Terebratula. MOLLUSCA. ACEPHALA. 373 
56. T. FemSrea.— Orbicular, globose; margin undulaio-plicated. — Sower. 
Min. Conch, cccxxvi. — Under Oolite. 
57. T. cord^yom^s.— Heart-shaped, front much elevated, with a deep sinus 
in the margin ; sides rather convex, sharp-edged ; middle ornamented with 
several acute furrows, reaching almost to the beaks. — Sower. Min. Conch, 
t. ccccxcv. f 2, 4. — Carboniferous Limestone^ Ireland. 
58. T. reniformis — Reniform, middle furnished with 3 or 4 longitudinal 
ridges, terminated by acute plaits in the much elevated margin of the front ; 
sides inflated below the entire edges.— Min. Conch, t, ccccxcvi. f. 1-4. 
— Carboniferous Limestone^ Ireland. 
59. T.pMyloba. — Transversely obovate, depressed; front elevated, with 
several acute plaits in the middle of the sinus ; sides with one or two obscure 
plaits upon their edges. — Sower. Min. Conch, t. ccccxcvi. f. 5, 6. — In Carboni- 
ferous Limestone at CUtheroe. 
60. T. Pugnus. — Obovato-deltoid, rather depressed ; front much elevated, 
with from 4 to 6 plaits in the middle of the sinus ; sides convex, with several 
plaits upon their edges — Anomites Pugnus, Mart. Herb. t. xxiii. f. 4, 5. — T. 
Pug. Sower. Min. Conch, t. ccccxcvii— In Carboniferous Limestone. 
61. T. lata. — Transversely oblong, convex, regularly plaited ; front elevat- 
ed ; the perforated valve flattest, with a produced beak ; plaits 40. — Sower. 
Min. Conch, t. nii. f. 1.— In Green Sand. 
62. T. depressa. — Triangular, depressed, regularly plaited ; front elevated ; 
lateral angles rounded ; beaks produced ; plaits 20 — Sower. Min. Conch, t. Dii. 
f. 2.— In Green Sand. 
63. T. nuciformis, — Transversely oblong, globose, regularly pliated ; front 
elevated ; beak produced ; plaits 30, rounded— Min. Conch, t. nii. 
f. 3.— In Green Sand. 
64. T. acwto.— Transversely oblong, gibbose, largely plaited ; front elevat- 
ed with six plaits, of which the lateral are the largest ; beak slightly pro- 
duced ; plaits 20, sharp. — Sower. Min. Conch, t. nii. f. 4. — In Lias, Clieve 
Hill, near Cheltenham. 
65. T. plicatella. — Subglobose, rather square, plaited ; front elevated ; beak 
small, with a broad oblong concave space on each side ; plaits 40, rounded. — 
Sower. Min. Conch, t. Diii. f. 1. — In Inferior Oolite. 
66. T. smato.— Rounded triangular, convex, with a blunt margin, largely 
plaited ; beak small, with a large, nearly flat, space on each side of it ; plaits 
sharp, about 11, of which, 5 are a little raised in front. — Sower. Min. Conch, 
t. Diii. f. 2« — In Lias. 
67. T.flabellula — Depressed, plaited; plaits about 16, simple, rounded ; 
lesser valve transversely obovate ; larger valve with a straight, rectangular, 
projecting beak.— Aotfjcr. Min. Conch, t. dxxxv. f. 1 — In Oolite. 
68. l^.furcata — ^Nearly orbicular, plaited; plaits rounded, about 9 in num- 
ber, forked when full grown ; the larger valve most convex ; its beak large, 
curved.— Min. Conch, t. dxxxv. f. 2 — In Oolite. 
69. T. or6ww?am. — Uniformly convex, plaited; plaits angular, simple, 
about 15 ; lesser valve orbicular, the other with a large curved beak. — Sower. 
Min. Conch, t. dxxxv. f. 3 In Lias. 
70. T. oJfow^ra.— Oblong, gibbose, plaited; plaits 16 or more, forked, their 
edges rounded ; beaks large, broad, slightly incurved— Aower; Min. Conch, 
t. DXXXV. f. 4, 5, 6— In Green Sand. 
