EUGLANDINA. 189 



of the fourth whorl the spiral strise set in. The last whorl is 

 closely plaited, the plaits somewhat irregular, 2 l /2 to 3 in 1 

 mni. on the last whorl, sometimes dividing, and very conspic- 

 uously cut by spiral grooves, which continue strong to the 

 very base, though the plaits weaken below the middle and are 

 nearly obsolete at the base. The suture is weakly, irregularly 

 crenated by the riblets, which terminate above in a border of 

 oblong beads. The rather long, conic spire has very slightly 

 convex outlines below, the summit being small for a Euglan- 

 dina of this size. The columella is nearly straight. The fig- 

 ured example measures, length 39, diam. 15.7, aperture 22.7 

 mm. ; whorls 7. 



E. corneola is sculptured much more coarsely than E. de- 

 cussata, the vertical plicae being less regular and the spiral 

 striae coarser and much further apart. It, moreover, has not 

 the peculiar columella, of that Guatemalan species. The 

 Texan E. singleyana is a much more finely, weakly sculptured 

 shell, with feeble spiral stria*, concave columella and more ob- 

 tuse apex. 



30. E. SINGLEYANA (W. G. Binney) . PI. 24, figs. 48, 49, 50, 51. 



The shell is quite elongate, thin, of a light brown color, 

 quite glossy. The spire has convex outlines and a very ob- 

 tuse rounded apex. The first 2 l / 2 whorls are convex and 

 nearly smooth, but under a strong lens very fine, faint 

 growth-lines are visible; then stronger stria 1 appear, and on 

 the fifth whorl spiral sculpture begins weakly. The last 

 whorl has fine, close, unequal longitudinal striae, rather sharp 

 above, but weakening to irregular wrinkles below the periph- 

 ery; these stria? are imperfectly cut into long grains by spiral 

 impressed lines, which gradually weaken below the periphery, 

 and almost wholly disappear near the base. Whorls 6V 2 to 

 7i/{, moderately convex, the last descending more rapidly. 

 Suture pale-edged, a little irregular but not crenulated. The 

 outer lip is straightened above; columella very concave. 



Length 39, diam. 15, aperture 21.5 mm. San Antonio. 



Length 51, diam. 18, aperture 26 mm. New Braunfels. 



Texas : Austin ; San Marcos ; New Braunfels ; Victoria Co. ; 



