U TloKIMI' 



n LACU> M:I I* ( '"iirad. 1 & 



-l:il MI- -iil>L r lol>o-e. thin, with delicate, clo-e -piral 

 line-; aperture entire, an-ulated posteriorly. mar-ins disunited, 



coiumella flattened, with a Long groove descending from the uml>ili- 

 Stafei and Frana . L. AI.AKAMI.NM-. Whit- 

 . Conch., t. 89, t 



OB II M..,< DJTCHA, Dall. 1886. 



Depress*-'!, heliciform, few whorled, thin, with a .-troiii: rjiiU-r- 

 jni. lij> thin, with narrow ivfh-xrd niarLfin in the adult, continuous 

 with the thin, -harp, unrefleeted arcuate coluniella ; unil>ilicated. 



L. KI:I I.KXA, Dall. . I /"./'/. 



It i- L,irn,,,ll,t. I)all i noi I)e>ln. and L<i<-n,,,-i. Dall - not 

 1 



n MM, LLOMPHALU8, Hrusina. 1- S 71. 



Shell naticitonn, with short spire, normal apex, and n-unded 

 uhorls, thin, minute, with a wide, plicate umbilicus. Operculum 



L. A/ONA, .Bnisina. Mediterranean Sea. 



The s|.eei t - oi' tliis ^nuip were iirst described under Fosfmrn*. 

 tr-'iu which they dill'er in apex, sculpture and operculum. Fischer 

 :di-i> Megalonyfhaku a ineiuln-r f the family Adeorhiida-. 



Section SrHfons, A. Ad., 1863. 



Shell compressed, elo!iL r atelv ovate, auriform; spire short, acute; 



whorl- flattened, the la.-t -olute; aperture ohloiu:, narrow hehind, 



jin continuou>, acui.-; undilieu- patuhius, its margin annulate. 



L. l.AX \ TA. A. Ad. J'l/xttl. 



Section OlTHKA, A. Ad.. Lfi 



Sln-11 -haped like Lnrtmn, luit without epidermis (?); apex trun- 

 cated or tlaltrned, umhilicu- defined liy a ridLfe. 



Tentacl.- eiliated. L. ; 1 \ I I.I. \. .Ictl'ivv-. Km-nfi* . J<i/tn. 

 Held, Jeffrey-. l>7u. i- a synonym. 



Silh'jenil- L \. I \ I I.i. \. De-h, 1 s f>l. 



Shell oval, thin. |M-llu-id. -hilling, apex ol.tu.-e; aperture large, 

 dilati-d. with thin, expanded m.ir_ r in: coluniella narrow, thin, con- 

 cave. divided l>y a narrow channel, scarcely perforate at the base. 



L LI i-uiasA, Deah. (Stn; :eh.. t . i;., t'. :;;.) 



I'ari- i.a-in. 



