1903.] 



NATURAL SCIENCES OF PHILADELPHIA. 



77 



73 



Salasiella perpusilla (Pfr.)- Figs. 2, 3. 



Diente, Nuevo Leon. Figured for comparison with the following 

 species. The specimens from Orizaba formerly identified by me as 

 S. perpusilla,^ appear on renewed study with more material to be *S. 

 modesta Pfr. As Strebel has pointed out, .S. perpusiUa is more convex 

 below the suture than S. modesta; and the same feature distinguishes 

 it from S. minima and S. suhcylindrica. The specimen from Diente 

 shown in fig. 3 measures: length 3.3, diam. 1.4, length of aperture 1.9 

 mm. 



Salasiella modesta (Pfr.) Figs. 4, 5. 



Glandina (Salasiella) perpusilla Pilsbry, Proc. Acad. Nat. Sci. Phila., 1891, 

 p. 311. 

 Two specimens from Orizaba, an adult and a young one, are figured. 



Fig. 1. Salasiella suhcylindrica. Diente, near Monterey. 

 Figs. 2, 3. Salasiella perpusilla. Diente, near Monterey. 

 Figs. 4, 5. Salasiella modesta. Orizaba. 

 Fig. 6. Salasiella minima. Orizaba. 



(All figures drawn with camera lucida to tlie same scale.) 



the latter for comparison with S. minima, the former with S. s^ih- 

 cylindrica. The specimen drawn in fig. 4 measures: length 3.7, diam. 

 1.47, length of aperture 2.1 mm. 

 Salasiella minima n. sp. Fig. 6. 



Very minute, cylindric-oblong, almost equally obtuse at both ends ; 

 thin, corneous and transparent, showing the internal partitions 

 through the shell. Surface glossy and but very faintly marked with 

 gro^\'th-lines. Whorls 4; suture with a narrow margin by transpar- 

 ence. Other characters as usual in the genus. Length 2.6, diam. 1, 

 length of aperture 1.6 mm. 



^ Proc. Acad. Nat. Sci. Phila., 1891, p. 311. 



