LIMNEANA. MOLLUSCA. LIMNiEA. 221 



Limn^'a eludes. 



Shell turrctted, elongated^ dull horn-colored ; ivhorlsjive, con- 

 vex ; suture deep ; aperture sub-oval, less than half the length of 

 the shell, within hroumish, fold of the columella yrofound. 



Figure 145, 14G, 147. 

 State Coll., No. 139. Soc. Cab., No. 1301. 



Lymneus eludes, Say; Journ. Jicad. Kat. Sc, ii. 1G9. ^mer. Conch., pi. 11, f. 3. 



Shell tapering, elongated, turretted, thin and fragile, dull and 

 dingy horn-colored, inelegant ; whorls five, or a little more, the 

 two smallest being generally broken off ; they are regularly and 

 largely convex, not flattened or compressed posteriorly, but the 

 adjacent margins of two whorls curve regularly to the deeply im- 

 pressed suture ; the last whorl, measured upon the back, consti- 

 tutes from a little more than one half, to about two thirds the 

 whole length of the shell ; surface coarsely wrinkled by the lines 

 of growth, sometimes minutely reticulated by revolving lines, and 

 sometimes exhibiting small, plane facets, irregularly disposed. 

 Aperture generally less than, but never exceeding one half the 

 length of the shell ; sub-oval, rather contracted ; right lip thin, 

 with now and then a sub-marginal thickening, within colored red- 

 dish-brown ; pillar margin copiously overlaid with white enamel, 

 not closely appressed at the umbilical region ; fold of the pillar 

 large and oblique ; umbilicus for the most part closed. Length 

 -j~ inch, breadth f*^ inch, divergence 43 to 45^. 



The animal is of a dusky-greenish color, similar to that of th© 

 shell, varying like it in intensity, minutely dotted with amber- 

 color. Foot somewhat paler, tongue-shaped, reaching about two 

 thirds the length of the large whorl when in motion, obtusely 

 rounded behind. 



The animal attains maturity and dies about the end of June. 

 At this time the young may be seen with the old, about an eighth 

 of an inch in length, and these continue to grow rapidly during the 

 season. But after the early part of July it is rare to find an adult 

 shell containing a living animal. At this time the exterior of the 

 shell is much eroded ; in fact the animals, as they cluster together. 



