52 



MOLLUSCA. 



Caliendrum. 



1. p. TETRAGONA. — The Tetragonal Purpura, pi. XXXII. 



%. 17, 18. 



Purpura tetragonum. Fleming, Brit. An. p. 341. Bucci- 

 num tetragonum, Sowerby, Min. Conch. V. p. 13, pi. 414, 

 fig. 1. 



Shell thick, ovate ; body large ; spire short, consisting of 

 four narrow volutions, a little flattened above ; whole shell 

 provided with strong, elevated, longitudinal ribs, crossed by 

 four large, and several smaller, intermediate, transverse fur- 

 rows between them, which divide the shell into squarish cells ; 

 aperture oblong-ovate, rounded above, and slightly contracted 

 below ; columella smooth, broadly and thickly reflected, and 

 continuous above ; outer lip somewhat undulous on the mar- 

 gin, provided with strong blunt tubercular teeth within ; 

 beak sliort, and but slightly curved. 



Discovered by Mrs Cobbold, in the Crag, near Ipswich. 



2. P. CRISPATA. — The Curled Purpura, pi. XXXII. 

 fig. 33, 34. 



Purpura imbricata. Lamarck, An. San. Vert. VII. p. 557. 

 P. lapillus, Lamarck, Env. de Paris, p. 36. P. crispatum, 

 Fleming, Brit. An. p, 341. Buccinum crispatum, Sowerby, 

 Min. Conch. V. p. 12, pi. 413, fig. 3. 



Shell oblong-ovate ; body large ; spire short, consisting of 

 five or six well-defined, inflated volutions, terminating in a 

 somewhat acute apex ; whole surface invested with nume- 

 rous, close, spiral ribs, which are covered by rough, imbri- 

 cated scales, with several projecting, longitudinal lines of 

 growth ; aperture semiovate, rounded above, and slightly 

 contracted below ; inner lip smooth, and reflected on the 

 columella, continuous above, and not extending to the 

 base of the short beak below ; outer lip slightly reflected, 

 thin, and undulous on the margin, and subcrenated inter- 

 nally. 



Found plentifully in the Suffolk and Norfolk Crag. 



3. P. CARiNATA. The Keeled Purpura, pi. XXXII. 

 fig. 41, 42. 



Purpura crispatum. Fleming, Brit. An. p. 341. Bucci- 

 num crispatum, Sowerby, Min. Conch. V. p. 12, pi. 413, 

 fig. 2. 



Shell oblong-ovate, subturreted ; body large ; spire short, 

 consisting of four or five volutions, which, with the bod3' and 

 surface, are obliquely flattened above ; whole covered with 

 strong, remote, transverse, rounded ribs, which are invested 

 with rough, imbricated scales, the superior rib on the body, 

 and central one on the spire, being more elevated than the 

 rest ; the intervening furrows with longitudinal curved stria ; 

 aperture ovate, rounded above ; pillar lip smooth, continuous 

 above, and extending to the base of the short canal ; outer 

 lip thin, undulous on the margin, and subcrenated inter- 

 nally. 



Found in the Norfolk and Suffolk Crag. 



4. P. INXRASSATA. — The Thickened Buccinum, pi. XXXII. 

 fig. 39, 40. 



Purpura incrassatum. Fleming, Brit. An. p. 341. Bucci- 

 num incTussatum, Sowerby, Min. Conch. V. p. 13, pi. 414 

 fig. 2. 



Shell very thick, ovate ; bodj' large ; spire very short, 

 being only a third the length of the body in front, consisting 

 of four volutions, terminating in an obtuse apex ; all the 

 volutions obliquely flattened above ; body provided with five 

 or six strong, rounded, transverse ribs, the superior one the 

 largest, which continues spirally along the centre of the volu- 



tions ; the whole surface covered with irregular, broken, 

 waved, longitudinal striae, or lines of growth ; aperture rather 

 small, subovate, rounded above, and slightly contracted 

 loelow ; pillar lip broadly reflected on the columella, and con- 

 tinuous above ; outer lip a little thickened and undulous on 

 tiie margin, with obscure furrows, and blunted tubercles 

 between them internally. 



Found plentifully in the Suffolk Crag. 



5. P. DESERTA. — The Forsaken Purpura, pi. XXXII. 

 fig. 3, 4. 



Purpura desertum. Fleming, Brit. An. p. 342. Buccinum 

 deserlum, Brander, Fossil, Hant. fig. 15. Sowerby, Min. 

 Conch. V. p. 14, pi. 415, fig. 1, two smaller figures. 



Shell ovate ; spire short, conical, consisting of five some- 

 what depressed volutions, abruptly tapering to a point, and 

 separated by a broad, rounded groove, which winds spirally 

 close to the suture ; the whole shell provided with numerous, 

 longitudinal, irregular, rather flattened ribs, with sharp points 

 upon their upper extremities, which are crossed by remote, 

 spiral striiE ; aperture ovate, widened above and narrow 

 below, with distant grooves within ; columella smooth, with 

 an obscure fold at its base ; canal very short. 



Found at Barton ClifiP, in the Blue Clay. 



6. P. Dentu. Dent's Purpura, pi. XXXII. fig. 5, 6. 

 Buccinum desertum. Sowerby, Min. Conch. V. p. 14, 



pi. 415, fig. 1, larger figure. 



Shell oblong-ovate ; spire conical, consisting of five some- 

 what inflated volutions, tapering rather abruptly to an obtuse 

 apex ; the volutions separated by a double, wide, spiral fur- 

 row, situate immediately below the suture ; the whole shell 

 furnished with strong, longitudinal, unequal ribs ; aperture 

 ovate, widened above, and a little contracted below, and 

 grooved internally ; columella smooth ; aperture short. 



This species differs from the preceding in having a double 

 spiral groove separating the volutions, and in the spire being 

 somewhat more produced. 



Found in the Blue Clay at Barton Cliff. 



Genus XIV.— CALIENDRUM.— .Broww. 



Shell oblong-ovate, acute ; volutions deeply divided ; 

 aperture irregularly ovate ; columella greatly reflected 

 and undulous, destitute of a canal at tbe base ; outer lip 

 very broad, somewhat reflected and smooth on the 



1. C. viTTATATUM. — The Girdled Caliendrum, pi. XXXII. 

 fig. 20. 



Buccinum vittatum. Phillips, Geo. of York. II. p. 230, 

 pi. 16, fig. 14. 



Shell elongated, smooth ; body large, considerably inflated ; 

 spire consisting of six very ventricose, deeply-divided volu- 

 tions, terminating in a blunted apex ; a broad flat mesial band 

 commences on the back of the outer lip, and encompasses 

 the centre of the bod)' and superior volutions, and terminates 

 in the apex ; aperture irregularly oval ; columella undulous, 

 broadly reflected on the body, continuous both above and 

 below, and destitute of a canal ; outer lip broad, thick, 

 reflected, and thin and even on the margin. 



Found in the Mountain Limestone at BoUand, Queen's 

 County, Ireland. _ 



