42 
MOLLUSCA. 
Belemnites. 
tapering towards the apex, and gradually towards the other 
extremity; a receptacle for the alveolus is situate towards the 
base in a conical form, with a longitudinal sulcus upwards of 
an inch in length. 
Found in the Lower Oolite, Stonesficld, Oxfordshire; in 
the Speeton Clay at Speeton ; and also in the Blue Marie of 
Bedfordshire and Kent 
8. B. Listeiu. —Lister’s Belemnite, pi. XXIX. fig. 9* 
Belemnites Listeri . Mantell, Geo. of Sussex, p. 88, pi. 19, 
fig. 17, 18, and 23. B. minima . Lister, Anim. Ang. p. 228, 
fig. 32. Fleming, Brit. An. p. 240. Phillips, Geo. of York. 
I. p. 120, pi. 1, fig. 18. 
Subfusiform, cylindrical, with a single, slight, longitudinal 
sulcus, and terminating in an acute apex ; siphuncle central, 
extending through the alveolus to the apex of the spathose 
part. 
Dr Mantell says, “ The form of this beautiful little Belem¬ 
nite varies considerably,—some of the specimens are fusiform, 
others gently taper towards the apex; some are perfectly 
cylindrical, and others contract suddenly. The longest 
example in my collection, is 0.2 in diameter, and 1.3 inch in 
length. These fossils occur in profusion in every locality of 
the Blue Marie of Sussex, and also in Surrey, Kent, and 
Cambridgeshire.” They also occur in the Red Chalk of 
Sussex, according to Professor Phillips. 
9. B. voi.uminus. — The Scroll Belemnite, pi. XXIX. 
fig. 10. 
Belenmites mucronatus. Sowerby, Min. Conch. VI. p. 207, 
pi. 600, fig. 7, young shell. 
Shell smooth, fusiform, thickest in the centre, gradually 
tapering to each extremity, and terminating in blunt points ; 
section circular. 
Found in the Chalk at Norwich. 
We cannot agree with Sowerby in considering this the 
young of B. mucronatus. 
10. B. pi st i ll iformis. — The Pestle-shaped Belemnite, 
pi. XXIX. fig. 22. 
Belemnites pi still if or mis. Do Blainville, Mem. sur les 
Belem, p. 89, pi. 5, fig. 14 to 17- Sowerby, Min. Conch. 
VI. p. 177, pk 589, fig- 3. 
Shell fusiform, much thickened towards the apex, suddenly 
and greatly attenuated and elongated towards the base ; sur¬ 
face bearing slight impressions of veins. 
Found in the Lias at Shorne Cliff, to the east of Char- 
mouth. 
11. B. minimus. — The Least Belemnite, pi. XXIX. fig. 
20 , 21 . 
Beleinnites minimus. Miller, Geo. Trans. 2d Series, II. 
p. 62, pi. 9> fig- 6. De Blainville, Mem. sur les Belem, p. 
75, pi. 4, fig. 1, and p. 119, pi. 5, fig. 5. Sowerby, Min. 
Conch. VI. p. 175, ph 589, fig. 1. 
Shell fusiform, slightly quadrangular, spreading towards 
the apex, and cylindrical as it approaches the base, but not 
expanded ; apex obsoletely papillose ; # each side with an 
obscure double furrow. 
Found in Blue Chalk Marie of Bedfordshire, Folkstone, 
Maulden, and Cophill. 
12. B. mucronatus. —The Sharp-Pointed Belemnite, pi. 
XXIX. fig. 15, 16. 
Belemnites mucronatus. Brongniart and Cuvier, Geo. des 
Env. de Paris, p. 382, pi. 3, fig. 1. De Blainville, Mem. 
sur les Belem, p. 64, pi. 1, fig. 12. Sowerby, Min. Conch. 
VI. p. 205, pi. 600, fig. 1, 2, 4, 6, 7. B. electrinus , Miller, 
Geo. Trans. 2d Series, II. p. 61, pi. 8, fig. 18 to 21, and 
pi. 9, fig- 1 and 3. Belemnite, Faujas, Maestricht, p. 178, 
pi. 32, fig. 3. Actbiocamax vents. Miller, Geo. Trans. 2d Ser. 
II. p. 64, pi. 9, fig- 17, 18. 
Shell subcylindrical ; apex terminating abruptly in an 
obtuse point, with a central mucro ; base expanded, near to 
which is a slight contraction ; aperture almost circular ; a sul¬ 
cus extends along the expanded portion, which communicates 
with the internal cavity ; a flattened space stretches nearly 
the whole length of the shell on each side of the back, from 
whence numerous vein-like channels emanate, and diverging 
round the sides, meet upon the front of the shell, or enter the 
sulcus. 
Fig. 16 represents a section of the shell. 
Found in the Upper Chalk of Norwich, and is to be met 
with in the same stratum of almost every country. 
13. B. elongatus. —The Elongated Belemnite, pi. XXIX. 
fig. 11. 
Belemnites elongatus. Miller, Geo. Trans. 2d Series, II 
p. 60, pi. 7, fig- 6, 7, 8. De Blainville, Mem. sur les Belcm- 
nites, p. 75. Sowerby, Min. Conch. VI. p. 178, pi. 590, 
fig. 1. A Belemnite, Flott, Phil. Trans. LIV. p. 38, with 
a figure. 
Shell elongated, slender, and cylindrical in the centre, 
gradually tapering to an obtuse apex, which is round and 
plain; gradually expanding in the other direction to a broad 
base, and encompassed by numerous obtuse annulations; 
chambered portion equal to two-thirds the length of the 
shell; diameter of the base equal to about a fourth of its 
length. 
Found in the Lias Clay at Lyme Regis, Dorsetshire; 
Daventry, Northamptonshire; Charmouth, and vicinity of* 
Bath. 
14. B. abbreviatus. — The Shortened Belemnite, pi. 
XXIX. fig. 18, 19- 
Belemnites abbreviatus. Miller, Geo. Trans. 2d Series, 
p. 59, pi- 7) fig- 9 and 10. De Blainville, Mem. sur les 
Belem, p. 91- Sowerby, Min. Conch. VI. p. 179, pi- 590, 
fig. 2, 3, and 9- 
Shell short, subcylindrical; fore part abruptly tapering to 
a slightly recurved eccentric apex, being considerably off the 
centre; base expanded; sides somewhat flattened ; cavity 
equal to half the length of the shell. 
The considerable thickness in proportion to the length, the 
contraction and curvature of the point, are distinguishing 
characteristics of this species. 
Found in the Lias and Inferior Oolite at Weymouth. 
SECTION II.-SHELLS STRAIGHT AND CONICAL. 
15. B. acutus. —The Acute Belemnite, pi. XXIX. fig. 2. 
Belemnites acutus. Miller, Geo. Trans. 2d Series, II. 
p. 60, pi. VIII. fig. 9- Sowerby, Min. Conch. VI, p. 180, 
fig. 7, 8, and 10. 
Shell conical, round, smooth, sides very slightly com¬ 
pressed, and destitute of a furrow, terminating in an acute 
apex ; base broad ; cavity deep and central. 
Found at Shorne Cliff, Charmouth ; and at Weston, near 
Bath. 
