ri \N\\M.I 



Gtaiu ATI; 



Kloll-Mted, >|i'l|V elevaled. \\lh-rl- rounded ; aperti 



-li'jhtly produced in front, onto li:- 



Ion-; impcrforale ; -urfacr marked l.y -piral ril.- \ in: 



( Jal)l). ( 'ivtaceon-. 



I'os>illy liclun-- in ( 'erit liiid;c. 



No rc.-cnt illustrated iimim-riph ..1 |-'..:iril:i- lias IM-.-U j.iil. 



Dr. Fisdicr printed a systematic Catalogue of th< 



\\itli svni HI \ in v, in "Journal <lr Conch vlioloirie, 11 f<ir l' s ii. 



I-AMM.V PLANAXID& 



Slu-11 oval conic, sj.irc elevated, without varie,- ; c(luniella ; 

 teiied, truncate anteriorly, lip rniunlcd. simple, notched in t: 

 ( )p{'rctilnni corncmis, suhspiral. 



Animal \\ith rather lon^ rostrum, sulmlate tenta<'le> and eyes 

 on swelling at their hu.-r. 



The JManaxida- have l*-en IIH.HO- ra|)hed ly Sowerhy. ii 

 choloiria Iconica, xx. 



Siiht'amily I'I.AN \\i\ i 



Siphon very short, foot simple. Shell spiralh 

 titi.n (IM. 40, ii- 



Sulifamily IJTK>I 



Animal (IM. 40, fiir. 7!).) No siplion, foot with three cirritorm 

 filaments, Operculigeroufi lol>e with two posterior tilam-nt>. henti- 

 tion ( IM. 40, fiir. 7d. i Shell minute, thin, smooth, plicar 

 spirally striate. 



Plaii'i. i-'nni . 



Genus PI.ANAXIS. Lamarck. 1822. 



Shell imperforate, oval-conic, solid, with epidermis, and elevated 

 -pire, usually spirally silicate : columella callous, tlattened, truncate 

 at hase, with a narrow sinus; interior of aperture ridded, base 

 notched. Operculum paucispiral, with a nearly terminal nuch 



Amphiluous, crawling on stones near the margins of jh.i,l< left ly 

 the retiriiiL r tide, or adhering to niaiiL'ro 1 . Almut titty 



are known, tropical or >ulitropical. Fossil ; pi I the 



Indies. P. SULCATTS, Horn. 



