448 PROCEEDINGS OF THE NATIONAL MUSEUM vou. 113 
The specimens measure (in mm.): 
Height Diameter Last whorl Aperture 
USNM 23 8 13 8. 9x5. 1 
22. 2 ao 12.5 8. 5xd 
22, 2 Go 12°58) 5x5 
CM 20. 4 a 12 7. 9x5 
In all specimens: Sutural angle 9°, spiral angle 26°. 
I have also seen material of P. montivagus from different localities 
of Bolivia and Argentina, as given below. The numbers in paren- 
theses are of the mollusk catalog of the Museo Argentino de Ciencias 
Naturales. The names immediately following the numbers are those 
of the collectors; dates of collection follow the names of collectors if 
available. Provinces are shown in italic. 
Bolivia: Between Izozo and Santa Cruz (2126); Carandaity (3127); Charagua 
(3128); near Parapeti River to Lagunilla (9340); all collected by C. Lizer and 
L. Deletang, 1917. 
Argentina: Catamarca: La Puerta, Department of Ambato (483), A. Kerave- 
nant. Tucumdn: Tapia (1344), E. L. Holmberg. Tucuwmdn: North of Sierra 
San Javier (9860), F. Pastore, 1916. Entre Rios: Parand (9998), J. Frenguelli 
1920; (14644), J. Migoya, 1924. Tucumdn: Lamadrid (12116), W. B. Alexander, 
1921. Santiago del Estero: Cerro del Remate (23044/45), J. Yepes and R. 
Schreiter, 1926. 
All these specimens of montivagus are smaller than any of the 
cutisculptus I have now at hand. 
Genus Kuschelenia H. Scott, 1951 
Kuschelenia simulans H. Scott 
Kuschelenia simulans H. Scott, Acta Zool. Lilloana, vol. 12, p. 539, 1951 
The type, in the collection of the author, is from Potosi, 50 miles 
south of Sucre, Bolivia. I have compared this type with one speci- 
men in the U.S. National Museum (596937), which proves to be the 
same species, but is labelled as coming from Peru. Mrs. M. H. 
Scott de Birabén assured me that the identification of the specimen 
is correct. 
The external characters of Kuschelenia are somewhat like Plecto- 
stylus-Drymaeus, but the principal differences are based upon the 
anatomy: Radula similar to Bulimulus; seminal peduncle short and 
seminal vescicle cylindrical and canal deferens terminal; all these 
characters of the genitalia are different from those of Bulimulus, 
Drymaeus, and Plectostylus. 
