MI* i:"M i 

 is white, tran-lueent, tnwr.-rd liy three well <!< lined narrow Mark 



linet, which are equally ipaoed ami a little obliquely tranfrerM. At 



ri:ht angles with the>e are about 10 I>iiL:itudin;i v and ir- 



ivuMilarly waved lines of tlie same color. Length 5, Invadth 3 lines. 



Agagna, Island of dnmn. M<trni>i/i>' </r< int : / 



s liricli Is. (Garrett) ; Munrifin^ ( Licnanl ; ; /.' I)h.) and 



FoiKjtotg , M 



llntltrn r/nnmt-mtiA (7>/AV Fi'm^sar, on |)latc) (^. tt (r., Voy. 

 I'Urauie et la Physicieune, Xo,,l., p. 4'J.;, pi. r.U, f. 10, 11, 12 (1824). 

 Hydathiu i/iUDiirnsi* Psi:., Amer. Jour. Conch., iv, p. 1-TJ. 

 MAUTENS& LANGK., Donum Bism., p. ">!>. llnlht .^n^ta GAR- 

 RETT, Proc. Cal. Acad. Sci., i, 1857, p. 103. / /itd/inu nndn/nta 

 Brug., FERUSSAC, Tab. Syst., p. xxx (no description). I>uUiinil<i 

 luidata Quoy, GRAY, Figs. Moll. Anim., iv, p. 96, 1850 ; i, pi. 59, f. 

 6 (copied from Quoy). Bulla ferussaci DESH. in Lam., An. s. V rt. 

 vii, p. 57. CATLOW & RVE., Conch. NomencL, p. 113, 184"). 



Very similar to the West Indian M. undata, but slenderer, alt. 9, 

 diam. 6 mill., and the markings black, not red ; spiral striation 

 very weak, generally distinct only on the base. 



M. EXIMIA Deshayes. PL 59, figs. 18, 19. 



Shell ovate-oblong, subcylindrical, thin, pellucid, whitish-roseate, 

 peculiarly ornamented with blackish-brown longitudinal wavy hair 

 lines, and two distant transverse interrupted lines; spire very short, 

 obtuse ; whorls 3, narrow, joined by a linear suture, the last whorl 

 large, smooth in the middle, obsoletely striated in front; aperture 

 large, dilated in the front part, narrower and subemarginate be- 

 hind ; columella thin, white, deeply arcuate. Alt. 13, greater 

 diam. 11, lesser 7 mill. (D/t.). 



RfafttOfl . M-tnritiu8. 



Bulla eximia DH., Moll. Ri'im., p. 55, pi. 7, f. 23, 24 (1863). 

 LIENARD, Cat. Faun. Mai. Maurice, p. 53. Hydatina eximin 

 MARTENS, Mobius' Reise n.Maurit., p. .'>01. 



This form is probably a variety or synonym of guamenti*. 

 Family RING1CULID& Meek. 



Ringiculince MEEK, Amer. Journ. Sci., 2, xxxv, pp. 87, 92, (1862). 

 Ringiculidce MEEK, Check-list Inv. Foss. N. A. Cret., pp. !'.. 



