194 EUGLANDINA. 



Glandina victoriana PILS., Proc. A. N. S. Phila. 1903, p. 

 771, pi. 47, f. 4, 4 a, 6. 



Distinguished by its narrow, elongate shape, smooth, reg- 

 ular and close riblets without spiral lines, and the occasional 

 variceal white lines marking the positions of former peri- 

 stomes. There are two of these lines on the back of the 

 specimen figured, four on the last whorl of one 44 mm. long. 



36. E. DELICATA (Pilsbry). PL 28, figs. 48, 49, 50. 



Shell pale-corneous, thin and delicate; fusiform, tapering 

 toward both ends. Surface closely rib-striate, the costulae 

 about as wide as the intervals, quite smooth, and slightly 

 weaker at the base. Spire tapering to a rather small apex, 

 the first 3 whorls smooth, striae then gradually appearing. 

 Suture a little crenulated by the striae in places, elsewhere 

 somewhat irregular but not crenulate : having a narrow trans- 

 parent-gray margin. Aperture more than half the shell's 

 length, the outer lip thin, but slightly arched forward in the 

 middle, receding at base. Columella short and nearly straight, 

 abruptly truncate. 



Length 23.7, diam. 9, length of aperture 14 mm. ; whorls 6. 



Northeast Mexico : canyon four miles west of Victoria, Ta- 

 maulipas (S. N. Rhoads). Types 85917 A. N. S. P. 



A small, sharply striate species, with larger aperture than 

 E. delicatula. 



37. E. ALTICOLA (Pilsbry). PI. 28, figs. 51, 52, 53. 



Shell small and thin, cylindric-fusiform, fleshy-brown with 

 pale summit. Spire conic with obtuse apex. The first whorl 

 is somewhat raised, though the apex itself is depressed; first 

 2!/2 whorls smooth, convex, then striae appear near the suture ; 

 after the third whorl the striae continue from suture to suture. 

 The last whorl has strong, rather sharp, smooth rib-striae 

 which weakly crenulate the suture and continue to the base. 

 The last half-turn of the suture descends a little more than 

 the preceding whorls. Aperture narrow ; outer lip thin, pro- 

 jecting forward in the middle. Columella very short, concave. 



Length 16, diam. 6, aperture 9.2 mm.; whorls 5%. 



