LIMN^A. 



25 



It is useless, therefore, to refer here to the thirty synonyms quoted 

 by Hermanusen.^ 



As a subgeneric name for the typical Limneea, Lymnus, Montf. 

 has priority — Siagnicola, Leach, being a synonym. 



Fig. 28. 



Liimnsea stagnalis, Lin. — Shell elongated-ventricose ; volutions 

 six ; spire regularly attenuated to an acute tip, rather shorter than the 

 aperture ; body whirl dilated, proportionally large ; 

 aperture ample ; columella with the sinus of the 

 fold profound, callus perfectly appressed upon 

 the shell to the base. 



Inhabits Lake Superior. 



This shell exhibits very much the appearance 

 of L. siagnalis, but its body whirl is less propor- 

 tionally dilated. The callus of the labrum is 

 perfectly appressed to the surface of the whirl 

 even to the base, exactly as in stagnalis. I have 

 seen but a single weathered and broken specimen, 

 which was sent me for examination by my friends 

 Messrs. Collins and Barnes, of New York. It 

 was found in Lake Superior, by Mr. Schoolcraft. 

 Since writing the above, Mr. Jessup presented me 

 with several specimens, which he collected in 

 Canandaigua and Cayuga Lakes. {Say. L. 

 appressa.) Limneea appressa, Say. 



Limnxa jugular is, Say, Nich. Encycl. 1817,1818,1819; ed. Binney, p. 

 46.— Haldeman, Mon. 16, pi. iv (1841).— DeKay, N. Y. Moll. 74, 

 pi. V, f. 81 (1843).— KiJSTER, Ch. ed. 2, p. 3, pi. i, f. 7. 



Limnsea appressa, Say, Journ. Acad. Nat. Sc. II, 168 (1818) ; Binney's 

 ed. 66.— Haldeman, Mon. 18, pi. v (1842).— Adams, Shells of Ver- 

 mont, 153 (pamphlet 3), (1842).— DeKay, N. Y. Moll. 74 (1843).— 

 KusTEK, Ch. ed. 2, 4, pi. 1, f. 8-9. 



Limnaea stagnalis, Linn^eds, &c. — Sheppard (1829), Tr. Lit. Hist. Soc. 

 Quebec, I, 196. — Kirtland, Am. Journ. Sc. [i], XXXI, 35, f. 10 ; 

 Ohio Report, 200.— Anon. Can. Nat. II, 196, f. 1, 2, 1857. 



Limneea speciosa, Zieglek of Rossmassler, Icon. pt. 2, p. 96 ; pi. ii, f. 50 

 (1835). 



This species ranges from Vermont, through the northern tier 



' H. & A. Adams suggest the use of Klein's name Auricula, he being 

 the first to notice and describe the genus. I protest against the use of his 

 names in preference to the well-established names of authors who truly 

 understood and followed the Linnsean system of generic nomenclature. 

 (See Sill. Am. Journ. [2J, XXXV, 429.) 



