338 PROCEEDINGS OF THE ACADEMY OF [1892. 



NOTES ON A COLLECTION OF SHELLS FROM THE STATE OF 

 TABASCO, MEXICO. 



BY HENRY A. PILSBRY. 



The Academy has received during the past summer, several 

 parcels of land and fresh-water mollusks collected by Professor 

 Jose N. Rovirosa, mainly in the State of Tabasco, Mexico. As a 

 portion of them are of considerable interest, the writer has drawn up 

 the following list. 



Glandina ghiesbreghti Pfr. 



San Juan Bautista, Tabasco. 

 Streptostyla nigricans Pfr. 



Mountains of Poana, Tabasco. 

 Eucalodium compactum n. sp. (PI. XIV, fig. 4.) 



Shell cylindrical-tapering, solid, having a short, closed umbilical 

 chink; the cuticle thin, evanescent, very pale straw colored ; com- 

 posed of 9 narrow, somewhat convex whorls, which are rather 

 strongly striated, the strice arcuate, irregular in places, and from one- 

 half to one-third of a millimeter apart except on the last whorl where 

 they are closer ; last whorl angular in front of the upper angle of 

 the aperture, becoming well rounded but retaining a trace of the 

 peripheral angle on its latter half. Aperture oblique, irregularly 

 ovate ; j^eristome continuous and free from the preceding whorl, 

 well expanded ; columella having an obsolete fold. Internal axis 

 having a strong spiral fold. Alt, 53, diam. 19* mill. 



Tabasco, Mexico. 



Cylindrella morini Morel. 



Mountains of Poana, Tabasco. 



AmpuUaria ghiesbreghti Reeve. 



San Juan Bautista, Tabasco. 

 Chondropoma rubicundum Morel. 



Mountains of Poana, Tabasco. 

 Cyclophorus maleri Crosse & Fischer. 



Mountains of Poana, Tabasco. 

 Cyclotus dysoni Pfr. 



Mountains of Poana, Tabasco. 



