Ammonita. MOLLUSCA. CEPHALOPODA. 
243 
31. A. Herveyi — Gibbose, the inner whorl two-thirds concealed ribs Dll'" 
merous, sharp, bi- or tri- furcated ; aperture lunate, with obtuse angles.--. 
Sower. Min. Conch, t. cxcv — Under Oolite, near Spalden. 
32. A. Brocchii — Compressed, sides hollow ; whorls 3 or 4, half concealed, 
very round, front circular, with many obtuse ridges ; aperture lunate.— (S'ower. 
Min. Conch, t. ccii . — Under Oolite. 
33. A. annulata — Depressed, whorls 5 to 7, exposed, rounded ; ribs nu- 
merous, prominent, divided on the front ; aperture roundish — Sower. Min. 
Conch, t. ccxxii — In Lias. 
34. A. Lamberti — Depressed, inner whorls partly concealed, front sharp 
and crenated ; ribs strong, obtuse, bent over the front, alternately long and 
short, rarely furcate ; aperture lanceolate, short.. — Sower. Min. Conch, t. ccxlii. 
f. 1, 2, 3. — Upper Oolite, Weymouth. ^ 
35. A. Leachii — Depressed ; inner v/horls half concealed ; front sharp and 
crenated; ribs undulated, curved over the front, often furcate; aperture 
ovate ; like the preceding, but more gibbous, with fewer and more promi- 
nent ribs.~*S'ower. Min. Conch, t. cclxii. f. 4.— t/pper Oolite, Weymouth. 
36. A. omphaloides. — Gibbose, whorls increasing rapidly, inner ones half 
concealed, front rounded, broad ; ribs prominent, waved, bent forward in the 
middle of the front, generally furcated ; aperture transversely oblong...^ — Sower. 
Min. Concli. t. ccxlii. f. 5 . — Upper Oolite, Weymouth. 
37 . A. Strangewaysi — Discoid ; whorls 5, exposed, ^margin flattened, cari- 
nated ; inner edges of the whorls obliquely flattened ; sides nearly flat, wich 
an obscure concentric furrow ; ribs twice furrowed ; aperture oblong.— Aowm 
Min. Conch, t. ccliv. f. 1, 2, 3 — Under Oolite, Ilminster. 
38. A. falcifer. — Discoid ; inner whorls half exposed, margin convex, cari- 
nated ; inner edge of the turns elevated and obtuse ; ribs numerous, curved, 
and suddenly bent in the middle ; aperture elliptical — Sower. Min. Conch, 
t. ccliv. f. 2 — Under Oolite, Ilminster. 
39 . A. Goodhalli — -Discoid, carinated ; both edges of the whorls gradually 
rounded ; sides nearly flat ; inner whorls two-thirds exposed ; ribs large, un- 
dulated, irregular, obscurely tuberculated at each end ; keel very prominent, 
thin ; aperture oblong — Sower. Min. Conch, t. cclv.— In Green Sand, Black- 
down, Devonshire. 
40. A. Koenigi — Discoid, convex, margin rounded, whorls 6, half exposed, 
marginal undulations numerous ; central undulations few, very prominent ; 
aperture cordate, elongated. — Sower. Min. Conch, t. ccbdii. f. 1, 2, ^..^Middle 
Oolite, Kelloway. 
41. K. friplicata — Discoid, whorls 5, exposed, with two or three oblique 
contractions ; ribs straight, large, each divided into three as it passes over 
the rounded front ; aperture suborbicular — Sower. Min. Conch, t. ccxcii. 
ccxciii. f. A.— -Middle Oolite. 
42. A. hiplex.-jyisc.oidi, whorls 5, exposed, ribs numerous, small, obtuse, 
split over the rounded front ; aperture oblong. — Sower. Min. Conch, t. ccxciii. 
f 1, 2 — In Clay, but the formation unknown. 
43. A. rotunda.— Tiiscoid, ribs thick, numerous, split over the front, sides 
subventricose ; aperture orbicular -Sower. Min. Conch, t. ccxciii. f. 3.— . 
Upper Oolite. 
44. A. decipiens. — Discoid, depressed, whorls 5, exposed, rounded on the 
front, ribs large and few on the sides, numerous and small on the front ; aper- 
ture orbicular. — Sower. Min. Conch, t. ccxciv.— -In Clap, but the formation 
unknown. 
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