58 
MOLLUSCA. 
Typhis. 
obtuse; body bicarinated, which become obsolete in the spire; 
whole shell covered with regular elevated stria?, which are 
obscurely decussated by the lines of growth ; aperture subquad- 
rangular; canal very short and nearly straight. 
Found at Blackdown. 
13. M. sexdentatus -The Six-toothed Murex, pi. 
XXXIV. fig. 17, 18. 
Murex sexdentatus. Sowerby, Min. Conch. V. p. 10, pi. 
411, fig. 3. 
Oblong-ovate; spire nearly as long as the body, consisting of 
five ventricose volutions, well defined by the suture; whole 
shell provided with numerous longitudinal ribs, which, with the 
intervals between them, are decussated with strong, sharp, spiral 
stria?; aperture elongated; slightly narrowed beneath; inner 
lip smooth, behind which at its termination is a subumbilicus; 
outer lip somewhat thickened with five or six obtuse teeth 
inside. 
Discovered at Colwell Bay, Isle of Wight, by Professor 
Sedgwick. 
14. M. tortuosus. —The Tortuous Murex, pi. XXXIV. 
fig. 29, 30. 
Murex turtuosus. Sowerby, Min. Conch. V. p. 48, pi. 434, 
fig. 2. 
Turreted; spire consisting of four or five broad volutions; 
body and spire with three elevated flexuous subfoliaceous 
varices, with two or three knobs between each ; and crossed by 
wide-set, transverse, nearly obsolete ribs upon the middle and 
lower portion of the volutions, and a fourth situate near the 
superior part of the volutions; beak short, slightly bent; aper¬ 
ture oblong-ovate; inner lip smooth, a little reflected on the 
columella; outer lip rather thin and straight, thickened within. 
A Crag fossil, found at Woodbridge, by Mrs. Cobbold. 
13. M. Haccanensis —The Hackness Murex, pi. XXXIV. 
fig. 28. 
Murex Haccanensis . Phillips, Geo. York, I. p. 102, pi. 4, 
fig. 18. 
Turreted; spire abruptly tapering, with six or seven volutions; 
with nine or ten strong, elevated, longitudinal ribs, transversely 
striated; aperture obovate; outer lip thin; base of body with 
several nearly obsolete, transverse folds. 
Found in the Coralline Oolite at Hackness. 
Genus XX.—TYPHIS.— Fleming. 
Shell subcylindrical, subturreted; volutions provided 
with numerous cylindrical, pervious processes; aperture 
suborbicular; beak short, with a closed tubular canal. 
1 . T. fistulosus —The Pipe Typhis, pi. XXXIV. fig. 
5, 6. 
Murex fistulosus. Brocchi, Sub. App. II. p. 394, pi. 7, fig. 
12 . Sowerby, Min. Conch. II. p. 201. Murex pungens , 
Brander, fig. 82. Typhis fistulosus, Fleming, Brit. An. 
p. 356. 
Subcylindrical, provided with several thick, somewhat foliated 
varices, each terminating above in a slightly recurved tube, 
most of which are truncated and perforated; spire short, con¬ 
sisting of four or five rapidly decreasing volutions, and termi¬ 
nating in an acute apex; aperture entire, subovate; both lips 
continuous, the left or outer one with a marginal foliated 
varixo, and four or five sinuated fimbria? behind; beak nearly 
straight, closed in front, and obliquely truncated below. 
In old shells the beak is frequently double, and sometimes even 
triple; diameter of the shell about half its length. 
Found at Barton Clitf. 
2. T. tubifer —The Tubular Typhis, pi. XXXIV. fig. 
3, 4. 
Murex tubifer . Lamarck, Env. de Paris, p. 54. Parkinson, 
Org. Remains, III. p. 65, pi. 5, fig. 15. Murex pungens , 
Brander, p. 35, fig. 81. M. horridas, Brocci, Sub. App. II. p. 
405, pi. 7- Typhis tubifer , Fleming, Brit. An. p. 356. 
Oblong-ovate, with four or five rapidly decreasing volutions, 
each furnished with four or five longitudinal rows of tubular 
spines, generally set in threes, between each of which is placed 
a solitary, erect, somewhat arcuated tube, situate upon the 
superior portion of the volution, a little pointed, somewhat 
oblique, sometimes double, and open at the base. 
Found at Barton Clift', in the London Clay. 
In the young state the beaks of this species, as well as that of 
fistulosus, are open. 
Genus XXI.—R AN E L LA.— Lamarck . 
Shell oval or oblong; subcompressed; with depressed, 
straight or slightly oblique distichous varices, situated at 
intervals of half a volution, forming a continuous longi¬ 
tudinal row on each side; aperture subovate; base canali- 
culated, and frequently with a small canal above, at the 
junction of the outer and inner lips; outer lip grooved 
with its edge crenated or dentated; inner lip usually 
rugose; the outside more or less tuberculate, frequently 
set in small bead-like rows, and generally covered with a 
thickish olivaceous epidermis. 
1 . R. Bartonensis —The Barton Ranella, pi. XXXV. 
fig. 1, 2, 3. 
Murex Bartonensis. Sowerby, Min. Conch. I. p. 77 , pi. 
34. Three lower figures. 
Oblong-ovate; spire about half the length of the body, con¬ 
sisting of four gently tapering somewhat rounded volutions, ter¬ 
minating in an obtuse apex; the body and two lower volutions 
of the spire with numerous, nearly straight, longitudinal ribs, 
the interstices being crossed by fine, regular, transverse stria?, 
producing a beautifully cancellated appearance; aperture ob¬ 
liquely elongated, curved, and acute at both extremities; having 
a shallow.groove or canal above, and with an oblique canal 
below; inner lip smooth and broadly reflected on the columella, 
somewhat raised, and extending to nearly the superior region of 
the body, where it is continuous with the outer lip, which is 
undulate, the margin also very broad, and toothed within, with 
a furrow which extends from the fourth tooth to the beak; 
inner lip also toothed; beak short, thick, and curved. 
Not quite half an inch in length. 
Found at Barton Clift*, by the Rev. W. Bingley. 
