250 DRYM^US, SOUTH AMERICAN. 



A moderately well-defined group of Drymceus with thin, slightly 

 expanded lip, variegated coloration of spots, blotches or imperfect 

 bands, and usually coarse striae or malleation. The species all occur 

 in southern and eastern Brazil. 



D. PAPYRACEUS (Mawe). PI. 51, figs. 1, 2, 3. 



Shell minutely perforate or imperforate, oblong-acute, thin, some- 

 what fragile. Opaque whitish, copiously streaked longitudinally 

 with black or blackish-brown, the streaks variegated with white longi- 

 tudinal lines, and spreading at intervals into blotches which form 

 three interrupted girdles; a sharply -defined umbilical patch always 

 irh ite. Surface shining, coarsely and irregularly rib-striate, with 

 slight traces of close spiral striation in places. Spire long-conic, 

 with straight lateral outlines, the apex rather obtuse. Whorls 6*, 

 moderately convex. 



Aperture ovate, vividly showing the external markings; peristome 

 thin, gently expanded along the outer and basal margins, outer lip 

 very equably arcuate, columella vertical and almost straight, slightly 

 folded above, pressed in at its junction with body-whorl, the edge 

 narrowly reflexed, leaving a slight umbilical chink or none. Alt- 

 29-32, diana. 14 ; length of aperture 15 mill. 



Brazil : Bahia (Paz) Rio Janeiro (Hensel, Paz, A. D. Brown 

 et al.~), Taguara (von Ihering). Argentina: Prov.Corrientes (Orb.) ; 

 San Pedro (Borelli). 



Helix papyracea MAWE, The Linnsean System of Conchology, p. 

 168, frontispiece, f. 7 (1823). Bulimus papyraceus GRAY in Ann. 

 of Philos. (n. ser.), ix, p. 414. WOOD, Index Test., suppl., pi. 8, f. 

 76. PFR., Mouogr., ii, p. 102 ; iii, p. 337 ; iv, 399 ; vi, 46 ; viii, 57. 

 -REEVE, C. Icon., pi. 39, f. 236. CUNNINGHAM, Trans. Linn. Soc. 

 Lond., xxvii, p. 483 (1870). PARA VICINI, Boll. Mus. Zool. ed 

 Anat. Comp. Torino, ix, no. 181, p. 6. HIDALGO, Journ. de 

 Conchyl., 1870, p. 57 ; Viaje al Pacifico, p. 108. Not ~B. papyraceus 

 DROUET, Moll. Terr, et Fluv. Guyane Francaise, p. 60. Bulimulus 

 papyraceus BECK, Index Moll., p. 65. CLESSIN, Malak.Bl. (u. F.), 

 x, p. 166 (1888). HEYNEMANN, Mai. Bl., xv, p. 110, pi. 5, f. 9 

 (jaw and teeth). MARTENS, Mai. BL, xv, p. 179 (1868). ANCEY, 

 Boll. Mus. Zool. ed Anat. Comp. Univ. Torino, xii, no. 309, p. 5. 

 Otostonms (Mormus) papyraceus SEMPER, Reisen in Archip. Phil., 

 LandmolL, iii, p. 156, pi. 17, f. 7 (genitalia). Mormus papyraceus 

 DOERING, Bol. Acad. Nac. de Cien. Rep. Argent., iii, p. 77 (1879). 



