140 
This species bears a resemblance to the Terebralula vespertilio of 
Brocci, but is not so wide, nor so distinctly trilobate. 
Greensand, Blackdown. 
110. Terebratula megatrema? —The Largely-Perforated 
Terebratula, pi. LV.* fig. 100. 
T. megatrema. Sowerby, Geo. Tr. 2d Ser. IV. p. 343, pi. 
18, fig. 3. 
Transversely obovatc, moderately convex; beak large, 
rounded and produced, with a very ample perforation; surface 
with a few largo, distant, rounded divergent ribs. 
Greensand, Blackdown. 
111. Terebratula psittacus. —The Parrot-beak Terebra¬ 
tula, pi. LV.* fig. 56, 57. 
T.psittacea. Bruguiere, Ency. Moth pi. 244, fig. 3. Tur- 
ton, Conch. Diet. pi. 11, fig. 42. Brown, Illust. Conch. Brit, 
p. G8, pi. 46, fig. 2, 3, 4. 
Convex, nearly globose; beaks greatly produced and curved; 
sides abruptly turned inwards, and provided with a few' longi¬ 
tudinal stria); front margin somewhat indented on both sides, 
and produced in the middle, invested with five longitudinal 
divergent stria); perforation subtriangular. 
Pleistocene Marine Formation, Ayrshire, Scotland; and 
Mammaliferous Crag, Bramerton. 
112. Terebratula triplicata. —The Three-plaited Terc- 
bratula, pi. LV.* fig. 60. 
T. triplicata. Phillips, Geo. York. I. p. 134, pi. 13, 
fig. 22. 
Transversely elongated ; much inflated ; beak short and ob¬ 
tuse ; upper valve convex, with three largo and deep longitu¬ 
dinal folds; under valve concave, with threo large and deep 
plaits. 
Lias, Yorkshire. 
113. Terebratula tumida. —The Tumid Terebratula, pi. 
LV.* fig. 65. 
T. tumida. Phillips, II. p. 222, pi. 12, fig. 35. 
Obovatc, tumid; beak indistinct; lower valve flatter than 
the other; surface with rather largo longitudinal ribs, 
stronger and rounded in the centre, smaller and curved on 
the sides. 
Carboniferous Limestone, Bolland. 
114. Terebratula bidens. —The Two-toothedTerebratula, 
pi. LV* fig. 95. 
T.bidens. Phillips, I. p. 134, pi. 13, fig. 24. 
Suborbicular ; beaks small; upper valve convex, lower ono 
concave, each provided with two very large central and deep 
plaits, with two tooth-like plaits in the sides. 
Lias, AVilton Castle, and Staithcs. 
115. Terebratula comta. —The Elegant Terebratula, pi. 
LV.* fig. 77, 78. 
T. comta. Phillips, Pal. Foss. p. 89, pi. 35, fig. 161. 
Oblong, convex, pentahodral ; beak long, nearly straight; 
surface with numerous rounded ribs ; front elevated. 
Devonian Shales, Newton and Barton. 
116. Terebratula ferita. —The -Terebratula, pi. 
LVI. fig. 5, 6. 
T. ferita. Phillips, Pal. Foss. p. 89, pi. 35, fig. 163. Von 
Buch, pi. 2. fig. 37, #, c. 
Subtriangular ; beak long, straight, and acute; lateral angles 
truncated, depressed; surface with a few very largo ribs, and 
deep intermediate furrows, curved on the sides, and trans- 
Terebratula. 
verscly striated; liiugo line very short and straight; space 
under the beak of lower valve depressed. 
Devonian Shales, Barton, Plymouth, and Newton. 
117. Terebratula proboscidalis. —The Trunked Tere¬ 
bratula, pi. LVI. fig. 22, 23. 
T. proboscidalis. Phillips, Pal. Foss. p. 84, pi. 34, fig. 149, 
ay b. 
Elongated ; hoak prominent; front margin broad and pro¬ 
truding ; middle of the valves uniformly convex in the centre; 
surface with numerous equal stria), which arc most conspicuous 
near the edges. 
Devonian Limestone, Hope, near Torquay. 
118. Terebratula radialis. —The Radiating Terebratula, 
pi. LVI. fig. 16, 17. 
T. radialis. Phillips, II. p. 223, pi. 12, fig. 40, 41. 
Orbicular, destitute of a mesial fold; beak slightly ele¬ 
vated, straight; surface with many equal rounded radiating 
ribs. 
Carboniferous Limestone, Bolland. 
119. Terebratula quadrata. —The Square-shaped Tere¬ 
bratula, pi. L\ r I. fig. 24, 25. 
T. quadrata. Sowerby, Goo. Tr. 2d Ser. IV. p. 338, pi. 14, 
fig. 9. 
Oblong-ovate, gibbose ; beak large ; baso nearly parallel; 
both valves with eight or nine large, rounded, longitudinal ribs. 
Lower Greensand, Hythe. 
120. Terebratula subplicata. —The Half-plaited Tere¬ 
bratula, pi. LVI. fig. 27, 28. 
T. subplicata. Mantell, Geo. Suss. p. 211, pi. 26, fig. 5, 6, 11. 
Transversely ovate; gibbous, nearly smooth; beak very 
slightly produced; upper valve convex, lower valve depressed ; 
margin serrated ; front sinuate, with three or four sharp plaits. 
Upper Chalk, near Lewis. 
121. Terebratula iiemispherica. —The Hemispherical 
Terebratula, pi. LVI. fig. 41, 42. 
T. Iiemispherica . Sowerby, VI. p. 69, pi. 536, fig. 1. 
Hemispherical; beak produced, incurved ; lesser valve nearly 
flat, with numerous longitudinal granulated ribs ; margin 
toothed. 
Great Oolite, Ancliff, Wiltshire. 
122. Terebratula rigida. —The Rigid Terebratula, pi. 
LVI. fig. 43, 44. 
T. rigida. Sowerby, VI. p. 69, pi. 536, fig. 2. 
Orbicular; beak small; lesser valvo nearly flat; larger 
valve very convex ; surface with numerous, granulated plaits, 
increasing in number towards the margin ; front even. 
Upper Chalk, Trimminghain, 
123. Terebratula striatula. —The Finer-Striated Tere¬ 
bratula, pi. LVI.* fig. 36, 27, and 3S Var. 
T. striatula. Sowerby, VI. p. 69, pi. 536, fig. 3, 4, 5. 
Mantell, Geo. Suss. p. 131, pi. 25, fig. 7, 8, and 12. Phillips, 
I. pi. 2, fig. 28. 
Longitudinally oblong-ovate, compressed; beak large, but 
short, with a large circular aperture; front truncated, some¬ 
times furnished with a sinus; surface with numorous very fine 
granulated stria), many of which are forked. 
This species is liable to considerable variety of_ form, some specimens 
being nearly orbicular. 
London Clay, Isle of Skopoy ; Upper Chalk at Norwich ; 
MOLLUSCA. 
