CONCHIFERA. 
Anomia. 
144 
i 
front, but entirely confluent behind ; hinge ^destitute of a liga¬ 
ment or teeth. 
1. Hipponyx cornucopia.— The Horn of Plenty Hip- 
ponyx, pi. LVI.* fig. 41, 42, 43, 44, 45. 
PUiopsis comucopw . Lamarck, An. San. Vert. VI. pt. 2, 
p. 1.9. Dcsheyes, G09; Foss. pi. 2, fig. 13, 14, 15, 1G. 
Lower valve a depressed cone, with the vertex nearly cen¬ 
tral, and slightly inclining, crossed by rugose lines of growth ; 
upper valve very conical, with its apex inclining considerably; 
surface girdled by many irregular rugose lines of growth, 
with numerous slightly uudulating divergent longitudinal stria?. 
The London Clay, Bracklcsham, and Grignon, France. 
2. Hipponyx lavis. —The Smooth Hipponyx, pi. LVI.* 
fig. 4G, 4?, 48, 49, 50, 51. H.lwvis . Sowerby, Gen. Rec. 
and Foss. Shells, No. I. 
Lower valve nearly flat; upper valve oblique, extremely 
conical, and the whole surface smooth, with a few regular 
liues of growth. 
Loudon Clay, Barton, Hampshire* 
Genus XV. CALCEOLA .—Lamarck. 
Generic Character. —Shell equilateral, iuequivalve, trian- , 
gular; umbones separated by a large, depressed, irregularly 
and transversely striated, trigoual area in the lower valve, 
which is the larger of the two, and very deep, funnel-shaped, 
and obliquely truncated at its upper side; hinge margin trans¬ 
versely straight, linear, notched, and slightly toothed in the 
centre; the upper edge arcuated ; upper or smaller valve semi- 
orbicular, semicireularly striated, and serving as a lid to the 
lower valve ; internal cardinal edge furnished with two lateral 
tubercles, a central pit and smaller plate. 
1. Calceola sandalina.— The Sandal-shaped Calceola, 
pi. LVI.* fig. 52, 53. 
C. calceola . Phillips, Pal. Foss. p. 137, pi. GO, fig. 102.* 
Devonian Shales, Chircombe Bridge, near Newton, South 
Devon. 
Sub-Division II. # 
Ligament not marginal, but placed in a short hollow under 
the beak, always perceptible, and not forming a tendinous 
cord beneath. 
Family I. OSTRACEA. 
Ligament placed either interiorly or nearly so ; shell irre¬ 
gular in form, foliaceous and sometimes papyraceous. 
Sub-Division I. 
Ligament placed interiorly ; shell thin, papyraceous. 
♦ 
Genus XVI. ANOMIA.— Linnaeus, 
Generic Character .—Shell inequivalve, irregular, opercu- 
lated ; under valve flattened, with a large circular or ovate 
perforation near the hinge, and its edges turned back, through 
which protrudes a testaceous or bony, straight, elliptical oper¬ 
culum or plug, with a dilated base, by which the shell adheres 
to extraneous bodies; upper valve the larger, concave and 
entire ; ligament large, transverse, internal, placed within the 
upper valve, at the umbo, and attached to a prominent, ex¬ 
panding appendage in the depressed valve; lower valve with 
a single, orbicular, nearly central muscular impression; upper 
valve with three impressions, situated contiguous to each other, 
the largest is next the base of the shell, which is connected, by 
means of its muscle, with the plug, and the other tw r o are also 
connected, by the medium of their muscle, with the single im¬ 
pression in the louver or flattened valve. 
1. Anomia lineata. —The Lineated Anomia, pi. LVII. 
%. 5, 6,7, 8. 
A. striata. Sowerby, V. p. 32, pi. 425. 
Suborbicular, convex ; surface with fine numerous distinct 
radiating striae. 
In the adult condition it is contracted towards the beak. 
Loudon Clay, Barton and Bagnor. 
2. Anomia semistriata. —The Semistriated Anomia. pi. 
LVI. fig. 23. 
A. semistriata. Bean, Mag. Nat. Ilist. New Series, III. 
p. Gl, fig. 21. 
Elliptical, a little convex, and thick, with concentric lines of 
growth, and numerous longitudinal undulating stria?, which 
are only visible from about the centre of the valve to the 
margin ; umbo small and acute, situate nearly central. Length 
one inch, breadth three quarters. 
Cornbrash, Scarborough. 
3. Anomia aculiata. —The Spined Anomia, pi. LVII. 
% 17. 
A. aculiata. Brown, Illust. Rec. Conch. Brit. p. 70, pi. 
22, fig. G. 
Orbicular, compressed, with numerous raised divergent stria?, 
surmounted by concave obtuse murications, or spines; um¬ 
bones small, inclined ; under valve flat and smooth. Diameter 
three-eights of an inch. 
Pleistociue Marine Formation, Ayrshire, and Ireland. i 
4. Anomia epiiippium. —The Saddle-shaped Anomia, pi. 
LIX. fig. 13. 
A. ephippium . Brown, Illust. Rec. Conch., Brit. p. G9, pi. 
22, fig. ] and 4. 
Suborbicular, irregularly waved and wrinkled; one valve 
convex, the other flat; perforation rather large. 
Pleistociue Marine Formation, England and Suffolk Crag. 
5. Anomia convexa. —The Convex Anomia, pi. LVII. 
fig. 18, 19. 
A. convexa. Sowerby, Geo. Trans. 2d Scr. IV. p.338, 
pl.U,fig.7. 
Remarakably convex ; beak large and prominent; surface 
smooth. 
Lower Greensand, Shanklin, Isle of Wight. 
G. Anomia lavigata. —The Smooth Anomia, pi. LVII.* 
fig. 20, 21. 
A. laevigata. Sowerby, Geo. Trans. 2d Scr. IV. p. 338, 
pi. 14, fig. 7. 
Nearly circular, very thin and flat; surface smooth ; umbo 
hardly elevated. 
Lower Greensand, Sandgate. 
7. Anomia undulata. —The Waved Anomia, pi. LIX. 
fig. 14. 
A. undulata. Brown, Illust. Rcc. Conch. Brit. p. 69. pi 
22, fig. 2, 3. 
Strong, flat, and suborbicular, with numerous strong, elevat- 
