INVOLUTE.] 
4. LyMN#A ELonGaTA, pl. XV, f. 1, 2, 3, and 5—First 
Ed., pl. 42, f. 1, 2, 3, and 5. 
Lymneus elongatus, Drapernaud, p. 52, pl. 3, f. 3,4; Turton, 
Man., p. 122, f. 106; Alder, Mag. Zool. and Bot., II, p. 115; 
Lymnea leucostoma, Lamarck, An. San. Vert., VI, pt. 2nd, p. 
162; Lymneus elongatus, Rossmassler, Icon., I, p. 101, pl. 2, f. 
58; Limnea elongata, Sowerby, Genera, f.6; Limneus glaber, 
Thompson, Ann. and Mag. Nat. Hist., VI, p. 32; Helix octan- 
fracta, Montagu, Test. Brit., p. 396 and 588, pl. 11, f. 85 
Brown, Ency. Brit., VI, p. 461; Helix octona, Pennant, Brit. 
Zool., IV, p. 138, pl. 8, f. 139; Helix perigrina, Dillwyn, Des. 
Cat., p. 954; Stagnicola octanfracta, Leach, Moll., p. 141. 
Shell horn-coloured, smooth, pellucid, greatly elongated; 
body not half the length of the shell; spire long, tapering, con- 
sisting of seven or eight slender, gradually diminishing, some- 
what cylindrical volutions, terminating in an acute apex, these 
are very slightly wrinkled longitudinally, and the lower volutions 
sometimes obscurely striated transversely; aperture oblong, not 
a third the length of the spire; outer lip thin; inner lip white, 
and slightly reflected on the columella. 
This species is subject to variety, both in size and form, as 
will be seen by a reference to our figures; in some the spire 
terminates in a decollated apex. It also varies in the number 
of its volutions. 
Section II.—Subovate ; body ventricose ; aperture longer 
than the spire. 
5. Lymna auricuaria, pl. XV, f. 29, 30, 31, 32.—First 
Ed., pl. 42, f. 29, 30, 31, 32. 
Lymnea auricularia, Lamarck, An. San. Vert., VI, pt. 2nd, 
p: 161; Lymneus auricularis, Brard, p. 140, pl. 5, f. 2; Tur- 
ton, Man., p. 117, f. 100; Limneus auricularis, Pfeiffer, p. 85, 
pl. 4, f. 17, 18; Limneus auricularis, Drapernaud, p. 49, pl. 2, 
f. 28, 29, and 32; Rossmassler, Icon., I, p. 98, pl. 2, f. 55; 
Jeffreys, Linn. Tr., XVI, p. 372; Alder, Mag. Zool. and Bot., 
II, p. 115; Thompson, Ann. and Mag. Nat. Hist., VI, p. 29; 
Helix auricularia, Linneus, Syst. Nat., p. 1250; Pennant, Brit. 
Zool., IV, p. 138; Donovan, Brit. Sh., pl. 51, f. 1; Montagu, 
Test. Brit., p. 375, pl. 16, f. 2, and p. 381, pl. 16, f.1; Helia 
limosa, Fleming, Brit. An., p. 275; Brown, Wernerian Mem., 
II, p. 5313 Ib., Ency. Brit., VI, p.461; Radix awriculatus, 
De Montfort, II, p. 207; Gulnaria auricularia, Leach, Moll., 
p- 148; Buccinum auricula, Miiller, Verm., II, p. 126. 
Shell slightly ovate, thin, brittle, subpellucid, of a pale yel- 
lowish horn colour; body very large, ventricose, and slightly 
wrinkled longitudinally ; spire very short, consisting of three or 
four well defined volutions, terminating in an acute apex; aper- 
ture oblong-ovate, extremely wide, and large; outer lip greatly 
extended, and somewhat reflected at the margin; pillar lip 
smooth, broadly reflected on the columella, with a strong fold 
towards its lower part, and forming a slight umbilicus behind. 
Found in the riyer Avon, the Kennet, Berkshire; and in a 
ditch at Clonooney, King’s County, Ireland. 
6. LyMN#A PEREGRA, pl. XV, f. 8, 9, 10, 11, 36, 37, 38, 
39, 40.—First Ed., pl. 42, f. 8, 9, 10, 11, 36, 37, 38, 39, 40. 
Limnea peregra, Lamarck, An. San. Vert., VI, pt. 2nd, p. 
161; Limneus pereger, Pfeiffer, p. 90, pl. 4, f. 23, 24; Lim- 
neus pereger, Drapernaud, p. 50, pl. 2, f. 34 and 37; Turton, 
Man., p. 118, f.101; Jeffreys, Linn. Tr., XVI, p. 374; Alder, 
H 
MOLLUSCA. 29 
Mag. Zool. and Bot., II, p. 115; Thompson, Ann. and Mag. 
Nat. Hist., VI, p. 30; Lymnea putris, Fleming, Edin. Eney., 
VII, p-77; Lymnea limosa, Fleming, Brit. An., p. 274; Helix 
peregra, Gmelin, Linn. Syst. Nat., p. 3659; Montagu, Test. 
Brit., p. 373, pl. 16, f. 33 Helix putris, Pennant, Brit. Zool., 
pl. 86, f. 137; Brown, Wernerian Mem., II, p. 530; Ib., Ency. 
Brit., VI, p. 461; Helix limosa, Brown, Wernerian Mem., II, 
p: 530; Buccinum peregrum, Miiller, Verm., II, p. 134; Gul- 
naria peregera, Leach, Moll., p. 146. 
Variety 1. Ovate, aperture more dilated, pl. XV, f. 8, 9, 
10, 11.—Limnea ovata, First Ed. pl. 42, f. 8, 9, 10, 11. 
Lyninea ovata, Lamarck, VI, I, p. 121; Kenyon, Mag. 
Nat. Hist., II, p. 425, f. 2; Lymneus ovatus, Pfeiffer, p. 89, 
pl. 4, f. 21; Limneus ovatus, Drapernaud, p. 50, pl. 2, f. 30, 
31; Lymneus ovatus, Brard, p. 142, pl. 5, f. 4,5; Lymneus 
ovatus, Rossmassler, Icon., I, p. 100, pl. 2, f. 56; Limnea lineata, 
Bean, Mag. Nat. Hist., VII, p. 493, f. 62. 
Variety 2. Outer lip expanded, and with an internal rib, 
pl. XV, f. 37. 
Helix auricularia, var., Maton and Racket, Linn. Tr., VIII, 
p- 218, pl. 5, f. 8*; Lymnea marginata, Michaud, Compl., p. 
88, pl. 16, f. 15, 16. 
Variety 3. Shell small, stronger; spire but slightly pro- 
duced ; the outer lip not attenuated, pl. XV, f. 50, 51, and pl. 
XVIII, f. 17, 18.—First Ed., pl. 46, f. 50, 51. 
Helix lutea, Montagu, Test. Brit., p. 380, pl. 16, f.6; Maton 
and Racket, Linn. Tr., VIII, p. 222. 
Variety 4. Spire acute, and tapering. 
Lymneus acutus, Jeffreys, Linn. Tr., XVI, p. 373. 
Variety 5. With the volutions reversed. 
Limnea lineata, Bean, |. c.; Sturm, pl. 39. 
Shell ovate, thin, subpellucid, yellowish horn-coloured, slightly 
wrinkled longitudinally; body very tumid, and large; spire very 
short, consisting of three or four rapidly decreasing volutions, 
terminating in a sharp apex; aperture very large, oval, about 
three-fourths the length of the shell; outer lip thin; inner lip 
broadly reflected on the columella. 
This species is subject to considerable variety, both in form 
and size; and is plentifully diffused in almost all ditches, ponds, 
and lakes. 
We found variety 2, of the large size, figured in pl. XV, f. 
10, 11, in ditches at Bury, Lancashire. 
7. Lymn#a 1nvouuta, pl. XVIII, f. 5. 
Limneus involutus, Harvey; Alder, Mag. Zool. and Bot., II, 
p- 115; Thompson, Ann. and Mag. Nat. Hist., VI, p- 31. 
Shell very thin, pellucid, shining, rendering the columella visi- 
ble throughout its whole length; colour, pale amber; body very 
large, enveloping the spire, and provided with coarse, longitudi- 
nal strie ; spire very short, sunk, truncated at the apex, and 
sometimes concave, consisting of three volutions, none of which 
are visible in the profile of the shell; aperture very large, wide 
at the base, and extending to the apex; margin reflected only 
where it joins the pillar. J.ength five lines and a half; breadth 
three lines and a half. 
Its general aspect is not unlike Akera flexilis, in consequence 
of the aperture extending to the apex, and the appearance of 
the columella. 
This interesting and new species was discovered by William 
Henry Harvey, Esq., of Limerick, in a small alpine lake on the 
