112 HELIX-MICROPHYSA. 



impressed sutures. Apex obtuse ; last whorl rounded at the periph- 

 ery. Surface smooth, very lightly striatulate, having long, whitish, 

 sparsely scattered, delicate hairs, usually rubbed off except at the 

 sutures. Aperture slightly oblique, oval, parietal wall a little flat- 

 tened. Lip sharp, acute, very slightly expanded at the columellar 

 margin. Alt. 2, diam. 1'8 mill. 



Orizaba, Mexico. 



Patula intonsa PILS., Proc. Acad. N. 8. Phila. 1891, p. 314, t. 15, 

 f. 1-3. 



The sparsely scattered, partly deciduous hairs are peculiar and 

 characteristic. 



P. VENEZUELENSIS Jousseaume. PI. 21, figs. 24, 25. 



Shell broadly and deeply umbilicated, suborbiculate-depressed, 

 thin; brown-flesh colored ; striate; ornamented with irregular and 

 oblique caducous lamellae. Whorls 4, convex, obtusely carinated. 

 Aperture subrotund; peristome simple, thin and acute. 



Alt. 2, greater diam. 4, lesser SJ mill. (Jouss.) 



Colony of Torar, and at Valencia, Venezuela. 



Trichia venezuelensis Jouss., Mem. de la Soc. Zool. de France, ii, 

 p. 248, t. 9, f. 12, 13, 1889. 



The cuticle is thin and covered with little caducous, close oblique 

 lamellse, the free edges of which bear very short hairs, flattened and 

 elongated in the direction of the lamellse. 



P. ROJASI Jousseaume. PL 21, figs. 26, 27. 



Shell deeply umbilicately, subglobose, thin, brown-flesh colored, 

 obliquely striated with scaly lamellse. Whorls 4, rounded, convex. 

 Aperture subrotund ; peristome simple, thin, acute. 



Alt. 2, greater diam. 3, lesser 2 2 mill. (Jouss.) 



Caracas, Venezuela. 



Trichia rojasi Jouss., Mem. Soc. Zool. Fr. ii, p. 249, t. 9, f. 9, 10. 



The surface is covered with a laraellose cuticle ; the lamellse are 

 slashed on the edges, giving the appearance of minute, regularly 

 arranged scales. This species is closely allied to the preceding. 



