C/UCULL.EA. 
CONOHIFERA. 
193 
Obliquely wedge-shaped ; length and breadth nearly equal; 
anterior side pointed, with a ridge running from the beaks to 
the margins ; surface very smooth. 
Greensand, Blackdown. 
6. Cucull.ea fibrosa. — The Fibrous Cucullaea, pi. 
LXXVII. fig. 40. 
C. fibrosa. Sowcrby, III. p. 9, pi. 207, fig. 2. 
Gibbose, ovato; width somewhat more than the length ; an¬ 
terior margin straight, and prominent near the hinge ; surface 
with numerous elevated, longitudinal stria), crossed by lines of 
growth. 
Greensand, Blackdown. 
7. CuctJLLiEA elongata. —The Elongated Cucutkea, pi. 
LXXVIII. fig. 19. 
C. elongata. Sowcrby, V. p. G7, pi. 447, fig. 1. 
Elongated, its width nearly thrice its length, sub-cylindrical; 
anterior side pointed ; posterior side very short; beaks small, 
incurved, and remote from the anterior side; whole surface 
covered with very fine longitudinal strice. 
The Coral Rag, Malton and Cove ; the Inferior Oolite, 
Crosshands, Yorkshire ; and the Lias, Yale of Gloucester. 
S. CrcuLL/EA costellata. —The Small-ribbed Cucullaea, 
pi. LXXVIII. fig. 7. 
C. costellata. Sowerby, V. p. G7, pi. 447, fig. 2. 
Gibbose, transversely oblong, breadth being about twice 
its length; the general outline being an oblique parallelogram ; 
anterior lobe wing-shaped and strongly ribbed, with interme¬ 
diate stria) between them, and with a carinated division sepa¬ 
rating it from the disk; posterior side rounded and ribbed ; 
beaks distinct from each other, and sharp-pointed ; whole sur¬ 
face covered with longitudinal striae, distant in some specimens, 
and numerous in others, slightly decussated by lines of growth. 
The Lower Greensand, Scabrook, Kent. 
9. Cucull.ea mincta. — The Minute Cucullaea, pi. 
LXXVII. fig. 37. 
C. minuta . Sowcrby, V. p. 68, pi. 447, fig. 3. 
Convex, ovate, elongated, its width being more than double 
its length, and smallest at the extremities, the ridge which 
divides the anterior lobo forming a projecting angle upon the 
margin ; anterior side rather small, very obliquely truncated; 
beaks nearly close; surface longitudinally striated. 
The Great Oolite, Ancliff, Wiltshire. 
10. Cucull/Ea uadis. —The Rough Cucullaea, pi. LXXVII. 
fig. *22. 
C. radis. Sowerby, V. p. G8, pi. 447, fig- 4. 
Convex, transversely oblong ; beaks incurved, and nearly 
meeting; surface rugged, and longitudinally ribbed ; anterior 
lobe ill-defined ; disk deeply striated. 
The Great Oolite, Ancliff, Wiltshire. 
11. CuculljEA oblong a. —The Oblong Cucullaea, pi. 
LXXVII. fig. 2.5. 
C. oblonga. Sowcrby, III. p. 7, pi. 200, figs. 1, 2 ; Phillips, 
Geo, York, I. pi. 3, fig. 34. 
Gibboso, transversely oblong, its width about twice its 
length ; anterior side wedge-shaped; front inclining slightly 
to the posterior side, which is small; beaks elegantly in¬ 
curved ; hinge area rhomboidal, with from nine to twelve 
parallel lozenges; surface with numerous longitudinal, irre¬ 
gular, elevated stria). 
Coral Rag, Malton, Yorkshire, and Inferior Oolite, Dundry. 
12. Cucullaea cancellata. —The Cancellated Cucullaea, 
pi. LXXVII. fig. 18, and pi. LXXVIII. fig. 1G. 
C. cancellata. Phillips, Geo. York, I. pi. 19, fig. 24, and 
pi. 11, fig. 44. 
Obliquely sub-ovate ; hinge-lino straight and oblique, and 
acute at both extremities; ligamental area narrow ; beaks 
small, approximating ; anterior side gently curving ; posterior 
side depressed, and ncarlyjobliqucly straight; a ridge, emana¬ 
ting from the beak, diverges to the base, which is arcuated; 
surface decussated with transverse and longitudinal striae. 
The Great Oolite, Clough ton, and Inferior Oolite, Blue 
Wick. 
13. Cucull.ea crassatina. —The Thickened Cucullaea, pi. 
LXXVII. fig. 39. 
O. crassatina. Lamarck, An. du Mus. 0, p. 338. C. de¬ 
al* sata. Sowerby, III. pi. 206, figs. 3, 4. 
Gibbose, transversely ovate, about one-fifth wider than long, 
anterior side angular; surface with somewhat flattened longi¬ 
tudinal ridges, and decussated by fine close lines of growth; 
interior margin crenatcd ; teeth of the hinge striated on their 
sides : lines beneath the cartilago few. 
The London Clay, Feversham and Herne Bay. 
14. Ci'CTJLLJSA contract a. —Tho Contracted Cucullaea, 
pi. LXXVII. fig. 21. 
C. contracta . Phillips, Goo. York, I. pi. 3, fig. 30. 
Obliquely sub-quadrangular, inflated; binge area of moderate 
width; beaks large, rather obtuse; base rather straight; 
surface smooth. 
The Coral Rag, Malton, Yorkshire. 
15 . Cucullaea reticulata.— The Reticulated Cucullaea, 
pi. LXXVIII. fig. 13. 
C. reticulata. Phillips, Geo. York, I. pi. 11, fig- 18. 
Transvcrsoly elongated; rather inflated; anterior side 
large and rounded; posterior side narrowed; straight and 
oblique above, and obliquely truncated, with a produced angle 
below ; beaks very large and obtuse ; base slightly hollowed; 
surface with longitudinal radiating striae on tho anterior side 
and middle, crossed by transverse shallow ridges, producing 
a reticulated appearance. 
The Inferior Oolite, Yorkshire. 
16. CuculljEA ovieormis. —The Egg-shaped Cucullaea, 
pi. LXXVIII. fig. 3. 
C. - Sowerby, Sil. Syst. pi. 3, fig- 1. 
Transversely oviform, hinge-line curved; anterior side 
rounded, posterior side narrowed; base and back a little ar¬ 
cuated ; surface smooth. 
Old Red Sandstone, Ludlow. 
17. Cucull.ea pectinata. —The Pectinated Cucullaea, pi. 
LXXVIII. fig. .5. 
C. pectinata. Phillips, Geo. York, I. pi. 3, fig. 32. 
Transversely elongated ; beaks obtuse, placed near the an¬ 
terior side, which is somewhat rounded ; posteror side a little 
produced below; back and base gently curved; surface with 
numerous radiating striae crossed by remote equidistant lines 
of growth. 
Tho Coral Rag, Malton, Yorkshire. 
18. CucuLLyEA triangularis. —The Triangular Cueullma,. 
pi. LXXVIII. fig. G. 
2. T 
