2 PROCEEDINGS OF THE NATIONAL MUSEUM vol.81 



Remarks. — Three of the paratypes are almost exactly like the type ; 

 the fourth is slenderer, its columella somewhat oblique and twisted. 

 The species is closely related to Bulimulus {Scutalus) fluto Crosse, 

 but is larger, darker, more inflated, its columella nearly perpendic- 

 ular, much wider, and with no external evidence of a twist. Crosse 

 said, " the two embryonic whorls smooth and polished, whitish." 

 Probably they were worn smooth, but if perfect would be like those 

 of hessi. This si)ecies and B. {S.) yluto form a natural group quite 

 different from the group of B. (jS.) tupaeii, and yet, although lack- 

 ing any indications of granules, evidently related through that 

 sj^ecies to the subgenus Scutalus. 



BUUMULUS (SCUTALUS) BOLIVIANUS. new species 



Plate 1, Figuees 3, 4 



Shell slender, very elongate, of rather thin texture, early whorls 

 rapidly increasing in diameter, making the upper end of the spire 

 low conical; middle portion increasing slowly, making that part 

 subcylindrical ; body v/horl becoming somewhat inflated as it ap- 

 proaches the aperture, making it stand out obliquely from the gen- 

 eral contour of the whorls immediately above. Whorls 7, sutures 

 boldly marked, the top of each whorl strongly crenulated. The pe- 

 nultimate whorl after making its first half turn falls below the periph- 

 ery, giving a distorted appearance, especially to the rear view. 

 Approaching the aperture the body whorl mounts until the suture 

 is at the periphery. (The dropping and mounting of the whorl 

 may be abnormal.) Sculpture consisting of the strong crenulations 

 along the suture, many well-marked, slightly protractive growth rib- 

 lets, and very faint incised spiral lines. Nuclear whorls worn, but 

 bearing traces of nmnerous wavy, very fine vertical striae. Color 

 white, with many well-marked spiral bands and some maculations of 

 light chestnut. Aperture oblique, occupying about two-fifths the 

 length of the shell. Peristome slightly thickened within, and a 

 little reflected. Columella nearly straight and vertical, widely re- 

 flected, standing separated from the prominent umbilicus but con- 

 cealing it when viewed from the front. Edge of peristome tinged 

 with yellowish; interior of shell white, the colors of the exterior 

 showing through as bands and spots. 



Type. — The type (and only specimen, U.S.N.M. No. 382216) meas- 

 ures : Length, 61 mm ; greatest diameter, 27 mm ; height of aperture, 

 27 mm. 



Remarks. — So far as known, this is the longest and one of the slen- 

 derest Scutalus. There seems little doubt that it is properly placed 

 in the subgenus jScutahis. The sculpture of its apical whorls, the 



