i i i i< ' : ; 



mi CY< Ltt in M. \ ' 



1'yramidal ; aperture circular ; lal.nim , 



toned, Mibangular al thei.a-e; periphery MIJ 



A doubtful little tertiary -h. 

 fluviatile. 



Qua LAMN A. l 



Slirll turl>inated <>r u'lohular, thin. 



:i pern in- Bemilunar, columella tint i en. <l. \\ it i, 



hind it endim: in the nnil.ili.-n-. lip shi iliirn 



paucispiral ( tiir. 77. i 



Animal i IM. 4(1, fiir. 7i.) I' -InTi, tcnlad 



like, with eye- nearly M ile at their .niter base, 

 front, attenuated behind, OpercullgerOtU lohe \\ilh a Ion- til . 

 on either >ide. Dentition f IM. 4(1. ! 



Spawn verinit'onn, thick, semieirenlar. Kamr- lo\\ | 

 fatlniiiis. The Laeniue teed iijton M-a weed. Mini the aiiin 

 on the eolor <>f its food-plant. 



h . ( .ray. 1 > 17. i- a -yiioiiyin. 



L. I'Ai.i.iDi'i.A, I>;i('o-ta. I-'. il. tn-tiar\ ; k 



species. 



n LAI IN \ ' -niMi stri- 

 L. IM i i :<M DB, 



Section I-j'iii;i:iA. L.-a.-h.yjiA (ii'ay. I ^ \~ . 



Shell thin, usually with spiral 

 vatcd : inner lip thin, sharp, umbilical ti-- un- UoMUT I. 



TurtoD. 



ion M i DOB] \. Leach, 12, 



( 'oiiical. -olid, with rh-vatcd -: riorly 



ivtl. ct.'d : inner lip thick. Mattnird. undiilical li-im- obsolete. 



L. < i. >. !' >B, .M.-iit. 



m Ih I:-M i \. M.-IH-. : 



i in \\hich this ^n>iij) \\a> puhli-hc.l i- inacoenil 

 me ; I am then-Hire mialde to -iv the dingllOsU. 



I . ^l i hi i 1.1:1: VM.\. > ' 



