APPENDIX, BULIMULUS. 319 



Subgenus BULIMULUS s. sir. 

 B. MENDOZANUS Strobe! (p. 71). 



The generic position of this species is not known, the apex still 

 being unexamined. 



Yar. BOXAERENSIS Doering. 



Differs from var. azulensis (from the Sierra Baya) in having the 

 spire lengthened, less ventricose, the suture deeper, aperture smaller, 

 and the color olivaceous-green. (Doering). 



Alt. 20, diam. 10; alt. of aperture 12, width 7 mill. 



Alt. 22, diam. 11 ; alt, of aperture 12*, width 7 mill. 



Alt. 25, diam. 12; alt. of aperture 13, width 8 mill. 



Alt. 26, diam. 13 ; alt. of aperture 14, width 8 mill. 



Alt. 30, diam. 15 ; alt. of aperture 15, width 10 mill. 



Escalones de las Aguilas, Sierra del Tandil (Holmberg). 



Eudioptus mcndozanus Strob., var. bonaerensis DOER., Actes de 

 la Academia Nacional de Ciencias en Cordoba, v, pt. 2, p. Ill, pi. 

 2, f. 1 (1884). 



Var. AZULEXSIS Doering. PI. 26, figs. 79, 80. 



The color is dark amber-olivaceous, with longitudinal irregular 

 streaks of a somewhat darker shade. The shell is very delicate and 

 somewhat flexible, with many plicae or strong wrinkles, and with a 

 rather glossy surface. Inside it is smooth and somewhat nacreous. 

 (Doer.}. 



Alt. 24, diam. 12 ; alt. of aperture 15, width 8 mill. 



Alt. 25, diam. 14* ; alt. of aperture 16, width 9 mill. 



Alt. 27, diam. 14* ; alt. of aperture 17, width 9 mill. 



Alt. 28, diam. 15; alt. of aperture 16-V, width 10 J mill. 



Alt. 29, diam. 16 ; alt. of aperture 17, width 10 mill. 



Sierra de Sotoya to the Sierra de Olavarria, Rio Negro region, 

 Argentina. 



Eudioptus mendozanus Strob. var., DOER., in Roca's Informe 

 Oficial de la Com is. Cient. Exped. al Rio Negro, i, Zoologia, p. 62, 

 pi. 1, f. 1, la (1881). Probably E. mendozanus var. azulensis DOER., 

 1884, see below. 



Jaw with 12 thick ribs, the terminal ones dilated, intermediates 

 unequal and comparatively narrow, the central ribs a little narrower 

 and conical. The species is allied, according to Doering to D. 

 tortomnus (Vol. X, p. 192), B. cordillerce Strob, (p. 191) and B. mon- 



