BULIMULUS-NAESIOTUS. 115 



erosion. Except the largest specimens of B. nux, these shells are 

 the largest Bulimuli described from the islands. They are, however, 

 thinner than any specimen of B. mix, in this respect resembling B. 



unifasciatus Sby." (Dalfy. 



B. DARWINI (Pfeiffer). PL 23, fig. 26. 



Shell deeply rimate, ovate-conic, rather solid, strongly sculptured 

 with wavy and crispate wrinkles ; dull whitish. Spire conic, rather 

 acute, corneous. Whorls 6, convex, the upper three smooth, the 

 last about as long as the spire. 



Aperture wide, suboval, rather shining inside, white, with a cal- 

 lous tubercle deep within on the parietal wall; peristome simple, 

 straight ; right margin arcuate above, columellar margin much 

 dilated, spreading. Columella somewhat twisted, subvertical. (Pfr.) 



Alt. 17, diam. 9, length of aperture 8J mill. 



Galapagos Is. (Darwin) ; Bindloe I. (Habel). 



Bulimus Danvini PFR.,P.Z.S.,1846,p. 29. Mon.Hel.Viv, ii, p. 199, 

 1848. REEVE, Conch. Icon., pi. xxi, fig. 136, 1848. Bulimulus 

 (Omphalostyla) Danvini H. & A. AD., Gen. Rec. Moll., II, p. 161, 

 1855. WIMMER, Sitzb. Akad. Wiss. Wien, Ixxx, p. 44, 1879 Bul- 

 imulus (Nesiotes') Danvini MARTENS, in Albers, Heliceen, ed. ii, p. 

 220, 1860. Bulimulus (N&siotus) Danvini PFR., Mon. Hel. Viv, p. 

 254, 1881. REIBISCH, Isis, 1892, p. 22. STEARNS, Proc. U. S. Nat. 

 Mus., XVI, p. 427, 1893. BALL, Proc. A. N. S. Phila., 1896, p. 439. 

 Bulimus manini " Pfr." CARPENTER, Rep. Brit. Assoc., 1856, p. 

 359. STEARNS, p roc . u. S. Nat. Mus., XVI, pp. 405, 427, 1 893 (Err. 



" The type specimen of this species has disappeared from the 

 Cumingian Collection, and I have been unable to obtain a specimen 

 for examination. The only reference to the particular island upon 

 which it lives is derived from Habel " (Dall). 



B. WOLFI Reibisch. PL 23, figs. 22, 23. 



Shell inflated-ovate, perforate or umbilicate, solid, somewhat shin- 

 ing, buff, arcuately streaked, towards the aperture nodose-plicate, 

 with a pale, narrow band. Spire wide, rather acute, suture rather 

 deep. Whorls 7, sculptured with very delicate spiral lines, the last 

 separated by a deeper suture, somewhat furrowed at the position of 

 the peripheral band, and tuberculately plicate on each side of it. 

 Nucleus delicately striated. 



