L I M N ^ A. 



Fig. b. A peculiar variety of Liiancea auricularia ; 

 vide Plate I. 



Species 8. (Fig. o, h, Miis. Brit.) 



LniNjEA lirvoLHTA. Liin. testd ovato-suhcylindricd, t'n- 

 vohctd, coi-neo-rulescenti, aperturd ohlmigd, antke 

 amplissimd, labio externo postice suprd, spiram 

 elevato, cohimelld uniplicald; spird concavd, an- 

 fractihus siihcwialis. 



The involute Limn.ea. Shell ovately-siibcyliiulrical, 

 involute reddish horn, aperture oblong, very lull 

 in front, outer lip elevated posteriorly above the 

 spire, columella single-plaited; spire concave, 

 with the whorls nearly hidden. 



Har\-et (AmphipepL-ca) ? 



Hah. Killarney, Ireland, &c. 



This species is the tj'pe of a group of Limna.>ada; 

 which has been separated under the generic appellation 

 Amj^hipeplcea, having hollow or partly hidden spires. 

 The gradation through L. fjlutlnosa, L. Cumingii, &c., 

 to others with slightly raised spires is gradual. 



Species 0. (Fig. a, h, Mus. Brit.) 



LniN^A GLUTiNOSA. Lwi. testd suh<jl()hosd, tenuis- 

 simd, post cohcmellam subumbilicatd ; aperturd 

 maximd, columelld imiplicatd, tortud, arcuatd, 

 labio interna tenuissime expanso ; ultimo anfractu 

 parvo, spird subinvolutd, apice vix producto. 



The glutinous Limn^a. Shell subglobose, very thin, 

 subumbilicated behind the columella; aperture 

 very large, columella single-plaited, tortuous, 

 arched, inner hp very thinly spread, last whorl 

 small, spire nearly involute, with scarcely pro- 

 duced apex. 



Draparnand. Mich. Corapl. Drap., p. 38, PL 10, 

 f. 13, 14. 



Hab. Germany, Great Britain. 



In the second .species of AmpldiKphm the apex is a 

 little raised. 



Species 10. (Mus. Brit.) 



Limn,ea patvla. Lim. testd ehmtjxtd, tnnd, jia/lidd, 

 ovatd, 2>ostice attemiatd, anfractu ultimo vblotiijo, 

 angiisto, columelld tonuiler unijilicatd, Inhioiiitcnto 

 tenuissime expanso ; aperturd magnd ; labio externo 

 postice subrvlimdo, medio paulo si iiuatim producto ; 

 spird elonijatd, attemiatd, anfractibus tribus pyra- 

 midalihus 



The patulous Limn.ea. Shell elongated, thin, pale, 

 ovate, posteriorly attenuated, with the last whorl 

 oblong narrow; columella thinly uniplicate, inner 

 lip very thinly expanded ; aperture large ; outer 

 lij) rather rounded posteriorly, a little sinuously 

 produced in the middle; spire elongated, at- 

 tenuated, with three pyramidal whorls. 



Tro.schel. ? 



TIab. River Ganges. 



Not unlike Limncea rrifescens. Gray, but less pyra- 

 midal, having the upper part of the last whorl much 

 more full and rounded. 



LlM.\.EA MEOASTOM 

 loii,,;tnd;„aldc 



Species 11. (Mus. Brit.) 



Liia. testd subovaid, soUdiusculd, 

 ru(/is l(Bvigalis hand profnadis 



'I'" 



ide subjlavido glabra indiUd, inths 

 pvrpiiiiM ; labio inferno antice uniplicato, postice 

 alba ; subsolido ; anfractu ultimo ventricoso ; spird 

 breviiisculd, anfrcKtibus prope suturam subangii- 

 latis. 



The LAitGE-MOUTHED LiMNiEA. Shell subovate, rather 

 solid, ridged longitudinally with .smooth, not deep 

 wrinkles, covered with a rather yellow glabrous 

 epidermis, purple within ; inner lip with one an- 

 terior fold, po.steriorly white, rather solid ; last 

 whorl ventricose ; spire rather short, whorls rather 

 angular near the suture. 



Say. Haldeman's Journal, PI. 3, f. 1. 



Limiuea columella. Say. 



Hub. New York. 



March, 1.S72. 



