Belopteba. 



MOLLUSCA. 



43 



16. B. coMPREssus. — The Compressed Beleranite, pi. 

 XXIX. fig. 4 and 12. 



Belemnites compressus. De Blainvillc, Mem. sur 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 cxpandcil, and gradually tapering to the apex, which is 

 surrounded by longitudinal, unecpiallj' 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. TUBui.AHiA The Tubular Belemnite, pi. XXIX. 



fig. 17. 



Belemnites tuhularia. Phillips, Geo. of Yorkshire, I. p. 16.3, 

 pi. 12, fig. 20. 



Shell tul)ular, 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 liigher 

 part of the tube. 



Found in the Upper Shale of tlie Lias at Saltwick. 



Genus XII.— BELOPTERA.— Z)es^«!/es. 



Sliell internal, oblong, expanding, concave, thin ; witli 

 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. 



remote, with their margins reflexed to the adjoining septum. 

 Diameter varying from half an inch to an inch and a lialf. 



Found in the Transition Limestone, in the Black Rock at 

 Limerick. 



Genus XIV.— CONULARIA.— M?7/er. 



tihell conical, hollow, mnltilocular, divided by trans- 

 verse, imperforate septa ; aperture half closed by an 

 inflection of the lip. 



1. C. QUADHisuLCATA. — The Four-Furrowcd Conularia, 

 pi. XXIX. fig. 27. 



Conularia quadrif.ttlcala. A curious fossil, Ure's History 

 of Rutherglen and Kilbride, p. 330, pi. 20, fig. 7. Sowerby, 

 Min. Conch. III. p. 107, 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 which 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 striee ; having a smooth space near the apex, which 

 terminates in a blunted cone. 



Found in the Shale, at Tronlie Bank, near Glasgow. 



Order HI.— TRACHELIPODA. 



Genls Xlll.— AMPLEXUS.— So?i-c%. 



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. 



Atnplcxus 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, which 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, 



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. ZOOPHAGOUS TRACHELIPODA. 



Family I.— INVOLUTE. 



Sliell 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 e.\ternal one nearly envelopes the others. 



