52 ODONTOSTOMUS. 



yellow with a median chestnut band ; the opaque streaks more or 

 less split into lines, sometimes forming a mesh or reticulation. Spire 

 long conic with slightly convex outlines. Whorls about 8, the 

 earlier ones roseate ; last whorl tapering below. Aperture oblong, 

 pale within, but having a large triangular brown blotch within the 

 outer lip ; peristome rose-tinted or white, broadly expanded, tooth- 

 less ; columella having an entering fold above, the margin dilated 

 and reflexed. Length 25^, diam. 8-8J, length of aperture 9^-10 

 mill. Brazil: Rio Janeiro (Sowerby, Paz). 



Bulinus janeirensis SOAVB., Conch. Illustr., Bulinus, p. 8, f. 97 

 Bulimus janeirensis REEVE, Conch. Syst., ii, pi. 174, f. 97 (printed 

 from same plate) ; Conch. Icon., pi. 38, f. 226 (1848). PFR., 

 Symbols? ii, p. 47; Monogr. ii, p. 96; iii, 368: iv, 436; vi, 76. 

 HIDALGO, J. de C., 1870, p. 52 Helix menkeana Fer. in Mus. 

 Paris, according to Pfr. 



Allied to 0. fusiformis, but wanting teeth without the outer lip. 

 Fig. 22. is a copy of the original illustration. 



Var. miliola (Orbigny). PI. 10, figs. 25, 26, 27, 28. 



Similar to the type but often larger, with as many as 9 or 9^ 

 whorls, the surface netted with creamy raised lines on a corneous 

 ground except around the periphery, where there is usually a girdle 

 of alternate light and dark blotches, ascending the spire above the 

 sutures. Parietal wall usually bearing a small, acute lamella ; an 

 oblique lamella usually superposed upon the columellar fold, which is 

 abruptly truncate below ; basal lip often developing a small tubercle, 

 its place marked by an external pit. Dimensions from those of 0. 

 janeirensis to alt. 32^, diam. 9J, aperture 11 mill. 



Rio Janeiro (Fontaine); Piquete, prov. Sao Paulo (von Ihering, 

 fig. 27). 



Helix (Bulimus) miliola ORB., Voy. dans I'Amer. Merid., Atlas 

 des Mollusques, pi. 39, f. 1, 2 (1846). Bulimus fuscagula Orb., 



REEVE, Conch. Icon. pi. 47, f. 305 (1848); not of Orbigny 



Odontostomus juvencus MOERCH, Catal. Yoldi, p. 29 (1852) based 

 upon Orbigny's figures. 



The distinction between species and variety does not seem sharply 

 defined in some specimens ; but the squarely truncate columella is 

 the most stable differential feature of the latter. Fig. 26 is a copy 

 of d'Orbigny's illustration. Figs. 27, 28, are from Piquete, sent by 

 Dr. H. von Ihering. 



