108 GASTEROPODA. LIMNADZ. 
Whorls transversely striated. Spiral part of the animal, 
when viewed through its horn-coloured shell, is dusky-black, 
spotted, and marbled with golden yellow ; the same part, when 
the shell is removed, is pure black, marbled, and spotted with 
grey. Head, neck, sides, and upper part of the foot, testaceous, 
pale-orange, or grey, punctured with opake white. The ten- 
tacula paler than the body. 
This species is very local. It occurs in the New River, near 
London ; in ditches around Eton; in the river at Oxford ; in 
the Avon, in Wiltshire; and in the Kennet, in Berkshire. 
I believe that Dr. Fleming informed me, some years since, 
that he had met with this species in Scotland ; but this is ren- 
dered a little doubtful from his statement in the Edinburgh 
Encyclopzedia, which seems to arise from an error in the punc- 
tuation. 
Genus 47. Myxas. 
Testa spira brevissima, depressiuscula. Peritrema 0. Um- 
bilicus 0. Tentacula latissima. Pallium utrinque in mem- 
branam dilatatum testam modo non tegens. 
Shell with a very short and rather depressed spire. Peri- 
treme none. Umbilicus none. Tentacula very broad. Sides 
of the mantle dilated into a membrane, which almost entirely 
covers the shell. 
}. Myxas MUuueri. 
M. testa ventricosa, cornea, pellucida, nitida; anfractibus trans- 
versim striatis. 
Helix fragilis, Zinn. Fn. Sv. 2187. 
Buccinum glutinosum, Mill. Verm. Hist. 323. 
Helix glutinosa, Gmel. Syst. Nat. 3659; Mont. Test. Brit. 
379. t. 16. fig. 5; M. & R. Trans. Innn. Soc. vii. 222 ; 
Dill. Conch. Dict. 970 ; Turt. Conch. Dict. 69. 
Bulimus glutinosus, Brug. Encyel. Méth. Vers, 306. 
Limneus glutinosus, Drap. Hist. des Moll. 50. 
Habitat in paludibus, rarior. 
Shell ventricose, horny, pellucid, glossy ; the whorls striated 
transversely. 
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