178 EUGLANDINA. 



Near the end of the second whorl some malleation appears, 

 and then fine, regular striation gradually begins (pi. 21, fig. 

 4). The last whorl is closely, rather irregularly plicatulate, 

 and covered with a very fine, close sculpture of engraved 

 spirals. The spire is straightly conic, the suture crenulate, 

 with a whitish seam-like border, the ends of the plica? being 

 swollen, single or a few of them in pairs, and defined by an 

 impressed groove, more or less distinct. The columella is al- 

 ways very concave. 



Length 61, diam. 23, aperture 31 mm. (Albers). 



Length 63, diam. 25.5, aperture 31.5 mm. (Arva). 



Length 53.5, diam 23.5, aperture 28.6 mm. (Yucacas). 



The specimens figured are from Arva (fig. 10) and from 

 near Yucacas (figs. 4, 11, 12). 



4. E. SWIFTI Pilsbry, n. sp. PI. 21, figs. 1, 2, 3. 



The shell is long and narrow, solid and opaque, without 

 noticeable cuticle, having the nude appearance of E. rosea 

 parallela. It is flesh-colored, with whitish streaks at wide, 

 unequal intervals, darker in front of the streaks. The long- 

 spire has nearly straight outlines and obtuse apex. The em- 

 bryonic shell resembles that of E. truncata Gmel. (G. sub- 

 varicosa Alb.) in shape of the first two whorls, the first being 

 planorboid, the second subaugular at the shoulder, flattened 

 above it, flatly sloping and malleate below. Near the end of 

 the second whorl very fine, regular striation begins, contin- 

 uing to the end of the embryonic shell, which consists of S 1 /^ 

 whorls. After this, the whorl widens rather abruptly, the 

 sutural nodules appear, and spiral striation becomes distinct 

 (pi. 21, fig. 3). The last whorl has sculpture of coarse, irreg- 

 ular longitudinal folds, cut by very fine engraved spirals. 

 The folds are swollen into grains at the sutural border, which 

 is defined by a groove. The suture is crenulated (fig. 2). 

 The aperture is long and narrow, vertical. The columella is 

 concave above, then nearly straight, broadly and horizontally 

 truncate at its base. 



Length 64.5, diam. 22, aperture 30 mm. ; whorls 

 Length 61.3, diam. 22, aperture 28.6 mm. ; whorls 



