Pyrula. 
MOLLUSCA. 
59 
Genus XXII _ PYRULA. — Lamarck. 
Shell thin, oblong, ventricose above, somewhat at¬ 
tenuated below, and usually very regular in form; spire 
short and rounded; aperture elongated, lengthened into a 
short, broad canal at the base, narrower in its superior 
extremity and broader in the middle, in consequence of 
the columella sinus; outer lip sharp on the margin, and 
minutely crenulated; inner lip very thin, and spreading- 
over the front, sometimes nearly imperceptible; outside 
generally cancellated, but destitute of varices or umbili¬ 
cus; and covered with an excessively thin epidermis. 
1. P. nexilis. —The Wreathed Pyrula, pi. XXXV. fig. 
6, 7. 
Pyrula nexilis . Lamarck, Env. de Paris, fig. 67. Sowerby, 
Min. Conch. IV. p. 33, pi. 331. Murex nexilis, Brander, 55. 
Pyriform, or obovate; spire very short, consisting of three 
rounded volutions, and terminating in a rather obtuse apex; 
whole surface covered with wide-set, elevated, longitudinal, and 
spiral stria?, the transverse stria?, the most acute and uniform, 
producing a beautiful cancellated appearance; aperture long, 
narrow, acute above, and terminating below in a contracted 
canal. 
Found in the London Clay at Barton Cliff. 
2. P. Greenwoodii. — Greenwood’s Pyrula, pi. XXXV. 
fig. 4, 5. 
Pyrula Greenwoodii. Sowerby, Min. Conch. V. p. 157, pi. 
498. 
Pyriform, thin; spire very short, consisting of four rounded 
volutions, and terminating in a somewhat obtuse apex; surface 
covered with rather irregular, elevated, longitudinal, and trans¬ 
verse stria'; aperture much elongated and narrow, pointed above, 
and terminating below in a narrow canal; beak considerably 
pointed. 
Found in Hampshire, by Mrs. Greenwood. 
3. M. tuberosus. —The Tuberose Murex, pi. XXXIV. 
fig. 19. 
Murex tuberosus. Sowerby, Min. Conch. \ I. p. 152, pi. 
578, fig. 4. 
Oblong-ovate; body and spire of nearly equal length; spire 
small, consisting of three or four squarish volutions, terminating 
in an obtuse apex, with a single row of blunted tubercles upon 
the upper part of each volution; whole shell beset with irregu¬ 
lar spiral stria?; aperture subovate; beak very short, and slightly 
produced. 
Found in the Pisolite at Malton. 
This shell differs considerably from the species of the same name 
figured and described by Sowerby, vol. III. pi. ‘229, fig. 1. 
4. P. bullatus. —The Bossed Pyrula, pi. XXXIV. fig. 21. 
Murex Smithii . Var. /3. Spire produced. Sowerby, Min. 
Conch. VI. p. 151, ph 578, fig. 3. 
Nearly orbicular; body large; spire short, consisting of three 
rounded, slightly depressed volutions, and terminating in a 
blunted apex; body covered with large, distant knobs, set in 
three interrupted rows; aperture ovate, narrowed above; cha¬ 
racter of the beak unknown. 
Found in the London Clay at Maida Hill, Paddington. 
This species and the two preceding are nearly allied to each other. 
5. P. Smithii. —Smith’s Pyrula, pi. XXXIV. fig. 26, 27. 
Murex Smithii . Sowerby, Min. Conch. VI. p. 151, pi. 578, 
fig. 1, 2. 
Pyriform ; body large in proportion to the spire, which con¬ 
sists of four depressed volutions, hardly a sixth the length of 
the body; on the body are three rows of oblong, short, blunted 
tubercles, those of the superior row being the largest, and more 
pointed than the others; whole shell covered with unequal 
spiral stria?; beak considerably produced, and appears but little 
curved; aperture subquadrangular, extending from the superior 
portion of the body; inner lip not thickened upon the colu¬ 
mella; outer lip thin. 
Found in Alum Bay, Isle of Wight. 
Genus XXIII.—FUSUS.— Lamarck. 
Shell fusiform, or subfusiform; spire usually turreted, 
with many rounded volutions, and gradually acuminated, 
generally terminating in a pointed apex, although it is 
sometimes mamillary; for the most part with longitudinal 
ribs and spiral grooves; aperture elliptical, terminating in 
a lengthened, straight canal. 
1. F. regclaris. —The Straight Fusus, pi. XXXV. fig. 15, 
16, and pi. XXXVI. fig. 22, 23. 
Murex antiquus . Brander, Foss. Ilant. p. 33, pi. 6, fig. 74. 
Murex regtdaris, Sowerby, Min. Conch. V. p. 27, ph 423, fig. 
1, and II. p. 195, pi. 187, fig* 2. 
Elongated; spire moderate, consisting of from five to eight 
well rounded and somewhat inflated volutions, flattened and 
nearly smooth above, terminating in a rather obtuse apex ; lon¬ 
gitudinally ribbed, and crossed by numerous, fine, irregular, 
spiral, sharp stria?; aperture elongated, wide, and somewhat 
rounded above, narrowed below, and ending in an open, nearly 
straight, rather short canal, which is contracted towards the 
point; inner lip smooth, in general broadly reflected on the colu¬ 
mella above, and diminishing as it descends ; outer lip sharp on 
the edge, and thin with a few plaits internally; aperture to the 
point of the beak equal in length to the other portion of the 
shell. 
Found at Barton Cliff by Miss Salisbury. 
2. F. complanatus. —The Flattened Fusus, pi. XXXV. 
fig. 21, 23, 24. 
Fusus complanatus. Sowerby, Min. Conch. V. p. 27, ph 
423, fig. 2, 3. 
Fusiform; spire consisting of five volutions, with their upper 
edges elevated, and pressed upon the spire; the whole surface 
covered with large, oblique, longitudinal ribs, and crossed by 
numerous, close-set, spiral stria', with obtuse intervening ridges; 
aperture ovate, contracted both above and below, and ending 
in a curved, slightly expanding canal of medium length ; inner 
lip smooth, narrowing as it descends; outer lip sharp on the 
edge; beak somewhat shorter than the spire. 
Figure 21 is a variety in which the longitudinal ribs are more 
prominent than the others, and with a sub-carina in the middle of 
the body. 
Found in the London Clay at Ilighgate Hill. 
