446 PROCEEDINGS OF THE NATIONAL MUSEUM VoL. 113 
Columella inclined 5° to the right and in the same degree that the 
suture is inclined in relation to the base. Spiral angle 25°. 
Holotype (USNM 361797) from Choretirni, southern Bolivia, 
collected by G. L. Harrington, August 1923. It measures: Height 
9.5 mm., major diameter 3.8 mm., minor diameter 3.5 mm., last 
whorl 5.9 mm., aperture 3.8x1.9 mm. Seven paratypes, young. 
The locality Choretirni (or Choreti, as it is given often on maps) is 
southwest of Lagunilla and Charagua, near the confluence of the 
rivers which form the Parapeti, at the foot of the Cordillera Oriental. 
The ribs of the protoconch in this species are well separated but 
not strong as in other Protoglyptus (25 in the first whorl) and more 
numerous in the young (about 30), without traces of spiral lines 
between. 
This species is the smallest of all the known Protoglyptus. In 1946 
(Comun. Zool. Mus. Hist. Nat. Montevideo, vol. 2, no. 27) I described 
P. deletangi (from the province of Salta, Argentina), which was only 
13.5 mm. in length. Haas in 1948 (Fieldiana Zool., vol. 31, p. 190) 
described P. subcostatus, even smaller (12.4 mm.), from Peru, but 
minutissimum is indeed a real pygmy among the smaller Protoglyptus. 
P. deletangi Parodiz is 40 percent larger and is very elongated, 
somewhat pupoid in form, with a smaller aperture and a more oblique 
suture (15°); the ends of the aperture are more separated. P. sub- 
costatus Haas, on the other hand, is a broader species, with the length 
of aperture and width of last whorl both less than one-third the total 
length, with stronger growth ribs, one more whorl, base of aperture 
not angulated, and umbilicus and peristome pink with a brown belt 
around the umbilical zone. The new species does not present any 
peculiar coloration. 
Protoglyptus (Protoglyptus) cutisculptus (Ancey) 
Protoglyptus montivagus Pilsbry (in part), Manual of conchology, vol. 11, p. 90, 
1897. 
Bulimulus cutisculptus Ancey, Le Naturaliste, ser. 2, no. 339, p. 92, 1901. 
Ancey proposed the name cutisculptus for specimens referred to as 
montivagus from Corumbé, Matto Grosso, “in the case this form 
proves distinct from d’Orbigny’s.”’ He says that it is ‘perforate (not 
narrowly rimate as in montivagus), uniform horn-colored, larger, with 
fine spiral striae on the epidermis similar to those observed in trichodes, 
the same as figured by Reeve under montivagus.”’ This indication is 
enough according to the International Rules of Zoological Nomen- 
clature to give validity to Ancey’s name. 
Pilsbry (1897) had distinguished the form from Corumba as “‘Tusset 
or corneus-brown, without stripes or with one or a few on the last 
whorl.’”’ The surface is shining and shows very minute spiral cuticular 
