THE NAUTILUS. 41 
A NEW SPECIES OF BULIMUS. 
BY H. A. PILSBRY. 
Anctus (?) Stearnsianus n. sp. 
Shell narrowly umbilicate, subulate, tapering, rather solid but not 
thick ; covered with an opaque dark olivaceous-brown cuticle, indis- 
tinctly and irregularly streaked obliquely, and wanting on the 
fleshy-whitish earlier whorls. Surface shining, with close, fine 
growth-wrinkles and very minute, close and superficial spiral strize. 
Spire tapering regularly from the last whorl to the obtuse apex, 
which is smooth (but somewhat worn) in the specimens. Whorls7, 
hardly convex, with linear sutures, the last not deflexed. 
Aperture contained about 2} times in alt. of shell, long-ovate, 
dull purplish within, somewhat oblique; peristome white, obtuse, a 
trifle expanded at the edge, the margins in a plane and brought for- 
ward to the level of the front of the body-whorl ; columellar margin 
expanded ; parietal callus rather heavy. 
Alt. 19, diam. 7; alt. of aperture 8 mill. 
Alt. 193, diam. 73; alt. of aperture 83 mill. 
Sierra de la Ventana, Argentina (U.S. F. C.). 
A peculiar species, not agreeing well with others of this group, 
but so far as I can see not referable to any section of Bulimulus. In 
my opinion, Anctus is to be grouped with Odontostomus, Tomigerus 
and Anostoma, not with the true Bulimuli. 
The first whorl in this species is truncated pyramidal, with the 
earlier third depressed, rapidly ascending; a comma-shaped apical 
pit passed into the suture. The whorl just back of the upper angle 
of the aperture, is somewhat flattened, recalling the condition so con- 
spicuous in Plekocheilus Taylorianus Rve. It is named in honor 
of my friend R. E. C. Stearns, who some years ago transmitted to 
me for identification specimens collected by the “Albatross.” 
LAND MOLLUSCA FROM THE REJECTAMENTA OF THE RIO GRANDE, 
NEW MEXICO. 
BY T. D. A. COCKERELL. 
A few weeks ago I collected a quantity of small land shells in the 
rejectamenta of the Rio Grande at Mesilla, and sent them all to Dr. 
Sterki, who has kindly identified them as follows: 
