112 
MOLLUSCA. 
Spirifer. 
45 . Spirifer tjeniata. —The Filleted Spirifer, pi. LI. 
fig. 19. 
Spirifera tceniata. Phillips, II. p. 219, pi. 10, fig. 17. Spi - 
rifera lineata , Phillips, p. 219* 
Nearly orbicular, smooth • cardinal area narrow, transversely 
filleted 3 mesial fold obsolete. 
Mountain Limestone, Bolland and Queen’s County. 
46. Spirifer oblatus -The liaised Spirifer, pi. LI. 
fig. 20 . 
Spirifer oblatus . Sowerby, III. p. 123, pi. 268. 
Gibbose, transversely obovate, its width somewhat more than 
its length, very smooth • mesial rib rather depressed 3 the cor¬ 
responding furrow in the other valve flattened in the middle 3 
beaks approximate ; foramen of the cardinal area triangular. 
Mountain Limestone, Westmoreland, Derbyshire, and Flint¬ 
shire. 
47. Spirifer elliptica. —The Elliptical Spirifer, pi. LI. 
fig. 21 . 
Spirifera elliptica. Phillips, II. p. 219, pi. 10, fig. 16. 
Transversely oval 3 beaks not much produced 3 mesial fold 
obtuse, and broad 3 surface with wide, somewhat irregular rays, 
and concentrically striated 3 cardinal area fiat, smooth. 
Mountain Limestone, Bolland 3 Queen’s County, Ireland. 
48. Spirifer obtusa. — The Obtuse Spirifer, pi. LI. 
fig. 22. . 
Spirifer obtusus. Sowerby, III. p. 124, pi. 269, two lower 
figures. Fleming, p. 37o. 
Gibbous, transversely ova<C 3 with nearly obsolete, longitudi¬ 
nal strife 3 central elevation obtuse, and rounded 3 beaks blunt, 
and distant. Width nearly double its length. 
Differs from glabra, iu the central elevation not being flattened 
along the middle, with a deeper sinus at its edge; the umbo in the lower 
valve also considerably more produced. 
Mountain Limestone at Scaliber, near Settle, Yorkshire. 
49. Spirifer symmetrica. —The Symmetrical Spirifer, 
pi. LI. fig. 23. 
Spirifera symmetrica. Phillips, II. p. 219, pi. 10, fig. 13. 
Subquadrate, very gibbous, smooth 3 with a wide mesial fold, 
which is sometimes divided in the middle ; beaks pointed, in¬ 
curved, and remote j the umbo of the lower valve greatly larger 
than the other. 
Mountain Limestone, Bolland. 
50. Spirifer lata. —The Broad Spirifer, pi. LI. fig. 24. 
Spirifera glabra. Phillips, II. p. 219, pi. 10, fig. 12. 
Gibbous, considerably elongated transversely, its breadth 
being more than double its length, smooth j mesial fold ele¬ 
vated, round, and subdepressed 3 with obscure, lateral radia¬ 
tion 3 umbones blunt, and short. 
Mountain Limestone, Arran and Derbyshire. 
51. Spirifer glabra. —The Smooth Spirifer, pi. LI. fig. 
27, 28, 29. 
Spirifer glabra. Sowerby, III. p. 123, pi. 269, two upper 
figures. Fleming, p. 375. Phillips, II. p. 219, pi. 10 , fig. 10, 
11 . A nomites glaber, Martin, Pet. Derb. pi. 28, fig. 9, 10. 
Gibbous, rounded, smooth 3 umbones subacute, approxima¬ 
ting 3 mesial fold rounded, depressed in the middle 3 margins 
sharp j indistinct lines of growth. 
This species is subject to variety in its form. 
Mountain Limestone, Bolland, Derbyshire, Arran, Ireland, 
and Isle of Man. 
52. Spirifer imbricata. —The Imbricated Spirifer, pi. 
LI. fig. 25. 
Spirifera imbricata. Phillips, II. p. 220, pi. 10, fig. 20. 
A short, transverse ellipsis 3 mesial fold obsolete 3 umbones 
approximate 3 surface with strong, radiating stria), crossed by 
concentric, imbricated laminae, which interrupt the striae. 
Mountain Limestone, Derbyshire, Northumberland, and 
Bolland. 
53. Spirifer decora. —The Adorned Spirifer, pi. LI. 
fig. 26. 
Spirifera decora. Phillips, II. p. 219, pi. 10, fig. 9* 
Almost orbicular, convex 5 umbones prominent 3 beaks rather 
acute 3 cardinal area triangular, wide 3 mesial fold rather indis¬ 
tinct, and slightly divided below 5 surface with obscure, nearly 
obsolete radiations. 
Mountain Limestone, Bolland. 
54. Spirifer linguifera —The Tongue-shaped Spirifer, 
pi. LI. fig. 14. 
Spirifera linguifera. Phillips, IT. p. 219, pi. 10, fig. 4. 
Slightly oblong longitudinally, convex, destitute of angles . 
mesial fold rounded, prominent 3 umbones produced, approxi¬ 
mating, and with rather obtuse beaks j lateral radiations ob¬ 
scure 3 lines of growth indistinct. 
Mountain Limestone, Bolland. 
Section V.— Terebratuliformes. —Destitute of a 
cardinal area. 
55. Spirifer squamosa. —The Scaly Spirifer, pi. LII. 
fig. 1 . 
Spirifera squamosa. Phillips, II. p. 220, pi. 10, fig. 21 . 
Depressed, transversely oblong-ovate 3 mesial fold small 3 
smooth, with transverse imbrications 3 umbones approximating. 
Mountain Limestone, Kendal and Florence Court. 
56. Spirifer fimbriata —The Fringed Spirifer. 
Spirifera fimbriata. Phillips, II. p. 220. 
“ Orbicular, depressed; beak of the lower valve prominent, 
but small 3 surface strongly radiated, and concentrically imbri¬ 
cated.” 
Mountain Limestone, Florence Court. 
57. Spirifer planosulcata. —The Flat-furrowed Spirifer, 
pi. LII. fig. 4. 
Spirifera planosulcata. Phillips, II. p. 220, pi. 10, fig. 15. 
Somewhat pentacdral, depressed 3 the central furrows in each 
valve flattened 3 umbones approximate. 
Mountain Limestone, Bolland and Queen’s County. 
58. Spirifer expansa —The Expanded Spirifer, pi. LII. 
fig. 5. 
Spirifera expansa. Phillips, II. p. 220, pi. 10, fig. 18. 
Transversely subovate, compressed 3 destitute of a mesial 
fold 3 with fine, longitudinal radiations, crossed by concentric 
stria). 
Mountain Limestone, Bolland. 
59. Spirifer globularis. — The Globular Spirifer, pi. 
LII. fig. 12 . 
Spirifera globularis. Phillips, II. p. 220, pi. 10, fig. 22. 
Subglobose, smooth 3 umbones obtuse, approximating 3 mesial 
fold broad. 
Mountain Limestone, Bolland. 
