4 PSEUDOSUBULINA. 



subulina, ( f) trypanodes MARTENS, Biologia p. 303, pi. 17, f- 

 16, 16 a, b. 



Distinguished from P. fortis by the number of whorls, 12 in 

 a length of 13 mm. The figure is copied from the Biologia 

 Centrali Americana, and represents the type specimen. 



6. P. TEXOLOENSIS Pilsbry. PI. 5, fig. 9. 



Shell turrite, imperforate, faintly greenish yellow tinted, 

 composed of numerous short, wide whorls, sculptured with 

 close-set rib-striae separated by smooth, slightly wider inter- 

 vals ; outlines of spire decidedly concave above. Whorls lO 1 /^,. 

 convex, the ribs subobsolete on the base of the last one. Apex 

 obtuse, the first whorl rapidly widening, smooth, the second 

 becoming very finely rib-striate, the next three whorls more- 

 coarsely ribbed, scarcely increasing in width or in the dia- 

 meter of the spire ; following whorls gradually widening and 

 increasing the diameter of the spire ; last whorl short, moder- 

 ately convex, abruptly contracting below. Aperture ovate- 

 trapezoidal; columella concave above, abruptly truncated, 

 Achatina-like, at the base. Length 9.2, diam. 3, length of 

 aperture 2.6 mm. 



Mexico: Texolo, State of Vera Cruz (S. N. Rhoads.). 



P. texoloensis PILS., Proc. A. N. S. Phila. 1899, p. 398 ; 1903,. 

 p. 774, pi. 50, f. 2. 



The shortness of the whorls and contraction of the upper 

 part of the spire (as in the young of many species of Uro- 

 coptis) , are the more prominent features of this species. The 

 columella is much more strongly truncated than in P. berendti. 



7. P. ROBUSTA Martens. PI. 5, fig. 20. 



Shell imperforate, subconic-turrite, vertically closely cos- 

 tulate-striate, glossy, yellowish. Whorls 10, the first 2 sub- 

 globose, smooth, the third somewhat narrowed, from the fourth 

 on regularly increasing and sculptured; suture rather im- 

 pressed; the last whorl subconvexly tapering. Aperture 

 rather oblique, oblong-trapezoidal, the outer margin arcuate 

 above, then straightened, basal margin broadly rounded, colu- 

 mellar margin a little twisted, lightly thickened, whitish, at 



