L I M N ^ A. 



Plate III. 



Species 14. (Fig. a, h, c. JIus. Brit.) 



LiMN.aL^ RUFESCENS. Lim. testd eIongnto-2»jrarn,idatd, 

 tenui, pallide corned, vcl rufescenti vel purpuras- 

 centi ; spird allenuatd, acuminald, anfradibus 

 dongalis, pyramidatU, ultimo ohlongo, antice suh- 

 expanso ; columelld uniplicatd, arcuaid, labia in- 

 terno tenui, aiigusto. 



The eeddish Limn^a. Shell elongate-pyramidal, thin, 

 pale horny or reddish or pirrplish ; spire attenu- 

 ated, acviminated, whorls elongated, pyramidal, 

 the last oblong, anteriorly subexpanded ; colu- 

 mella uniplioated, arched, inner lip thin, narrow. 



Grat. Reeve, Conch. Sy.st., pi. 191, f. 2. 



Ilab. India. 



Species 15. (Miis. Brit.) 



LiiiNiELi OVATA. Lim. tcstd ovald, rentricosd, opacd, 

 corned, rectiusculd ; sjdrd brevi, acuid ; anfractn 

 penuUimo rotunda, ultimo magna, past calumellam 

 concavo, aperturd ovatd, laid, lahio interna solidi- 

 ilsculo, angitsta, plied, coliimcllari crassiusculd 

 rectiusculd. 



The ovate LursiEA. Shell ovate, ventricose, oparpie, 

 liorny, rather straight ; spire short, acute ; jienul- 

 timate whorl rounded, last whorl large, concave 

 behind the columella, aperture ovate, broad, inrnT 

 lip rather solid, narrow, columella fold rather 

 thick, rather straight. 



Desparnadd. Moll., pi. 2, f. 30, SI. 



Hab. Europe. 



It must still be an open question whether such species 



aa Limnaa ovata, acuta, intermedia, and pereger 



should or should not be united under the latter name. 



The writer does not decide this question, but only 



attempts to show the characteristics of each. 



Species IC. (Mu3. Brit.) 

 LiMN^A iN'TEKMErnA. Lim. t( std mhoratd, rentricosd, 

 ahliqud, corned, tsubopacd ; spird briciiisculd. 



anfractu pemdtimo injlato, ultimo oblique expanse, 

 post columellam concavo, ajicrturd oblique snhovaid. 

 lata, plica colurnellari elevatd, solidd, subtoriiwsd. 



The indeterminate Li.mx.s;a. Shell siibovatc, ventri- 

 cose, oblique, horny subopaque ; spire rather 

 short, penultimate whorl inflated, last whoxl 

 obliquely expanded, concave behind the columella, 

 aperture obliquely subovatc, broad, columellar 

 fold elevated, solid, a little tortuous. 



Ferrussac. IMich. Compl. Descrip., pi. 10. pp. 17, 18. 



llab. France. 



If this be a distinct species, it may be considered 



intermediate in form between Liinncta pereger and L. 



auricularia. 



Species 17. (Mus. Brit.) 



LiMN^A FUSCA. Lim. testd j^yramidatd, angustd, opacd, 

 pallide lactea-s^ibjjurptired ; spird elongald pyra- 

 midatd, anfractibus quatuor compressis, fusca- 

 rufescentihus ; apice acuminato ; aperturd jHirvd, 

 inlus castaned ; plied calumellari brevi, rectiusculd. 



The brown Limn.ea. Shell pyramidal, narrow, opaque, 

 pale milky-purplish ; spire elongate-pyramidal, 

 with four compressed reddish-brown whorls, 

 apex acuminated ; aperture small, chestnut within ; 

 columellar fold short, rather straight. 



Pfeiffer. Lund and Freshw., vol. ii. pi. -1, fig. 25. 



Hab. Dalmatia. 



Not unlike the British L. palustris, but with straight- 

 sided whorls, and dark chestnut colour in the mouth. 



Species 18. (Mus. Brit.) 



LisiN^A riNGuis. Lim. testd anguste ovatd, rectiusculd, 

 subsalmoned ; spird breviiiseidd, obtusiiisculd, an- 

 fractibus jMrvis, fusca-rubescentibus; idtimo magno; 

 aperturd mediocri, ovatd, pilicd calumellari sub- 

 tortuosd. 



The fat Lims^ea. Shell narrowly ovate, rather 

 straight, of a slightly salmon colour ; spire rather 



March, 1872. 



