Rostellaria. 
MOLLUSCA. 
55 
Shell turreted; spire costated, consisting of seven well 
defined volutions terminating in an acute apex, lower volution 
bicarinatcd; columella smooth; outer lip much developed and 
spreading, and with a canal at its upper extremity, consisting of 
one lobe only, and provided with a spine where the superior 
carina terminates upon its margin. 
Found in the stratum above the Coal, at Brora, Scotland, 
and in the Oxford Clay, at Weymouth, also at Scarborough. 
9 . R. calcarata _The Spur-shaped Rostellaria, pi. 
XXXIII. fig. 5, 6. 
Rostellaria calcarata . Sowerby, Min. Conch. IV. p. / 0, pi. 
349, fig. 6, 7. Parkinson, Organic Remains, III. p. 63, pi. 5, 
fig. 2. Fleming, Brit. An. p. 360. 
Shell turreted, with six or seven well defined volutions, 
crossed by numerous longitudinal, somewhat elevated, linear, 
curved ribs, and a few varicose sutures; lower or body volution 
carinated, having a principal and several smaller carinse; the 
whole exterior surface covered with close stria?; outer lip pro¬ 
vided with a large, oblong, squarish, ascending process, in the 
form of a curved spur or spine on its upper angle, which is pro¬ 
duced by an elongation of the larger keel; the superior canal of 
the lip short and obtusely pointed; beak short and somewhat 
acute; inner lip entire with its edges a little rounded. 
Found at Blackdown, in the Whetstone pits. 
10. R. trifida.— The Trifid Rostellaria, Phillips, Geo. 
of Yorkshire, I. p. 109? pi. 5, fig. 14. 
Shell provided with several carina?, the outer lip hardly 
expanded, and furnished with a long subspatulose, slightly 
ascending process; beak arcuated. 
Found in the Oxford Clay at Scarborough, by Mr. Bean. 
11 . R. angulata.— The Angled Rostellaria. 
R. angulata . Phillips, Geo. of Yorkshire. II. p. 230, pi. 16, 
fig. 16. 
“ Volutions angular, the upper ones tricarinate.” 
Found in the Mountain Limestone at Bolland, Queen’s 
County, Ireland. 
12. R. retusa _The Blunted Rostellaria, pi. XXXIII.* 
fig. 10. 
Rostellaria retusa . Sowerby, Geo. Trans. IV. p. 344, pi. 
18, fig. 22. 
Shell short ovate; body long, spire small, consisting of four 
narrow, rounded volutions, each provided with one distinct, 
elevated carina, and also an obsolete one; whole shell with a 
finely polished surface, and covered with close and fine spiral 
stria?; outer lip furnished with an elongated, narrow, slightly 
ascending, spur-like process, projecting from the elevated carina. 
SECTION III.—OUTER LIP NOT EXPANDED. 
13. R. lucida.— The Shining Rostellaria, pi. XXXIII. fig. 
20 , 21 . 
Rostellaria? lucida. Sowerby, Min. Conch. I. p. 203, pi. 
91, fig. 1, 2, 3. Fleming, Brit. An. p. 359. 
Shell glossy, fusiform; spire consisting of eight gradually 
tapering volutions, and terminating in a somewhat acute apex; 
body volution nearly equal in length to the spire; whole shell 
covered with many obtusely rounded, longitudinal volutions, 
and crossed by numerous, transverse, elevated, obtuse striae; 
inner lip smooth and broadly reflected on the columella; outer 
lip thickened and provided with a very short channel at its 
upper extremity, with an obscure sinus at its lower extremity, 
and terminating in a very short beak. 
We have not met with the immature shell, but Sow r erby says that 
its lip is not thickened ; and when the body volution is about half- 
formed its growth appears to cease and then the margin of the lip 
is inflected; and on its becoming perfect the outer lip is thickened, 
when the inflected part of the former lip is visible about half a 
convolution from the outer lip, in the form of a prominent rib. 
Found in the London Clay at Highgatc Hill. 
14. R. rimosa. —The Cleft Rostellaria, pi. XXXIII. fig. 
12, 13, 
Rostellaria rimosa. Sowerby, Min. Conch. I. p. 204, pi. 91? 
fig. 4, 5, 6. Fleming, Brit. An. p. 360. Mur ex rimosus , 
Brander, Fossil Hant. fig. 29. 
Shell fusiform and shining; body in front equal to about half 
the shell; spire consisting of eight or nine slightly convex 
volutions, which are but moderately defined by the suture, and 
terminate in an acute apex; whole shell covered with numerous, 
slightly rounded, longitudinal, sharp ribs, and transversely stri¬ 
ated; columella strongly defined, arid extending to the superior 
margin of the fifth or sixth volution of the spire; aperture 
obliquely ovate, contracted at both extremities, with a long un¬ 
dulating and pretty deep canal, extending as far as the extremity 
of the columella; outer lip reflected, and slightly flattened in 
front, with a sinus towards its lower extremity; beak straight 
and short. 
This species varies considerably from its young to its adult state; 
in the very young stage, the reflected and extended columella and 
lip are not formed, although the lip in this condition is frequently 
thickened; and when more advanced, or about half its full size, 
the lip extends over about two volutions, which when mature reaches 
the fifth or sixth volution, terminating in a gentle curvature. 
Found plentifully in the London Clay at Barton Cliff. 
15. R. elongata. — The Elongated Rostellaria. pi. 
XXXIII* fig. 5. 
Rostellaria elongata. Sowerby, Geo. Trans. IV. 2nd series, 
p. 336, pi. 11, fig. 16. 
Shell turreted, greatly elongated ; body and spire nearly of 
equal length, the latter consisting of four or five volutions, 
divided by a broad, hollow suture, crossed by a longitudinal 
series of ribs, and transversely striated ; the upper edges of the 
volutions smooth; aperture subovate, pointed, both above and 
below; inner lip with a sub-umabilicus. 
Found by Dr. Fitton, in the Gualt. 
16. R. marginata. — The Marginated Rostellaria, pi. 
XXXIII* fig. 6, 7. 
Rostellaria marginata . Geo. Trans. IV. 2nd series, p. 336, 
pi. 11, fig. 18. 
Shell conical, turreted; body and spire nearly equal, the 
latter consisting of six or seven moderately inflated volutions, 
divided by an elevated, linear suture, each volution provided 
with eight or ten longitudinal, short, obtuse ribs, crossed by 
numerous stria?; the body destitute of ribs and furnished with 
a nearly central, elevated carina; aperture slightly ovate. 
This species is nearly allied to Rostellaria Parkinsoni , but may at 
once be distinguished by the spiral, elevated band which divides the 
volutions. 
Found in the Gualt. 
17. R. Buccinoides. —The Buccinum-shaped Rostellaria, 
pi. XXXIII.* fig. 9. 
