FAMILY 2. COLIMACEA. 89 
that attracted their attention. Lamarck soon discovered the necessity of 
separating the Succinee from the Helices: from the fact of their living 
upon the banks of stagnant waters, he considered them to be amphibious, 
intermediate in their organization between the Bulimi and the Lymnee, 
and the title under which he proposed to distinguish them was that of 
Amphibulina. Draparnaud, however, claimed priority, and Lamarck at 
length consented to abandon the appellation of Amphibulina for that of 
Succinea, although both of these generic terms are now used by some 
writers in reference to different varieties. 
The shell of Succinea may be described as being fragile, and ovate or 
ovately conical, with a small spire ; the aperture is large, entire and lon- 
gitudinal, with the margins disjoined ; the lip is acute, not reflected, and 
the columella is smooth, narrow, and attenuated towards the margin. 
Examples. 
Pl. CLXXX. Fig. 1. 
SuccinEA cucuLLatTaA, Lamarck, Anim. sans vert., new edit., vol. vill. 
p- 315. De Férussac, Hist. Moll., pl. 11. f.14 to16; and pl. lla. 
f. 12 and 13. 
Amphibulina cucullata, Lamarck (Ann. du Mus.). 
Bulimus patulus, Bruguiére. 
Helix (Cochlohydra) patula, De Férussac. 
Pl. CLXXX. Fig. 2. 
Succinga optusa, Sowerby, Genera of Shells, No. 9. 
Pl. CLXXX. Fig. 3. 
Succinea ampuipia, Draparnaud, Hist. Moll. terr. et fluv., pl. 3. f. 22 
and 23. Chemnitz, Conch., vol. ix. pl. 135. f. 1248. 
Helix putris, Linneus. 
Helix succinea, Miller. 
Bulimus succineus, Bruguiére. 
Turbo trianfractus, Da Costa. 
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