History of British animals - University of Guam Marine Laboratory

Limnea. MOLLUSCA. PULMONIFERA. 275Mont. Test. Brit. 373, tab. xvi. f. 3—L. ovatus, Drap. Moll. 50—Inponds and rivers. Common.Length seldom exceeding an inch ; translucent, with minute lines ofgrowth, and longitudinal wrinkles.—This shell, every where abundant, exhibitsconsiderable differences in its mode of growth and forms, according to theplaces it inhabits, and has given rise to the construction of many spuriousspecies.— 112. L. auricularia. — Whorls four, the three first minute,flat pointed.Buccinum pellucidum, subflavum, quatuor spirarum, mucrone acutissimo,testae apertura omnium maxima, List. An. Ang. 139. Conch,tab. 123, 22—H. f. auricula, Linn, i.Syst. 1250. Penn. Brit. Zool.iv. 138. Mont. Test. Brit. 375, tab. xvi. f. 2 In stagnant pools. England.Length about an inch, thin, subpellucid, striated across, and wrinkled longitudinallymouth wide ; ; the outer lip semicircular.— This species is oftenconfounded with the preceding, from which it differs in the apex being morepointed, the three first spires more minute, and the outer lipmore expanded.113. L. glutinosa.— Whorls three; the two first minute, thelast ventricose, and diaphanous.Bucc. glut. Mull. Verm. ii. 12G—Helix glut. Mont. Test. Brit- 379,tab. xvi. f. 5.— In ponds. England.Length about half an inch, thin, fragile, glossy, nearly smooth ; apertureoval, without the fold on the pillar-lip. Animal large in proportion to itsshell ;of a yellow colour.114. L. lutea.— Whorls scarcely three; the last large in proportion; 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 thisas a sea-shell; while the last states that he has taken it in abundance atWinthorpe, on the banks of the Trent, after a flood, and at least thirty milesabove its junction with the salt-water. He adds, " it probably inhabits thedepths of rivers.",115. Assiminea Grayana.— Dr Leach sent me, several yearsago, a shell, from Greenwich " marshes, constituting a new fresh1 ''water genus, under the title Assiminea Grayana. The lipisthickened on the pillar,and reflected over the cavity, but is destituteof the oblique fold ;and the lip does not extend over thebody-whorl. The colour is brown ;the whorls six in number,conical, regularly increasing in size, glossy, with minute lines ofgrowth. Length about Ta 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*£ 2, 3— Fresh water formation, Isle of Wight.S 2