216 PROCEEDINGS OF THfi ACADEMY OF [DeC, 



Guppya qundlachi (Pfr.) was taken by Mr. Hinkley at Tampico 

 and near San Dieguito, San Luis Potosi, and at the Maya Farm, 

 Quirigua, Guatemala. 



Guppya Jalisco n. sp. PI. XI, fig. 6. 



The shell is minute, umbilicate (the umbilicus small, round, about 

 one-ninth the diameter of the shell), light brown, somewhat glossy, 

 very minutely striate, the striae decussated by close, microscopic 

 spirals on the spire. The spire is somewhat dome-shaped, the 

 outlines convex, summit obtuse. The whorls are closely coiled, 

 nearly equal, very convex, the last one rounded peripherally and 

 convex below. Aperture rather narrow, somewhat lunate. Col- 

 umellar margin a little dilated. 



Alt. 1.7; diam. 1.9 mm.; 5 whorls. 



Guadalajara, Jalisco, Mexico. Type, No. 44,839 A. N. S. P., 

 collected by R. A. McConnell, 1909. 



A very small, compactly coiled shell, much smaller than G. ele- 

 gantula. 



Pseudohyalina maya n. sp. PI. XI, figs. 5, 5a. 



The shell is very minute, shaped much like Z. nitida (Mull.); 

 pale yellow; openly umbilicate, the width of umbilicus somewhat 

 more than one-fourth of the diameter of shell. Surface glossy, 

 showing very faint growth lines under the microscope, bat without 

 spirals. Whorls well rounded, slowly increasing. Aperture lunate, 

 somewhat oblique. 



Alt. 1.1, diam. 1.75 mm.; very nearly 4 whorls. 



Maya farm, Quirigua, Guatemala (A. A. Hinkley). Type and 

 paratypes. No. 107,511 A. N. S. P.; also in coll. Hinkley. 



This form is smaller than Hyalinia permodesta var. rninor v. Mar- 

 tens. 

 Pseudohyalina opal n. sp. PI. XI, figs. 7. 7a. 



Shell very minute, corneous, smooth except for faint lines of 

 growth, having a somewhat silky luster above, glossy beneath; 

 rather narrowly umbilicate, the width of umbilicus contained about 

 61 times in the diameter of the shell. Whorls 4J, convex, the last 

 well rounded; suture compressed, narroAvly margined. Aperture 

 lunate. 



Alt. 1.2, diam. 1.95 mm. 



Polvon, Nicaragua. Types, No. 48, 523 A. N. S. P., collected by 

 the McNeil expedition. 



