11 PKYM.r.lS. MI.M'O AM> iT.NTKAI. AMr.lMi'A. 



Alt. 27. diam. 12, length of aperture II 1 , mill. 



castos l'i ]:., V. X. S. is-li;. ,,. 112 : Mono-r. Helic. Vi- 

 vent. ii, p. 17. l\i:i:\ K, Condi. Icon. \. /,'n/i/t/t/s, pi. -\~>, \\\:. 282. 

 TAT I-:, Am. Joiirn. Conch. v, ]>]>. l.~>2, l.'iC, (ls7<>). 

 < /., insfrin-iis) ft/slits I'l i;. in Malak. l>latt. ii, p. 1/J." (lS."i.~>). 

 fiiiinis (Leiostracus) ciintim, II. ^ A. AHA.M-. (ii-n. Kcc. Moll. ii. p. 

 !.")!. JiiiUniiiJux castus v. .M \i;r., in P. /. S. I,s7."i. p. C^s. //////. 

 nn/[>ts (Drymteus} fisfits, FI-CII. \ ('KH--I-:. Mi-s. Scicnt. Mrx.. 

 Mollnsca, i, p. 4s."), pi. -J4, lij:s. 11. 11 ^-'/. (Mos/miins ctintiis v. 

 MARTENS, I'.iol. Crntr. Am. r.. p. I'm;, p]. 12, f. 10-21. 



I't'culiai-ly graceful in contour, and \\liilr allied to tin- two -pi-eies 

 preceding, yt t a<ily dislin<i;uis!ied liy its slender Conn, smooth, not 

 malleated surface, line spiral striatioii. and purity of colorinir. 



Pfeiffc-r's types wei-e wliitisli, with a lilnsli toward the I'.-i-e and 

 aperture, the peri^tome I'o-eate. J)i'. von Martens < lli-rs the 1'ollow- 



arrangement of varieties and variation-. 



A. typiciis ; Small, length l'.-2.'), diam. 1 1, aperture ld-12-.V mill. 

 a: unicolori'd, wliitc, pcristome, more or h -- ro-eatc. 

 b : irregularly streaked with In-own (Fi.si. -12). 

 c: Three blackish-brown bands, either interrupted ( Keeve, 



loc. cil. fi'j. 2S2) or continons fliir. 43, 44). 

 Central America : probably \ <r 1\>; (Delatfrev&T.d). A T . (,'mit- 



: Cohan (Morelet. Salvin : varr. a, b, c); 7'nim//iii (Saru). 

 I',. .n//i//iofi'in-iis : \:\vj.'-, a little more inflated. Itnulh _'.", diam. 

 1 1. apert. 1 ") mill.); white, ap".\ and peri-tome \ ellowish ( Fi^. .V_'. ."i."i ). 

 N. GiKiti'iiiulii : Suli'i. in a tribntai-y \alley of the Ki\,r 1'ohichic, 

 at an elevation of.'ixnn feet nbove the >ea (Champion'. 



('. porrectus: Kloipjaled, mon- >lender, length .'Id-.".."), diam. 1 I 



I;'), apert. l> !! mill.) 

 a. Uniform white, the columella only pink (I-'it:-. 17. I'.i), (/>////- 



},,ii/ns ,-,i.^t/is \ar. \\. I-'i-idi. iV Cro>se. loc. cit. liir. 11 h.) 



/i. Two or three purple-brown bands, tin- api'Mim- roseate ( li^s. 

 l.'i, 1C,). ( liiilin, ii/ns rns/ns \:ir. ; . Fi>ch.i^ Ci-o-.-e, loc. cil. lii:. 1 1 r,d). 



c. Streaked, colmnella only jo-,air ( l-'i-j. IS.) 



17. Guatemala: <',,/,,/// ,,r 7'<i///<r/in (Morelet or Sari:.: varr. <t, />); 

 Vera Paz (Stoll : varr. l>. 



"The three varietie.-. A. \\, C, appear to be di-tinct at lirst siht, 



