45 DRYM^EUS, MEXICO AND CENTRAL AMERICA. 



O.femstrellus; but in his other work it stands alone for the whole 

 species, owing possibly to the unintentional omission of the locality 

 Tenango. Neither Fischer and Crosse nor Strebel have noticed this. 



D. JONASI (Pfeiffer). PI. 10, figs. 64, 68, 69, 70, 71. 



Shell perforate, oblong-conic, rather thin but moderately solid ; 

 shining, white or buff, with numerous narrow longitudinal corneous or 

 corneous -brown streaks, occupyiny the sulci between prominent, unequal 

 wrinkles or folds of the surface; rather slight and superficial spiral 

 striae appearing under the lens. Spire long, the apex obtuse, with 

 typical Drym&us sculpture, whorls nearly 6, moderately convex, the 

 last revolution of the suture deeply impresses 



Aperture long-ovate, colored within like the outside; peristome 

 thin, acute, the outer lip moderately expanded in large individuals; 

 columellar margin reflexed for a short distance above. 



Alt. 26, diam. 11, length of aperture 121 m iH. 



Alt. 24^, diam. 11, length of aperture 12 mill. 



Central Guatemala : Environs of the city of Guatemala (Salle, Stoll); 

 Antigua and Amatitlan (Stoll) ; Duenas (Champion). [? N. Guat- 

 emala: Vera Paz. (by error Vera Cruz) (Delattre) ; Coban 

 (Salvin)]. Costa Rica (van Patten in Berlin Museum). 



Bulimus jonasi PFR. in Philippi, Abbild. neuer Conch, ii, p. 

 125, pi. 5, fig. 4 (1846) ; Monogr. Helic. Vivent. ii, p. 107 ; in 

 Martini & Chemnitz, Syst. Conch. -Cab., ed. 2, Bulimus, p. 168, 



pi. 50, figs. 11, 12 DESHAYES, in Ferussac, Hist. Nat. Moll. Terr. 



ii, 2, p. 183, pi. 150, figs. 17, 18 REEVE, Conch. Icon, v, 



Bulimus, pi. 55, fig. 363. Bulimus (Leiostracus) jonasi PFR. in 



Malak. Blatt. ii, p. 153 (1855) Otostomus (Leiostracus) jonasi H. 



& A. ADAMS, Gen. Reo. Moll, ii, p. 151 Bulimulus (Morrnus) 

 jonasi MART, in Albers, Die Helic. ed. 2, p. 216 BINNEY, Am. 

 Journ. Conch, vii, p. 182 (1872) (jaw, radula). 



Bulimulus (Scutalus) jonasi FISCH. & CROSSE, Miss. Scient. 

 Mex., Mollusca, i, p. 525, pi. 23, figs. 7, 7a. Bulimulus jonasi 

 MART, in P. Z. S. 1875, p. 648; Jahrb. d. M. Ges. iii, p. 257. 

 O. STOLL, Guatem. Reisen, p. 53 (1886). Otostomus (Mormus) 

 jonasi MART, in Conch. Mittheil. ii, p. 193; Biol. Centr. Amer., 



Moll., p. 212, pi. 13, f. 11-13 Mormus jonasi W. G. BINNEY, 



Ann. N. Y. Acad. Sci. iii, p. 123 (jaw and teeth). 



D. jonasi, like the allied ghiesbreghti, varies a good deal in the 



