LIMN^A.— Plate I. 



ture in length ; whorls four, rather short, rounded ; 

 last whorl shortly subcylindrical ; aperture oblong- 

 subquadrate, anteriorly subtruncated ; inner lip 

 rather thick, anteriorly rather straight, columellar 

 fold not prominent. 



MuLLEU. Pfeiffer, Syst. Anond., pi. -1, f. 27. 



Limnaea fossaria, Turton ? 



Limncea minuta, Draparnaud .' 

 turrita, Sowerby ? 



Species 4. (Fig- a, h, Mus. Brit.) 



Li.\in.«:a stagnalis. Lim. testa elegantn- pyramidatd, 

 corneo-fulvd ; spin! elevatd, acuminatd, attenuatd, 

 aperturam lonijitudine paulo superanti ; anfractibus 

 attenuatis, ohliquis, posttce declivibus, medio leviter 

 angulatis ; iiltimo anfvactu inflato ; apertvrd magna 

 suhqnadratd, labia exlemo ad medium simmlim 

 producto ; labia intemo subexpansa, plica columel- 

 lavi prominenti, spiraliter tortud, recurvd. 



The .stagnant Limnjea. Shell elegantly pyramidal, 

 horny-fulvous ; spire elevated, acuminated, attenu- 

 ated, a little longer than the aperture; whorls 

 attenuated, oblique, sloped posteriorly, slightly 

 angular in the middle ; last whorl inflated ; 

 aperture large, subquadrate, outer lip sinuously 

 produced in the middle ; inner lip somewhat ex- 

 panded, columellar fold prominent, spirally tor- 

 tuous, recurved. 



LiNN^us. Systema Natura;. 



Liiiina'a strii/nlu, Parreys. 



Ln„,„-ni !•;,,,/,>,■'! Muhlfelds. 



Jlal). (iroat I Iritain, and Europe generally. 



Species 5. (Mus. Brit.) 



Li.MX.EA PALUSTitis. Liiii. testd fitmoso-comed, c?-assi- 

 mculi'i, jnframidatd ; spird clevatd, aperturam langi- 

 tiidiii, sn/ii niiili ; a iifract ibus CBqiialiter cresceiitihus, 

 paiili'i i-fiiir, .lis : tiUliiii, iiiifractu spiraliter rugatis ; 

 upciiiiiv bri'i-iiist-n/'i, aiitici' latiusculd ; plica colu- 

 mellari conqncud, tortud, antice subrecurvd. 



The marsh LiMNiEA. Shell smoky-horn, rather thick, 

 pyramidal ; spire elevated, exceeding the aperture 

 in length; whorls equally increasing, a little 

 convex ; last whorl spirally wrinkled ; aperture 

 rather short, anteriorly rather broad ; columellar 

 plait conspicuous, tortuous, anteriorly curved a 

 little backwards. 



|)i;ai-ai;xaui). Mollusques de France, pi. 2, f. 40-42. 



Limncea coi-nea, Valenciennes ? 

 Liiiina'a fragilis, Linn. ? 



Limncea speciosa, ? 



It is not known to which of several species the 

 L. fragilis of Linnaeus belonged. 



Species C. (Mus. Brit.) 



Limn^a umbrosa. Lim. testd frimoso-corncd , solidius- 

 culd, cylindraceo - subpyramidaid, spird elevatd, 

 multo aperturam longitudine superanti ; anfractibus 

 quinque, quarum tribus apicalibus 2'>arvis, acumi- 

 natis, penultimo ultimoque elongatis, subcylindraceis, 

 ultimo spiraliter rugato, supi-a aperturam elevato ; 

 aperturd lata, plied cohmellari elevatd, ccmspicud, 

 tortud, retrorsim arciiatd. 



The shadowy Limn^a. Shell smoky-horn, rather 

 solid, cylindrically subpyramidal, spire elevated, 

 much longer than the aperture ; whorls five, of 

 which the three apical ones are small, acuminated, 

 the penultimate and last long, subcylindrical, the 

 last spirally wrinkled, raised above the aperture ; 

 aperture broad, columellar fold elevated, conspi- 

 cuous, tortuous, arched backwards. 



Say. American Conchology, Limnsea, fig. 3. 



Limncea ohscura, Zeigler. 



Hab. N. America. 



In this species, the two last whorls are elongated and 



full, giving a cylindrical appearance to the figure. L. 



reflexa, Say, is comparatively long and narrow, but 



with the whorls more equally increasing. L. elodes 



is more like our L. palustris, but more oblique, with the 



mouth and last whorl more oval. 



Species 7. (Fig. n, b, c, Mus. Brit.) 



LiMN^A PKi'.EGRA ? Lim. tcstd subovutd, coi-ncd, sjjird 

 brcviusculd, acuminata, anfi-actibus tribus, plerum- 

 que castaneis ; ultimo anfractu ovato ; aperturd 

 magna, latd, spiram longitudine superanti ; plica 

 columellari elevatd, rectiusculd. 



The WANDERING LiMNiEA. Shell subovate, horny, 

 spire rather short, acuminated, whorls three, 

 generally chestnut ; last whorl ovate ; aperture 

 large, broad, exceeding the spire in length ; 

 columellar fold elevated, rather straiglit. 



Ferku.ssac. 



LimiHTa liniata, ? 



LiiniKta glacialis, ? 



