limnea. mollusca. pulmonifera. m 
Mont. Test. Brit. 373, tab. xvi. f. 3 — L. ovatus, Drap.^Moll. 50 — In 
ponds and rivers. Common. 
Length seldom exceeding an inch ; translucent, with minute lines of 
growth, and longitudinal wrinkles — This shell, every where abundant, exhi- 
bits considerable differences in its mode of growth and forms, according to the 
places it inhabits, and has given rise to the construction of many spurious 
species. 
112. L. auricularia. — Whorls four, the three first minute, 
flat pointed. 
Buccinum pellucidum, subflavum, quatuor spirarum, mucrone acutissi- 
mo, testse apertura omnium maxima. List. An. Ang. 139. Conch, 
tab. 123, f. 22 — H. auricula, Linn. Syst. i. 1250. Penn. Brit. Zool. 
iv. 138. Mont. Test. Brit. 375, tab. xvi. f. 2 — In stagnant pools. Eng- 
land. 
Length about an inch, thin, subpellucid, striated across, and wrinkled lon- 
gitudinally ; mouth wide ; the outer lip semicircular.— This species is often 
confounded with the preceding, from which it differs in the apex being more 
pointed, the three first spires more minute, and the outer lip more expanded. 
113. L. glutinosa. — Whorls three; the two first minute, the 
last ventricose, and diaphanous. 
Bucc. glut. Mull. Verm. ii. 126 — Helix glut. Mont. Test. Brit. 379, 
tab. xvi. f. 5.— In ponds. England. 
Length about half an inch, thin, fragile, glossy, nearly smooth ; aperture 
oval, without the fold on the pUlar-lip. Animal large in proportion to its 
shell ; of a yellow colour. 
114. L. lutea. — Whorls scarcely three; the last large in pro- 
portion ; pillar-lip spreading. 
H. lutea, Mont. Test. Brit. 380, tab. xvi. f. 6. Turt. Conch. Diet. 69* 
Shepp. Linn. Trans, xiv. 169. England. 
Length half an inch, suboval, subpellucid, yellow, smooth, apex obtuse, 
aperture patulous, oval. — The two authors first quoted seem to consider this 
as a sea-shell ; while the last states that he has taken it in abundance at 
Winthorpe, on the banks of the Trent, after a flood, and at least thirty miles 
above its junction with the salt-water. He adds, “ it probably inhabits the 
depths of rivers.’’ 
115. Assiminea Grayana. — Dr Leach sent me, several years 
ago, a shell, from Greenwich marshes, constituting a new fresh 
water genus,” under the title Assiminea Grayana. The lip is 
thickened on the pillar, and reflected over the cavity, but is des- 
titute of the oblique fold ; and the lip does not extend over the 
body-whorl. The colour is brown ; the whorls six in number, 
conical, regularly increasing in size, glossy, with minute lines of 
growth. Length about /^ths of an inch. 
EXTINCT SPECIES. 
1. L.fusiformis — Subfusiform, smooth; sides of the spire nearly straight ; 
aperture narrow, half the length of the shell. Sower. Min. Conch, tab. 169, 
f. 2, 3 — Fresh water formation. Isle of Wight. 
s 2 
