434 PROCEEDINGS OF THE NATIONAL MUSEUM you. 113 
Neopetraeus stelznert Dohrn from central Argentina. Ihering never 
saw specimens of peristomatus; after its description in 1879 it was not 
found again until 1944, when I examined specimens from the type 
locality (Chancani, Cérdoba, Argentina). 
Numerous lots of Bulimulus rushi (in the USNM, MCZ, and 
MACN collections) have been reviewed, the species being distributed 
in southern and western Uruguay, and the provinces of Entre Rios 
and Corrientes in Argentina. Numerous specimens, with well-pre- 
served periostracum, from Arroyo Yacui, Artigas, northern Uruguay, 
were received recently from my colleague, Mr. M. A. Klappenbach, 
of the Museum at Montevideo. Living, it is not found west of the 
Parana River, but in the province of Buenos Aires there are subfossil 
specimens in the Pleistocene beds at Tolosa, near La Plata. 
Bulimulus vesicalis uruguayanus Pilsbry 
Bulimulus vesicalis uruguayanus Pilsbry, Manual of conchology, ser. 2, vol. 10, 
p. 69, 1897. Parodiz, Nautilus, vol. 70, p. 133, 1957. 
Type locality: Cerro de Montevideo, Uruguay. 
One specimen from Paraguay (USNM 381378) has certain affinities 
with this species, which is, however, more peculiar to the southwestern 
part of Uruguay, in Paysandi, Soriano, and Canelones, according to 
the many specimens that have been examined in the U.S. National 
Museum as well as in the Museum of Comparative Zoology and Museo 
Argentino de Ciencias Naturales; most of the specimens in these 
collections were labelled as rushii, from which this species differs by 
its rimate perforation, longer and thinner shell, and well-marked 
zigzag nepionic sculpture, which in rushiw is weakly waved; it also 
differs from any of the varieties of Bulimulus bonariensis Rafinesque 
(=sporadicus) by its peculiar unbilical area. Formica Corsi’s figure 
for sporadicus (Anales Nac. Montevideo, vol. 2, p. 291, 1900) is very 
probably vesicalis uruguayanus. In addition, I examined specimens 
from Piedras Blancas, Uruguay, which are larger than those of Pils- 
bry’s type lot: Height 27.5 mm., diameter 15 mm., aperture 14 mm. 
In Argentina it is found only as subfossil in the Pleistocene of 
Buenos Aires. 
Bulimulus jujuyensis Holmberg 
Bulimulus (Thaumastus) jujuyensis Holmberg, Apuntes Hist. Nat., vol. 1, p. 11, 
1909. 
Bulimulus jujuyensis, H. Scott, Rev. Mus. La Plata, Zool., vol. 4, p. 206, 1945. 
Bulimulus jujuyensis, Parodiz, Nautilus, vol. 70, p. 134, 1957. 
Type locality: Tilcara, Quebrada de Humahuaca, Jujuy, Argentina. 
The type specimen and other specimens (in MACN) from the type 
locality as well as from Formosa, which is east of Jujuy, were examined. 
