SPURIOUS SPECIES OF LIMN^A. tl 



four whirls, pale red ; aperture one-tliir<l the shell's length, 

 breadth one-third of its length. Very rare. In brooks. 



Limnsea lubricoldes, Lea, of Nebraska Territory, is catalogued without 

 description by Mr. Lea in Warren's Report on Nebraska. (Ex. 

 Doc. H. of Rep. 2d Sess. 35th Coog. 1858-9, Vol. II, part 3, p. 724.) 

 No description of any such species has been published. 



LimnsEci corrufjuta is quoted, without description, from Georgia, by Sow- 

 ERBY in Taukerville Coll. p. 42 (1825), Helix corrur/uta, Bodgin MS. 

 being given as synonyna. 



LimnsEa petitii, Beck, Newfoundland. No description. Index, p. 113. 



Omphiscola pugio, Beck (Index) is mentioned from Mexico, without de- 

 scription. 



Limnasa rtigosa, Valenciennes, appears an immature specimen of some 

 BuUmulus. I give below a copy of the original description, and au 

 outline of the original figure. According to Ferussac (Bull. Zool. 

 1835, p. 33), it is his Cochlogena dombeiana. See also Pfieffer, 

 Symb. Ill, 83. 



Limnsea rugosa, Valenciennes. — Shell ovate-conic, thin, white, 

 with an obsolete yellowish band ; whirls with 

 very numerous furrow-like wrinkles. pj„_ \\f). 



This species has six whirls, of which the 

 last is twice as long as the others ; ventri- 

 cose ; surface wrinkled by numerous longi- 

 tudinal ridges, which are not exactly parallel 

 to the edge of the right lip ; they are still 

 apparent on the fifth whirl, but on the fourth 

 are mere fine striae, while the three first 

 whirls have neither striae or folds. 



Aperture an elongated ellipse,.slightly nar- 

 rowed towards the base, its transverse di- 

 ameter being but one-half the longitudinal ; Limncea rugosa. 

 right lip thin and sharp. Within the traces 

 of the external ridges of the last whirl are visible. 



Columella thin, edge rounded, thrown back on the last whirl so 

 as to form a very small umbilicus. Color white, with transverse 

 reddish band, parallel to the suture, on the middle of the last whirl. 

 Length 14 lines. 



Eab. Mexico (Bonpland). (^^lenciennes.') 



Limnasa rugosa, Valenciennes, in Humb. & Bonp. Rec. d'Obs. II, 

 250, pi. Ivi, f. 5 (1833).— Haldeman, Mon. 15, pi, iii, f. 4, 5 

 (1841).— DeKay, N. Y. Moll. 75 (1843). 



Limnseus rugosus, KiJSTER, in Ch. ed. 2, 38, pi. viii, f. 3, 4, 



Limncea conoidea, Say, and L. lineata, Say, are mentioned by name by 

 H. & A. Adams, Gen. Rec. Moll. II, 253. I know of no descriptions 

 of such species by that author. 

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