. fig. 1. 
P. Stutchburiensis . Sowerby, Geo. Trans. 2d Ser. IV. p. 
342, pi. IS, fig. 1. 
Sub-triangular, elongated, comprossed, with upwards of 
sixty irregularly larger and smaller, close-set, scaly ribs; the 
intervening furrows with oblique striae. 
The Greensand, Blackdown. 
68. Pecten isl an dices.— The Islandic Pecten. 
P. islandic us. Brown, Recent Conch. Brit. p. 72, pi. 24, 
fig. 3. 
Rather elongated, ears unequal, the larger one with oblique 
ribs, crossed by concentric striae; surface with numerous flat, 
divergent, irregularly grouped,rough ribs, varying from seventy 
to one hundred, and which appear internally; the intervening 
furrows are reticulated. 
The Pleistocene Marino Formation, Dalmuir and Ardincaple, 
Renfrewshire, Bute, and Ayrshire. 
60. Pecten sin cos us.— The Distorted Pecten. 
P. sinuosus . Brown, Recent Conch. Brit. p. 73, pi. 24, f. 4. 
Sub-orbicular, variously distorted, one valve convex, and the 
other rather flat; irregularly and longitudinally ribbed, which 
in some shoot into foliations and spines; ears unequal, the 
larger one foliated. 
The Pleistocene Marine Formation, Ireland, and Dalmuir, 
Renfrewshire. 
70. Pecten varies. —The Variable Pecten. 
P. varius. Brown, Recent Couch. Brit. p. 72, pi. 24, f. 4. 
Oblong, nearly equivalve, with from twenty-six to thirty 
acute, divergent, spined ribs; the intervening furrows finely 
reticulated. 
The Pleistocene Marine Formation, Dalmuir, Renfrew¬ 
shire, and Ayr. 
71. Pecten subulatus. — The Elongated Pecten, pi. 
LXI.* figs. 24, 25. 
P. subulatus. Goldfuss, pi. 98, fig. 12. Portlock, Geo. 
Rep. p. 128. 
Somewhat elongated, largo andsubovate; hinge-line straight, 
ears unequal, one very small, the other large, with a hiatus at 
its lower angle in the deep valve; whole surface of the upper 
valve with very slightly raised longitudinal ribs, which, as well 
as the intervening furrows, are crossed by extremely minute 
undulating, concentric striae, quite invisible except by the aid 
of a lens ; lower valve smooth. 
The Oolite, Magiiligan, Ireland. 
72. Pecten textilis,— The Woven Pecten, pi. LXI.* 
figs. 30, 31. 
P. textilis. Goldfuss, pi. 89, fig. 3. Portlock, Geo. Rep. 
p. 129. 
Orbicular, hinge-line oblique, cars nearly equal and obtuse; 
deeper valve with numerous narrow, radiating ribs, with wide 
intervening furrows, crossed by fine concentric striae; upper 
valve nearly fiat, with close-set radiating stria?, crossed by 
numerous exceedingly fine concentric stria?, giving the 
surface a fine embroidered appearance; margin slightly cre- 
nated. 
The Oolite, Magiiligan, Ireland. 
Genus XXIII.—LIMA.— Bruguiere. 
Shell longitudinal, equivalve, inequilateral; sides somewhat 
thickened and gaping; uinbones divergent, their internal 
facets inclined outwards ; hinge provided with two lateral teeth 
one on each side in both valves, which become nearly obsolete 
in adult shells ; area between the beaks, to which the ligament 
is attached, divided ; tripartite ; the middle or hinge pit is 
rounded above, and contains the chief portion of the ligament, 
the remaining portions are attached to the somewhat elongated 
linear divisions; muscular impression lateral, sub-orbicular, 
from the inner margin of which the muscular impression of the 
mantle emanates, and, traversing the other side of the valves 
in a circuitous form, appears to terminate near the beak ; ex¬ 
ternal surface covered with a very thin epidermis. 
1. Lima gibbosa. —The Gibbose Lima, pi. LXVII. figs. 8, 9, 
L. gibbosa. Sowerby, II. p. 120, pi* 152. 
Elongated, gibbose, slightly oblique, nearly twice as long as 
wide ; cars undefined ; surface smooth, with a series of radiat¬ 
ing furrows in the centre of the valves. 
The greatest depth of the shell is near tho beaks, where it is 
nearly as deep as wide. 
The Inferior Oolite, Cotswold and Dundry. . 
2. Lima proboscidea. —The Proboscis Lima, pi. LXYII. 
fig. 20. 
L. proboscidea. Sowerby, I II. p. 115, pi. 244. 
Sub-ovate, hardly oblique, broad, convex; ears small; sur¬ 
face with about twelve elevated, rounded ribs, each furnished 
with several large tubular processes, with a funnel shaped 
termination ; variously bent and pressed to the surface. 
The Inferior Oolite, Weymouth ; Glaizedale, and Antrim, 
Ireland. 
3. Lima rudis. —Tho Rugged Lima, ph LXVI1. fig. n. 
L. rudis. Sowerby, III. p. 25, pi. 214, fig. 1. 
Obovate, oblique, inflated, somewhat longer than wide ; 
anterior ear open, with thickened lobes; the other small, with 
thick inflated edges to the valves; surface with about seven 
large, convex, rugged, longitudinal ribs; edges* of valves thick 
and reflected. 
Tho Middle Oolite, Yorkshire and Wiltshire. 
4. Lima antiquata. —The Antiquated Lima,pi. LXVII.f.7. 
L. antiquata. Sowerby, III. p. 25, pi. 214, fig. 2. 
Elliptical, depressed; anterior ear deeply wrinkled and 
open; smaller ear striated; surface with numerous coarse, 
longitudinal, irregular stria?. 
The Lias, Weston; Frethern, Vale of Evesham, and Glou¬ 
cestershire. 
5. Lima sub-ovalis. —The Sub-oval Lima, pi. LXVII. 
figs. 3, 4. 
L. sub-oralis. Sowerby, Geo. Trans. 2d Series, IV p. 342 
pi. 17, fig. 21. 
Somewhat quadrangular, elongated, with very numerous, 
divergent, rounded ribs, each of which is furnished with rather 
distant, regularly-set, obtuse scales ; the intervening furrows 
equal in breadth to the ribs. 
The Greensand, Blackdown. 
