180 PROCEEDINGS OF THE VATIONAL UU8EUM. vol.38. 



livid brown. The umbilicus varies as above stated, the color varia- 

 tions are from pale unicolorate to profusely brown axially streaked 

 or with two dark spiral bands, of which one is above the periphery 

 and the other below it, the latter being covered by the advancing 

 whorl. The form is quite constant, being rather elongate and atten- 

 uate toward both ends. The B. stenacme Pfeiffer, J>. reconditus and 

 ii'uji'o [Meatus Reeve, are all of a more conical type, with a broader 

 not attenuate last whorl, and while doubtless to be united with each 

 other under the earliest name, are, so far as my material permits me 

 to judge, better kept separate from the present group as Morelet 

 proposed. 



The species is reported on Angrand's authority as living on cacti 

 of the genus Circus, in the interior of the sierra west of Cuzco, in the 

 valleys of Abancay and Acostambo, and is doubtless widely dis- 

 tributed. 



U. S. Nat. Mus. No. 200269. 



BULIMULUS (LISSOACME) BINGHAMI, new species. 



Shell stout, wide, conic, with a smooth nucleus of about two whorls 

 and four subsequent whorls; for somewhat over two whorls the young 

 shell has a prominent keel against which the suture 

 is closely apprcssed, so that the presence of tin 1 keel 

 requires close examination to recognize; a little be- 

 yond the end of the second whorl the keel disappears 

 below the suture, and only very obscure traces of it 

 remain on the last whorl ; t he spire as a whole is con- 

 vexly conic, the separate whorls project but little; 

 the last whorl rapidly enlarges with a rounded 

 Fig. 2.— Bulimulus perinherv, evenlv rounded into a wide subcvlindrie 



(LISSOACME) liING- ± l •/ ' ^ 



1,AMI - umbilicus; sculpture of well marked retractively 



arcuate wrinkles, with subequal interspaces obsoletely spirally striate; 

 the sculpture is most obvious on the spire and on the part of the last 

 whorl behind the periphery: toward the aperture the whorl descends 

 a little below the periphery; the well-reflected outer lip bends mark- 

 edly toward the posterior end of the pillar lip, and the two are joined 

 by a thin glaze over the body; the pillar lip is very broad and thin. 

 half obscuring the umbilicus; the pillar is straight without any twist 

 or fold; the color of the shell is yellowish white, with more or less 

 distinct pale brownish spiral lines or narrow bands; the lip is whitish, 

 the interior of the aperture pale yellowish-brown; the nucleus is 

 slightly mammillary. Height of shell, 36 ; of last whorl. 10: of 

 aperture (vertical), 13; maximum diameter of shell, 20; of aperture, 

 I I : of umbilicus, 2.5 mm. 



Collected from cacti on the banks of the Rio Pampas. Peru, by Dr. 

 1 [iram Bingham. 



