MOLLUSCA. 
96 
5. Melania lineata —The Lineated Melania, pi. XLV. 
fig. 31, 32. 
Melania lineata . Sovverby, III. p. 33, pi. 218, fig. 1. Fle¬ 
ming, p. 317. 
Acuminated; body short; spire long, with nine or ten slightly 
raised volutions, with a slight constriction towards the upper 
portion of each; whole surface covered with very fine, regular 
striae, which is slightly bent towards the base of each volution, 
and on the body they follow the curve of the outer lip; aper¬ 
ture subovate, a little contracted above, and rounded beneath. 
Length about four times the diameter of the body. 
Inferior Oolite, Dundry. 
6. Melania Heddingtonensis —The Heddington Mela¬ 
nia, pi. XLV. fig. 33. 
Melania Heddingtonensis . Sowerby, I. p. 86, pi. 39, right 
and left hand figures. Fleming, p. 317. Phillips, I. p. 116. 
Fusiform; body short; spire long, with eight or ten nearly 
flat-sided volutions, with their upper portion slightly raised and 
obtusely angular, and a little hollow in the middle; whole sur¬ 
face rugged, with rather deep lines of growth. Length about 
three times its diameter. 
Upper and Middle Oolite at Heddington, near Caine, Wilts. 
7. Melania striata —The Striated Melania, pi. XLV. 
fig. 35. 
Melania striata. Sowerby, I. p. 101, pi. 47. Fleming, p. 
317. 
Elongated, abruptly tapering to the apex; spire with eleven 
or twelve well separated, somewhat inflated volutions; body 
nearly half the length of the shell; whole surface covered with 
spiral, narrow, slightly elevated ribs, with about sixteen on each 
volution, crossed by as many somewhat sharp, but fine longitu¬ 
dinal stria?. Length about twice and a half its diameter; some¬ 
times occurring about eight inches in length. 
Lias at Lymingt.on, Somersetshire. 
8. Melania fasciata. —The Banded Melania, pi. XLV. 
fig. 36, 37, 38. 
Melania fasciata. Sowerby, III. p. 71, pi. 241, fig. 1. Fle¬ 
ming, p. 317. 
Turreted; spire consisting of about five volutions, each coro¬ 
nated with rather remote, obtuse knobs; surface with three 
slightly coloured, transverse bands, and numerous spiral striae; 
aperture ovate, oblique. Fig. 38, natural size. 
Fresh Water formation, Isle of Wight. 
9. Melania? vittata. —The Filleted Melania, pi. XLV. 
fig. 34. 
Melania vittata. Phillips, I. p. 116, pi. 7, fig. 15. 
Elongated; volutions deeply defined, with an obliquely flat¬ 
tened fillet on the superior portion of each, and hollow in the 
middle. 
Cornbrash at Scarborough and Gristhorpe. 
10. Melania costata —The Ribbed Melania, pi. XXXV. 
fig. 39, 40, 41. 
Melania costata. Sowerby, III. p. 71, pi. 241, fig. 2. Fle¬ 
ming, p. 317. 
Turreted; spire long, consisting of six or seven gradually 
tapering, nearly flat-sided volutions, with numerous, longitudi¬ 
nal, slightly elevated ribs, crossed by fine spiral stria?; aperture 
ovate, oblique. Length about three times its diameter. Fig. 
41, natural size. 
Melania. 
11. Melania tumida.— The Swollen Melania, pi. XLV. 
fig. 42. 
Melania tumida . Phillips, II. p. 229, pi. 16, fig. 2. 
Turreted, smooth; body short; spire long, consisting of 
about eight very tumid, and deeply defined volutions; whole 
surface covered with fine, regular, longitudinal stria?; aperture 
oblique, ovate, wider than long. 
Mountain Limestone, Kildare and Bolland. 
12. Melania constricta— The Constricted Melania, pi. 
XLV. fig. 43, 44. 
Melania constricta. Sowerby, III. p. 33, pi. 218, fig. 2. 
Fleming, p. 317. Phillips, II. p. 228, pi. 16, fig. 1. Conchby - 
liolithus constrictus , Martin, Pet. Derb. I. pi. 38, fig. 3. 
Turreted, smooth; spire of eight or nine volutions, con¬ 
stricted above, tumid on their lower parts, with an adprcssed, 
crenated, sutural, fimbriated margin. 
Mountain Limestone at Tideswell, Derbyshire, and Kildare. 
13. Melania rugifera —The Rugged Melania, pi. XLV. 
fig. 45. 
Melania rugifera. Phillips, II. p. 229, pi. 16, fig. 26. 
Turreted, greatly elongated, smooth, finely striated; body 
short; spire long, consisting of eleven or twelve volutions, con¬ 
vex below, and adpressed at the suture, on the lower half of 
each, oblique, slightly arcuated, very strong, longitudinal ribs, 
which are very prominent at their base, terminating in an acute 
apex; aperture subovate. 
Mountain Limestone, Otterburn, Northumberland, &c. 
14. Melania compressa. —The Compressed Melania, pi. 
XXXIII* fig. 28, 29. 
Elongated; body and spire about equal in length; the latter 
with six or seven abruptly tapering volutions, separated by a 
deep waved, sutural line, and terminating in an acute apex, a 
spiral depression occupies the upper portion of each; whole sur¬ 
face marked by irregular waved, longitudinal striae. 
Found at Gisborne, Yorkshire, by Mr. S. Gibson, of Hebden 
Bridge, and in his cabinet. 
FAMILY VIII.-LY 7 MN,F;CEA. 
Shells spiral, generally smooth on the external sur¬ 
face; margin of the outer lip always acute, and not 
reflected. The animals of this family are fluviatile, am¬ 
phibious, and usually destitute of an operculum. 
Genus LI.—LYMNiEA_ Lamarck. 
Shell oblong, thin, sometimes elongated, and acutely 
turreted; spire always produced; aperture large, entire, 
oblong, generally straitened, somewhat acuminate above, 
and rounded below; outer lip acute; the lower part of 
the inner lip ascending on the columella, forming an 
oblique fold, or plait, and rising, spreads more or less on 
the columella, or front of the body volution; external 
surface smooth, frequently polished; destitute of an 
operculum. 
