54 
MOLLUSCA. 
Rostellaria. 
and 300. Strombus amplus, Brander, p. 76. Hippocrenes 
macropterus , Mont fort, II. p. 523. 
Shell fusiform, smooth; spire taper, acute, the sides of which 
are flat, consisting of from ten to fourteen volutions, defined 
only by the suture line, and terminating in a sharp apex; aper¬ 
ture oblong-ovate, much contracted, and acute above and below; 
inner lip smooth, shining, very broadly reflected on the colu¬ 
mella, extending over three-fourths of the body in front, and in 
some instances with a second and more thickened reflection (as 
in fig. IS) spreading entirely around the base, and extending to 
the point of the beak; outer lip very large, spreading, and semi¬ 
circular, in the form of an expansive wing, extending in some 
instances from the fifth or sixth volution of the spire, encom¬ 
passing the apex, and projecting considerably beyond the spire; 
at the upper junction of the two lips there is a variously bent 
and long canal, which is sometimes nearly concealed by a reflec¬ 
tion of the superior portion of the outer lip; beak short and 
pointed, extending a little way beyond the lip, with a contracted 
canal. 
This shell is subject to much variety in form; in some specimens 
the external edge of the outer lip is provided with a deep sinus in 
the upper part which separates it from the canal near the spire, as 
in fig. 18. In young shells there is no development of the outer 
lip, and they may be in consequence mistaken for a Fusus , as in fig. 
19. Its sides are nearly parallel, and its surface very smooth and 
shining. 
Found in the London Clay at Hordwoll and Highgate. 
SECTION II.—SHELLS TURRETED, OUTER LIP SINUATED. 
2 . R. pes pelicani. — The Pelican’s Foot Rostellaria, pi. 
XXXIII. fig. 16. 
Rostellaria pes pelicani . Parkinson, Org. Rem. III. p. 63. 
Lamarck, An. San. Vert. VII. p. 193. Sowerby, Min. Conch. 
VI. p. 109, ph 558, fig. 1. Fleming, Brit. An. p. 359. Strom¬ 
bus pes pelicani , Linn. Syst. Nat. II. p. 1207. Mont. Test. 
Brit. p. 253. Brown, Illust. Brit. Conch, pi. 5, fig. 21, 39. 
Spire pyramidal, tapering to a fine point, and consisting of 
eight or ten transversely ribbed and carinated volutions, termi¬ 
nating in an acute apex; body volution with two rows of tuber¬ 
cles placed upon the keels; outer lip greatly expanded and 
quadrifid, its upper angle extending high upon the spire; base 
ending in a short acutely pointed beak with a shallow canal in 
its centre. 
This species varies considerably as to the development of the 
outer lip, and presents very different aspects in its progress from 
the young to the adult condition. 
Discovered in a Clay pit at Tottenhill, near Lynn, Norfolk; 
it has also been met with in the Suffolk Crag and at Swaffham. 
3. R. Parkinsoni. —Parkinson’s Rostellaria, pi. XXXIII.* 
fig. 12, 13, 14, 15. 
Rostellaria Parkinsoni, Sowerby, Min. Conch. IV. p. 69, 
pi. 349, fig. 1 to 5. Ib. VI. p. 112, pi. 558, upper fig. 3. Ib. 
Geo. Trans. IV. 2nd series, p. 344, pi. 18, fig. 24. Mantell. 
Geo. of Sussex, p. 72, 82, and 108. Fleming, Brit. An. p. 360, 
Rostellaria having only one spur-like process, Parkinson, Org. 
Rem. III. p. 63, pi. 5, fig. 11. 
Shell turreted, with numerous oblique, long longitudinal ribs, 
and transversely striated; the lower volution of the spire, 
ribbed and obscurely carinated; outer lip considerably ex¬ 
panded, with but one large, subulate, spur-like process, directed 
upwards, with a broad, angular expansion under it; aperture 
elongated and narrow; beak long, subulate, and pointed; the 
canal very narrow beneath. 
Found at Blackdown, Faversham, in the Green sand and 
Gray Chalk Marie. 
4. R. Fittoni. —Fitton’s Rostellaria, pi. XXXIII.* fig. 15. 
Rostellaria Parkinsoni . Sowerby, Min. Conch. VI. p. 112, 
pi. 558, lower fig. 3. 
Shell turretted; body and spire nearly of equal length ; spire 
consisting of six somewhat flattened volutions; and with nume¬ 
rous longitudinal, somewhat oblique ribs; body with a carina 
near its upper extremity; lip expanded, the carina crossing it 
behind, and some longitudinal wrinkles near its margin; beak 
short and nearly straight. 
Found at Feversham. 
5. R. Macrostoma. —The Long-mouthed Rostellaria, pi. 
XXXIII* fig. 11. 
Rostellaria macrostoma. Sowerby, Geo. Trans. IV. 2nd 
series, p. 344, pi. 18, fig. 23. 
Shell turreted; body large; spire short, consisting of four or 
five rounded carinated volutions, five on each, the centre one 
the most prominent; aperture small, round; outer lip greatly 
expanded and flattened, provided with two lobes; beak curved. 
Found iu the Green sand of Blackdown. 
6. R. bispinosa. —The Two-spined Rostellaria, pi. XXXIII. 
fig. 14. 
Rostellaria bispinosa. Phillips, Geo. of Yorkshire, I. p. 107, 
pi. 40, fig. 32, and pi. 6, fig. 13. 
Shell turreted; spire consisting of seven deeply divided 
volutions terminating in an acute apex, with an acute spiral 
carina in their centre, which emanates from the superior portion 
of the body; and giving to the volutions a triangular form; 
beneath this on the body is another smaller keel; beak of 
moderate length, and terminating in a sharp point. 
Found in the Lower Calcareous grit, and in the Kelloways 
Rock, by Mr. Williamson, Scarborough. 
7. 1L carinata —The Keeled Rostellaria, pi. XXXIII. 
fig. 11, pi. XXXIII* fig. 8. 
Rostellaria carinata. Mantell, Geo. of Sussex, p. 86, pi. 
19, fig* 10, 11, 12, 14. Sowerby, Geo. Trans. IV. 2nd series, 
p. 337, ph 11, fig. 10. 
Shell turreted; spire acute, nearly subulate, consisting of 
eight or nine convex volutions, which are ornamented with a 
series of regular rather elongated small tubercles, assuming 
somewhat the aspect of ribs, in the centre of the spire; body 
provided with two carina? a little above its centre; whole shell 
covered with minute spiral stria?; aperture ovate, contracted 
both above and below, and ending in a wide canal; outer lip 
furnished with a long, farcated projection, produced by an 
elongation of the upper keel on the back of the shell; beak 
long and subulate. 
Found in the blue Chalk Marie, at Laughton, Ringmer, and 
Norlington. 
8. R. composita. —The Composite Rostellaria, pi. XXXIII. 
fig. 22. 
Rostellaria composita. Sowerby, Min. Conch. VI. p. Ill, 
pi. 558, fig. 2. Phillips, Geo. of Yorkshire, I. p. 124, pi. 9, 
fit*. 28. 
