PLATE XXIX. 
1. Belemnites Lanceolatus. {Spear-shaped Belemnite.) Smooth, sub-fusiform, greatly elongated, one-half 
narrow, the other thickened, tapering to a point: each side, with double, obsolete sulcus; base obscurely trian¬ 
gular, convex or conical. 
2. B. Acutus. (Acute Belemnite.) Conical, round, smooth ; sides slightly compressed, without sulcus, end¬ 
ing in acute apex ; base broad ; cavity deep, central. 
3. B. Attenuatus. {Attenuated Belemnite.) Sub-fusiform, quadrangular, tapering towards base; nearly 
cylindrical from above centre to obtuse apex, frequently striated ; each side with obsolete, double, longitudinal 
sulcus in front. 
4. 12. B. Compressus. {Compressed Belemnite.) Thick, straight, compressed; base wide, oval, not ex¬ 
panded, tapering to apex ; apex surrounded by longitudinal, unequally long, deep sulci; sides flattened; cavity 
deep; apex central; septa many. 
5. B. Penicillatus. {Pencil-shaped Belemnite.) Compressed, short; tapering towards superior end, abruptly 
contracted to almost central, longitudinally striated obtuse point; cavity of opposite extremity deepish. 
6. 7. B. Granulatus. {Granulated Belemnite.) Sub-cylindrical; surface with small granulations and im¬ 
pressions of veins; tapering to obtuse, mucronated apex ; sides with double, longitudinal, nearly obsolete sulcus. 
8. B. Allani. {Allan 7 s Belemnite.) Smooth, cylindrical; apex conical, with slender, produced point; alve¬ 
olus conical, acute, with sub-lateral point; longitudinal section shows small tube lrom alveolus to apex of spathose 
part. 
9. B. Listeri. {Lister's Belemnite.) Sub-fusiform, cylindrical; with slight, single, longitudinal sulcus, end¬ 
ing in acute apex; siphunculus central, from alveolus to apex of spathose part. 
10. B. Voluminis. {Scroll Belemnite.) Smooth, fusiform ; thickest in centre, tapering to each end, and 
terminating in blunt points ; section circular. 
11. B. Elongatus. {Elongated Belemnite.) Elongated, slender, cylindrical centrally ; tapering to obtuse, 
round, plain apex ; base broad, surrounded by many annulations ; chambered part equal to two-thirds length of 
shell; basal diameter equal to one-fourth of length. 
13. B. Gracilis. {Slender Belemnite.) Smooth, fusiform, thick at one end, tapering to obtuse point; ex¬ 
tremely slender at other end ; section orbicular. 
14. B. Fusiformis. {Spindle-shaped Belemnite.) Fusiform; compressed in fore part, tapering towards 
apex; receptacle for alveolus situate towards base in conical form, with longitudinal sulcus one inch long. 
15. 16. B. Mucronatus. {Sharp-pointed Belemnite.) Sub-cylindrical; apex ending in obtuse point with cen¬ 
tral mucro ; base expanded ; aperture circular ; sulcus extending along expanded portion; flattened space nearly 
whole length of shell on each side of back, whence numerous vein-like channels. 
17. B. Tubularia. {Tubular Belemnite.) Tubular, elongated, smooth, tapering towards point, where it again 
bulges out into compressed, three-furrowed point; thicker towards base. 
18,19. B. Abbreviatus. {Shortened Belemnite.) Short, sub-cylindrical; fore part tapering to recurved, 
eccentric apex ; base expanded ; sides flattened; cavity equal to half length of shell. 
20, 21. B. Minimus. {Least Belemnite.) Fusiform, quadrangular, spreading towards apex, cylindrical 
towards base ; apex obsoletely papillose; each side, with double, obscure sulcus. 
22. B. Pistilliformis. (Pestle-shaped Belemnite .) Fusiform, thickened toward apex ; suddenly and greatly 
attenuated and elongated towards base ; surface with slight impressions of veins. 
23,24. Beloptera Anomala. {Anomalous Belloptera.) Oblong, smooth, thin, curved; sides scarcely ex¬ 
panded ; apex very obtuse, with small, circular perforation in front qr on concave side; cone increasing in thick¬ 
ness at sides and back to its end ; shell thin at base of cone; section trigonal. 
25,26. Amplexus Coralloides. {Coral Amplexus.) Tubular; irregularly bent; surface undulous, longitudi¬ 
nally striate; margins of septa reflexed, forming elongated cells, terminating in septa; lines of growth close, 
well-defined ; septa equal to fourth or fifth part of diameter of tube, remote, with margins reflexed to adjoining 
septum. Diameter £ in. to 1£ in. 
27. Conularia Quadrisulcata. {Four-furrowed Conularia.) Straight; four-sided ; each angle, with bent, 
oblique, transverse sulci; longitudinally striated ; labia of two longer sides inflected over base; septa with deli¬ 
cate, transverse, irregular stria3. 
28. C. Teres. {Taper Conularia.) Conical, tapering, round, sub-cylindrical, irregularly arcuated, with 
transverse, irregular strife ; smooth space near apex ending in blunted cone. 
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