NEW SNAILS—PARODIZ 451 
While collecting in Misiones (northeastern Argentina) in 1943, I 
found a specimen which allows one to suppose the presence of Scutalus 
even there, but the specific identification is still very doubtful. Ac- 
tually, the area of distribution for the genus is from lat. 13° S. in 
Peru to 27° in Argentina. 
Genus Scholvienia Strebel, 1910 
Scholvienia tarmensis weeksi (Pilsbry) 
Bulimulus (Protoglyptus) weeksi Pilsbry, Proce. Acad. Nat. Sci. Philadelphia, vol. 
82, p. 357, 1930. 
Type locality: Oroya, near Tarma, 12,000 feet, east-central Peru. 
The localities for tarmensis Philippi and weeksi Pilsbry are the same. 
Topotype specimens in the collection of the U.S. National Museum 
(Nos. 272199 and 601809; collectors, Rose and Weyrauch, respec- 
tively) that are similar to the original figure of weeksi (Pilsbry, fig. 9) 
show this form to be a subspecies of tarmensis Philippi, as are those 
specimens mentioned by Hidalgo (Moluscos delal viaje Pacifico . . ., 
1869) and figured by Pilsbry (Manual of conchology, vol. 11, p. 24, 
fig. 70, 1897). The protoconch in tarmensis weeksi is not like that in 
Protoglyptus but is as in Scholvienia. 
Genus Plekocheilus Guilding, 1828 
Subgenus Eurytus Albers, 1850 
Plekocheilus (Eurytus) ameghinoi, new name 
Bulimus guildingi Dohrn, Jahrb. Deut. Malak. Ges., vol. 2, p. 307, 1875 (not 
guildingt Pfeiffer, 1842). 
Plekocheilus guentheri (Sowerby) Pilsbry, Manual of conchology, vol. 14, p. 129, 
in part, 1902. 
Type locality: ‘‘Nueva Granada” (Colombia). 
Pilsbry in 1902 suppressed guildingi Dohrn in favor of guenthert 
Sowerby (Proc. Zool. Soc. London, p. 296, 1892), but Dohrn’s and 
Sowerby’s species are two quite different forms: In guentheri the last 
whorl is much wider, the internal and external color different, with- 
out post-peristomatic white margin. Prior to the change of the name, 
Pilsbry (Manual of conchology, ser. 2, vol. 10, p. 72, 1895) placed 
guentheri as a variety of guildingi, but a separation is necessary, and 
guildingt Dohrn still needs a new name. In giving the new name, 
I take the opportunity to honor the great South American naturalist 
Florentino Ameghino, whose centennial was celebrated in 1954. 
