Lituites. 
CEPHALOPODA. 
249 
5. Belemnites longissimus. —The Lengthened Belemnites, 
pi. XXIX.* figs. 13, 14. 
B. longissimus . Miller, Geo. Tr. 2nd. Ser. II. p. 00, pi. 8, 
figs. 1, 2. 
Guard very strong, much lengthened, smooth, and terminat¬ 
ing in a conic poiut. 
The Lias, Lyme Regis, Weston and Holland. 
0. Belemnites jaculum. —The Dart Belemnites, pi. XXIX.* 
fig. 1 1. 
B. jaculum. Phillips, Geo. York. I. pi. 3, fig. 1. 
Spindle shaped, much accumunated behind, and terminating 
in a rounded sub-conic point. 
The Specton Clay, Specton, Yorkshire. 
7. Belemnites tripartiyus. — The Three-parted Belem¬ 
nites, pi. XXIX.* figs. 15, 10, 17, 18. 
B . tripartite . Miller, Geo. Tr. 2nd Ser. II. p. 00, pi. 8, 
figs. 10, 11, 12, 13. 
Guard formed of three longitudinal portions, exhibiting, 
near the apex, three distinct longitudinal ridges. 
The Lias, Lyme Regis, Dorsetshire. 
8. Belemnites aduncatus. —The Hooked Belemnites. pi. 
XXIX.* figs. 19, 20, 21. 
B. aduncatus. Miller, Geo. Tr. 2nd Ser. II. p. 59, pi. 8, 
figs. 0, 7, 8. 
Guard cylindrical, very smooth, sometimes finely striated, 
terminating in a hooked apex, which is furnished with four or 
five ridges, the intervening furrows are sometimes slightly 
tuberculated. 
Tins species lias a considerable resemblance to B. abbre- 
viatus, but is considerably more slender. 
The Lias, Lyme Regis and Weston. 
9. Belemnites electrinus. —The Amber Belemnites, pi. 
XXIX.* figs. 23, 24. 
Guard cylindrical, the lower extremity conical, with a mam- 
millated point; amber coloured. 
When specimens are perfect, where the guard adheres to 
the chambered cone, there is a longitudinal groove in the 
centre. On the surface there arc generally traces of blood¬ 
vessels. An outline of these blood-vessels is represented in 
fig. 12. 
In the Lias, Lyme Regis, Dorsetshire. 
10. Belemnites G ibsoni. —Gibsons Belemnites, pi. XXIX.* 
fig. 28. 
B. Gibsoni. Brown, Tr. Man. Geo. Soc. I. p. 220, pi. 7, f. 41. 
Sholl tapering gradually, smooth, and shining; aperture 
nearly circular. Length five-eighths of an inch, diameter at 
aperture an eighth of an inch. 
Found at Crimsworth Dean, in the Limestone Shale. 
1 . Orthocera obtusa. —The Obtuse Orthocera, pi. XXIX.* 
tig. 30. 
O. obtusa. Brown, Tr. Man. Geo. Soc. I. p. 219, pi. 7, f. 36. 
Shell erect, taper, slightly compressed; surface smooth, 
covered with undulating, transverse stria?; the point for a 
quarter of an inch destitute of striae, next which the stria? are 
very fine and close-set, gradually widening as they ascend, and 
becoming more undulous. Diameter near the base three- 
quarters of an inch, greatest known diameter an inch and an 
eighth. 
In the Carboniferous Shale, High-Green Wood, near Heb- 
den Bridge, Vale of Todmorden. 
2. Orthocera mjcroscopica. —The Microscopic Orthocera, 
pi. XXIX.* figs. 26, 27. 
O. rnicroscopica. Brown, Tr. Man. Geo. Soc. 1. p. 219, pi. 
7, figs. 37, 38. 
Shell taper, smooth ; with the septa remote ; aperture semi¬ 
oval. Length a line, thickness not the fourth of a line. 
In the Carboniferous Shale, High-Green Wood, Vale of 
Todmorden. 
3. Orthocera ascicularis. —The Ascicular Orthocera, pi. 
XXIX.* fig. 29. 
O. ascicularis. Brown, Tr. Man. Geo. Soc. I. p. 219, pi. 7, 
fig. 39. 
Shell very long, and tapering rather abruptly ; smooth; 
septa numerous, transversely parallel, regular, and increasing 
with age; aperture circular; siphuncle near to one side. 
Length almost an inch and an eighth, diameter at aperture not 
an eighth of an inch, and a third of an eighth at the base. 
Found in the soft Shale at Todmorden. 
4. Orthocera Brownii. —Brown’s Orthocera, pi. XXIX,* 
fig. 31. 
O. Brownii. Tr. Man. Geo. Soc. I. p. 219, pi. 7, fig. 40. 
Shell subulate, arcuated; with seven longitudinal, elevated 
ribs; giving the shell a septangular form; general surface 
smooth; septa numerous, undulating, more remote as they 
ascend. Length one inch and a quarter, diameter one sixth. 
Found in the Carboniferous Shale, Todmorden. 
5. Orthocera elongatus.— The Elongated Orthoceras, 
pi. XXIX.* fig. 25. 
O. elongatus. Miller, Geo. Tr. 2nd Ser. II. p. CO, pi. 8, 
fig. 19. 
Much elongated and accumunated, the chambered cone and 
guard both terminating in a sharp point. 
The guard is very thin, and in external appearance much 
resembling a Belemnite, the surface being quite smooth, and 
polished. 
The Inferior Oolite, Dundry, Somersetshire. 
1. Lituites gigaxteus. —The Gigantic Lituites, pi. III.* 
figs. 1, 2, 3. 
L. Giganteus. Sowerby, Sil. Syst. p. 022, pi. 11, fig. 4. 
