Beloptera. 
MOLLUSCA. 
43 
1G. B. compressus. — The Compressed Belemnite, pi. 
XXIX. fig. 4 and 12. 
Belemnites compressus. Dc Blainvillc, Mem. stir les 
Belem, p. 84, pi. 2, fig. 9. Sowerby, Min. Conch. VI. p. 182, 
pi. 590, fig. 4. 
Shell thick, straight, slightly compressed ; base wide, oval, 
not expanded, and gradually tapering to the apex, which is 
surrounded by longitudinal, unequally long, deep furrows, two 
of which extend farther down the flattened sides than the 
others ; cavity deep, with a central apex ; septa very numerous. 
Found in the Inferior Oolite, near Scarborough. 
17. B. tubula hi a. — The Tubular Belemnite, pi. XXIX. 
fig. 17. 
Belcmnites tubularia. Phillips, Geo. of Yorkshire, I. p. 163, 
pi. 12, fig. 20. 
Shell tubular, much elongated, smooth, tapering very 
gently towards the point, where it again bulges out into a 
compressed three furrowed point; thickening gradually to¬ 
wards the base, which is double the diameter of the higher 
part of the tube. 
Found in the Upper Shale of the Lias at Saltwick. 
Genus XII.—BELOPTERA.— Deshaijes. 
Shell internal, oblong, expanding, concave, thin ; with 
a chambered cone attached to its inner surface and 
placed longitudinally; from the apex to the cone the 
shell is considerably thickened. 
1. B. anomala. — The Anomalous Beloptera, pi. XXIX. 
fig. 23, 24. 
Beloptera anomala. Sowerby, Min. Conch, p. 184, pi. 591, 
fig. 2. 
Shell oblong, smooth, very thin, somewhat curved ; sides 
but little expanded ; apex very obtuse, with a small circular 
perforation in front, or on the concave side ; cone increasing 
in thickness, at the sides and back, to its termination ; at the 
base of the cone the shell is thin ; the section is trigonal. 
Found at Highgate Hill in the London Clay. 
Genus XIII. —AM PLEX US. — Sowerby. 
Shell nearly cylindrical, multilocular, with numerous 
transverse septa embracing each other with their reflexed 
margins. 
1. A. coralloi'des.— The Coral-Amplexus, pi. XXIX. 
fig. 25, 26. 
Amplexus coralloides. Sowerby, Min. Conch. I. p. 165, 
pi. 72. Fleming, Brit. An. p. 251. 
Shell tubular, unequal in diameter, and irregularly bent; 
surface undulous, and longitudinally striated ; margins of the 
septa deeply reflexed, the folds corresponding in width to the 
longitudinal striae, and owing to their depth forming elonga¬ 
ted cells, whicli terminate in the septa; lines of growth 
close, well defined, and somewhat unequal in depth ; septa 
equal to a fourth or fifth part of the diameter of the tube, 
remote, with their margins reflexed to the adjoining septum. 
Diameter varying from half an inch to an inch and a half. 
Found in the Transition Limestone, in the Black Rock at 
Limerick. 
Genus XIV.— CONULARIA.— Miller. 
Shell conical, hollow, multilocular, divided by trans¬ 
verse, imperforate septa; aperture half closed by an 
inflection of the lip. 
1. C. quadrisulcata. — The Four-Furrowed Conularia, 
pi. XXIX. fig. 27. 
Conularia quadrisulcata. A curious fossil, Urc\s History 
of Rutherglen and Kilbride, p. 330, pi. 20, fig. 7. Sowerby, 
Min. Conch. III. p. 107j pi. 260, fig. 3, 4, 5, 6. Fleming, 
Brit. An. p. 240. 
Shell straight, four sided, two of the angles opposite each 
other being more elongated than the rest, and all of them 
equally excavated ; each of whicli is covered with bent, 
oblique, transverse sulci, which run close together towards 
the base ; the intervening spaces forming narrow ridges ; also 
longitudinally striated, which are most conspicuous within 
the hollows ; labia of the two longer sides, inflected over 
somewhat more than half of the base, and meet opposite the 
shorter edge, and are sulcated, as in the other parts of the 
shell; septa with delicate transverse, irregular stria*. 
Found in the Carboniferous Limestone, at Keswick, 
Westmoreland, and in Shale at Tronlie Bank, near Glas¬ 
gow. 
2. C. teres. —The Taper Conularia, pi. XXIX. fig. 28. 
Conularia teres . Sowerby, Min. Conch. III. p. 108, 
pi. 260, fig. 1, 2. Fleming, Brit. An. p. 240. 
Shell conical, gradually tapering, round, subcylindrical, 
and slightly and irregularly arcuated, with transverse, 
irregular stria; having a smooth space near tiie apex, which 
terminates in a blunted cone. 
Found in the Shale, at Tronlie Bank, near Glasgow. 
Order III.—TRACHELIPODA. 
Body of the animal spirally convolute in its posterior 
part, separated from the foot, and always enveloped in 
a shell; the foot free, flattened, attached to the inferior 
base of the neck, or the anterior part of the body, 
forming a member of locomotion. Shell spiral and 
enveloping. 
SECTION I.-ZOOPIIAGOUS TRACHELIPODA. 
Family I.—INVOLUTE. 
Shell destitute of a canal, but having the base of its 
aperture notched or effuse, and its spiral convolutions 
broad, compressed, and rolled up in such a manner that 
the external one nearly envelopes the others. 
