LIMN.EA. 3£ 



Inhabits Lakes Erie and Superior. Total length j ,%' of the aperture H 



of an inch. 



This shell is remarkable for its narrow and elongated form, Fig. 48. 

 and for the consequent very oblique revolution of the whirls. 

 When viewed in profile it has a slightly reflected appearance. 

 It was kindly sent to me for examination by my friends 

 Messrs. S. B. Collins and D. H. Barnes, of New York, and was 

 found in Lake Superior by Mr. Schoolcraft. I recollect to have 

 seen a specimen two or three years since brought from Lake 

 Erie by James Griffiths. It is proportionally longer than 

 el 071 gat us. (Sa_y.) 



Limnens reflexus, Say, Journ. Acad. Nat. Sc. Phil. II, 167 

 (1821) ; Am. Conch. IV, pi. xxxi, f. 2 (1832) ; Binney's 

 ed. 65, 188, pi. xxxi, f. 2; ed. Chenu, 44, pi. vii, f. 4. 

 — KiJSTER in Ch. ed. 2, 41, pi. vii, f. 11, 12. 

 Limnsa reflexa, Haldeman, Mon. 26, pi. viii (1842). — DeKay, N. Y. 



MoU. 71, pLiv,f. 65, 72(1843). 

 Limneus elongatvs, Say, Journ. Ac. Nat. Sc. Phil. II, 167 (1821) ; Long's 



Exp. II, 263 ; Binney's ed. 65, 130 ; ed. Chend, 43, pi. vii, f. 5. 

 Limnexis umbrosus, Say, Am. Conch. IV, pi. xxxi, f. 2 (1832) ; Binney's 

 ed. 187, pi. xxxi, f. 2.— Haldeman, Mon. 24, pi. vii (1842).— DeKay, 

 N. Y. Moll. 68, pi. iv, f. 76 (1843).— Kuster in Ch. ed. 2, 41, pi. 

 vii, f. 13-16. 

 Limiura exiUs, Lea, Tr. Am. Phil. Soc. V, 114, pi. xix, f. 82 (1837) ; Obs. 



I. 226.— KiJSTEK (^LimnsEus) in Ch. ed. 2, 40, pi. vii, f. 9. 

 Limnaus palustris, var. distorius, Rossmassler (1835), Icon. I, 97, pi. ii, 



f. 52. 

 Lhnnophiisa reflexa, Chenu, Man. de Conch. II, 480, f. 3544. 



This species has been observed through the northern tier of 

 States, from New York to the Pacific, and in Canada. It ex- 

 tends more to the southward in the western portions of its area, 

 having been found in Kansas and Utah, and in the Columbia and 

 Sacramento Rivers. 



I have given above a copy of Mr. Say's description of this 

 species, and a fac-simile (Fig. 48) of the outline of one of his 

 figures. It is a well-known shell, found in great numbers, and 

 common in collections. It is subject to much variation, as shown 

 by the large suite in the collection. Three forms have been de- 

 scribed as distinct species, and are treated at length below. It 

 is also readily confounded with Limnsea fragilis, so as indeed 

 almost to warrant the conclusion of Forbes & Hanley that " the 



Probably 1 j^^ inch. 



